Feature: Add configurable screen-preview quality levels menu

Add a "屏幕预览质量等级 (Screen Preview Quality Levels)" item to the
"高级 (Advanced)" menu that opens a dialog to edit the six preset
PreviewProfile levels (target encode width and JPEG quality) used by the
double-click single-preview and loop-snapshot floating windows. The dialog
edits a working copy in a full grid with per-field validation and a
restore-defaults button; on OK it persists the values to the [preview] INI
section.

ChooseScreenPreviewParams now reads from GetPreviewProfileCfg instead of the
hardcoded GetScreenPreviewProfile table, so preview requests sent after a
change use the configured parameters. LoadPreviewProfilesFromCfg loads the
saved levels at startup, falling back to the built-in defaults. Added
en_US/de_DE/zh_TW translations for the new menu and dialog strings.

Co-Authored-By: deepseek-v4-pro

server/2015Remote/2015RemoteDlg.cpp

@@ -44,6 +44,7 @@
 #include "common/skCrypter.h"
 #include "common/commands.h"
 #include "QualityLevelsDlg.h"
+#include "CPreviewLevelsDlg.h"
 #include "McpServer.h"
 #include "McpSettingsDlg.h"
 #include "common/md5.h"
@@ -1015,6 +1016,7 @@ BEGIN_MESSAGE_MAP(CMy2015RemoteDlg, CDialogEx)
     ON_COMMAND(ID_TOOL_V2_PRIVATEKEY, &CMy2015RemoteDlg::OnToolV2PrivateKey)
     ON_COMMAND(ID_MENU_NOTIFY_SETTINGS, &CMy2015RemoteDlg::OnMenuNotifySettings)
     ON_COMMAND(ID_TOOL_QUALITY_LEVELS, &CMy2015RemoteDlg::OnQualityLevels)
+    ON_COMMAND(ID_TOOL_PREVIEW_LEVELS, &CMy2015RemoteDlg::OnPreviewLevels)
         ON_COMMAND(ID_EXECUTE_TESTRUN, &CMy2015RemoteDlg::OnExecuteTestrun)
         ON_COMMAND(ID_EXECUTE_GHOST, &CMy2015RemoteDlg::OnExecuteGhost)
         ON_COMMAND(ID_MASTER_TRAIL, &CMy2015RemoteDlg::OnMasterTrail)
@@ -2409,6 +2411,7 @@ BOOL CMy2015RemoteDlg::OnInitDialog()
     LoadThumbnailSettingsFromCfg();
     ApplyThumbnailSettings();
     LoadQualityProfilesFromCfg();
+    LoadPreviewProfilesFromCfg();
     m_runNormal = THIS_CFG.GetInt("settings", "RunNormal", 0);
 
     CMenu* SubMenu = m_MainMenu.GetSubMenu(2);
@@ -8797,7 +8800,7 @@ void CMy2015RemoteDlg::OnListSingleClick(NMHDR* pNMHDR, LRESULT* pResult)
     OpenLoopTip(ctx, anchor);
 }
 
-// 屏幕预览参数挑选：复用既有 GetTargetQualityLevel + GetScreenPreviewProfile
+// 屏幕预览参数挑选：复用 GetTargetQualityLevel + GetPreviewProfileCfg（可配置的 6 档预览参数表）
 // RTT 阈值表与屏幕共享共用（FRP 模式阈值更宽松）；超清档（Ultra/High）+ 4K/超宽屏
 // 时按 min(screenWidth/4, 1280) 自适应放大，避免高分屏被压成无信息缩略图
 void CMy2015RemoteDlg::ChooseScreenPreviewParams(context* ctx, WORD& maxWidth, BYTE& jpegQuality) const
@@ -8811,7 +8814,7 @@ void CMy2015RemoteDlg::ChooseScreenPreviewParams(context* ctx, WORD& maxWidth, B
     int rttForLevel = ping > 0 ? ping : 250;
 
     int level = GetTargetQualityLevel(rttForLevel, m_settings.UsingFRPProxy ? 1 : 0);
-    const PreviewProfile& prof = GetScreenPreviewProfile(level);
+    const PreviewProfile& prof = GetPreviewProfileCfg(level);
     int base = prof.maxWidth;
     BYTE q   = (BYTE)prof.jpegQuality;
 
@@ -9205,6 +9208,58 @@ void CMy2015RemoteDlg::OnQualityLevels()
     }
 }
 
+// ===== 屏幕预览质量等级配置（[preview] 节） =====
+// 6 档 PreviewProfile 的读写入口。缺省值回落到 common/commands.h 的
+// GetScreenPreviewProfile()，与内置预览参数表一致；用户改过的档位单独落盘到 INI。
+
+void CMy2015RemoteDlg::LoadPreviewProfilesFromCfg()
+{
+    // 先整体回落到内置默认，再逐字段覆盖，避免 INI 缺项时读到 0
+    for (int i = 0; i < QUALITY_COUNT; i++) {
+        m_PreviewProfiles[i] = GetScreenPreviewProfile(i);
+    }
+
+    for (int i = 0; i < QUALITY_COUNT; i++) {
+        std::string sec = "preview" + std::to_string(i);
+        PreviewProfile& p = m_PreviewProfiles[i];
+
+        p.maxWidth    = THIS_CFG.GetInt("preview", sec + "_maxWidth",    p.maxWidth);
+        p.jpegQuality = THIS_CFG.GetInt("preview", sec + "_jpegQuality", p.jpegQuality);
+
+        // Clamp 到安全范围（防 INI 被手工编错）
+        if (p.maxWidth < 64)          p.maxWidth = 64;
+        if (p.maxWidth > 2560)        p.maxWidth = 2560;
+        if (p.jpegQuality < 1)        p.jpegQuality = 1;
+        if (p.jpegQuality > 100)      p.jpegQuality = 100;
+    }
+}
+
+void CMy2015RemoteDlg::SavePreviewProfilesToCfg() const
+{
+    for (int i = 0; i < QUALITY_COUNT; i++) {
+        std::string sec = "preview" + std::to_string(i);
+        const PreviewProfile& p = m_PreviewProfiles[i];
+        THIS_CFG.SetInt("preview", sec + "_maxWidth",    p.maxWidth);
+        THIS_CFG.SetInt("preview", sec + "_jpegQuality", p.jpegQuality);
+    }
+}
+
+const PreviewProfile& CMy2015RemoteDlg::GetPreviewProfileCfg(int level) const
+{
+    if (level < 0 || level >= QUALITY_COUNT)
+        return GetScreenPreviewProfile(level);   // 越界：与 common 默认表同源兜底
+    return m_PreviewProfiles[level];
+}
+
+void CMy2015RemoteDlg::OnPreviewLevels()
+{
+    CPreviewLevelsDlg dlg(m_PreviewProfiles, this);
+    if (dlg.DoModal() == IDOK) {
+        SavePreviewProfilesToCfg();
+        MessageBoxL("预览质量等级已保存，下次发送预览时生效。", "提示", MB_ICONINFORMATION);
+    }
+}
+
 void CMy2015RemoteDlg::ApplyThumbnailSettings()
 {
     // 任何已缓存的 HBITMAP 都是按"旧 ThumbWidth"渲染的，尺寸不再可信 —— 一律清空。

server/2015Remote/2015RemoteDlg.h

@@ -338,6 +338,15 @@ public:
     void SaveQualityProfilesToCfg() const;                // m_QualityProfiles 落盘到 THIS_CFG
     const QualityProfile& GetQualityProfileCfg(int level) const;  // 供 ScreenSpyDlg 下发用
     void OnQualityLevels();                               // 高级→远程桌面质量等级
+
+    // ===== 屏幕预览质量等级配置（6 档 PreviewProfile） =====
+    // 双击主机单发预览 / 循环快照浮窗所用。持久化走 THIS_CFG [preview] 节。
+    // 仅 UI 线程访问；修改后下次发预览请求即生效。
+    PreviewProfile m_PreviewProfiles[QUALITY_COUNT];
+    void LoadPreviewProfilesFromCfg();                    // 从 THIS_CFG 读到 m_PreviewProfiles（缺省回落 GetScreenPreviewProfile）
+    void SavePreviewProfilesToCfg() const;                // m_PreviewProfiles 落盘到 THIS_CFG
+    const PreviewProfile& GetPreviewProfileCfg(int level) const;  // 供 ChooseScreenPreviewParams 用
+    void OnPreviewLevels();                               // 高级→屏幕预览质量等级
     void SendThumbnailRequest(class context* ctx);// 发一次缩略图请求
     void CacheThumbnail(uint64_t clientID, const BYTE* jpeg, size_t bytes);
     void ClearThumbnailCacheEntry(uint64_t clientID);

server/2015Remote/CPreviewLevelsDlg.h

@@ -0,0 +1,121 @@
+// CPreviewLevelsDlg.h
+// 屏幕预览质量等级配置对话框：编辑 6 档 PreviewProfile（编码宽度 / JPEG 质量）。
+// 纯主控端 UI 偏好，持久化由 CMy2015RemoteDlg::SavePreviewProfilesToCfg() 负责。
+// 仅在 2015RemoteDlg.cpp 中 include 一次（头文件内联实现，勿多处包含）。
+#pragma once
+
+#include "LangManager.h"
+
+class CPreviewLevelsDlg : public CDialog
+{
+public:
+    enum { IDD = IDD_PREVIEW_LEVELS };
+
+    // profiles: 指向 6 元素 PreviewProfile 数组，确认后写回
+    CPreviewLevelsDlg(PreviewProfile* profiles, CWnd* pParent = NULL)
+        : CDialog(CPreviewLevelsDlg::IDD, pParent), m_profiles(profiles)
+    {
+    }
+
+protected:
+    PreviewProfile* m_profiles;
+    PreviewProfile  m_working[QUALITY_COUNT];
+
+    static const char* LevelName(int i)
+    {
+        static const char* names[QUALITY_COUNT] = {
+            "Ultra", "High", "Good", "Medium", "Low", "Minimal"
+        };
+        return (i >= 0 && i < QUALITY_COUNT) ? names[i] : "?";
+    }
+
+    void LoadToControls()
+    {
+        CString s;
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            s.Format(_T("%d"), m_working[i].maxWidth);
+            SetDlgItemText(IDC_PLEVEL_WIDTH + i, s);
+            s.Format(_T("%d"), m_working[i].jpegQuality);
+            SetDlgItemText(IDC_PLEVEL_QUALITY + i, s);
+        }
+    }
+
+    bool ReadInt(int id, int& out)
+    {
+        CString s;
+        GetDlgItemText(id, s);
+        s.Trim();
+        if (s.IsEmpty()) return false;
+
+        int v = 0;
+        for (int k = 0; k < s.GetLength(); k++) {
+            TCHAR ch = s[k];
+            if (ch < _T('0') || ch > _T('9')) return false;
+            v = v * 10 + (ch - _T('0'));
+        }
+        out = v;
+        return true;
+    }
+
+    bool ReadFromControls(CString& err)
+    {
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            int w, q;
+            if (!ReadInt(IDC_PLEVEL_WIDTH + i, w))
+            { err.Format(_T("等级 %s 的最大宽度不是有效数字"), LevelName(i)); return false; }
+            if (!ReadInt(IDC_PLEVEL_QUALITY + i, q))
+            { err.Format(_T("等级 %s 的 JPEG 质量不是有效数字"), LevelName(i)); return false; }
+
+            if (w < 64 || w > 2560)
+            { err.Format(_T("等级 %s 的最大宽度需在 64~2560 之间"), LevelName(i)); return false; }
+            if (q < 1 || q > 100)
+            { err.Format(_T("等级 %s 的 JPEG 质量需在 1~100 之间"), LevelName(i)); return false; }
+
+            m_working[i].maxWidth    = w;
+            m_working[i].jpegQuality = q;
+        }
+        return true;
+    }
+
+    void ResetToDefaults()
+    {
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            m_working[i] = GetScreenPreviewProfile(i);
+        }
+        LoadToControls();
+    }
+
+    virtual BOOL OnInitDialog() override
+    {
+        CDialog::OnInitDialog();
+
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            m_working[i] = m_profiles[i];
+        }
+        LoadToControls();
+        TranslateDialog(this);
+        return TRUE;
+    }
+
+    virtual void OnOK() override
+    {
+        CString err;
+        if (!ReadFromControls(err)) {
+            MessageBox(err, _TR("提示"), MB_ICONWARNING);
+            return;
+        }
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            m_profiles[i] = m_working[i];
+        }
+        CDialog::OnOK();
+    }
+
+    virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam) override
+    {
+        if (LOWORD(wParam) == IDC_PLEVEL_RESET && HIWORD(wParam) == BN_CLICKED) {
+            ResetToDefaults();
+            return TRUE;
+        }
+        return CDialog::OnCommand(wParam, lParam);
+    }
+};

server/2015Remote/lang/de_DE.ini

@@ -2042,3 +2042,8 @@ Minimal
 最大宽度 0 表示原始分辨率；DIFF/RGB565 适合局域网，H264 适合跨网=Max. Breite 0 = Originalaufloesung; DIFF/RGB565 fuer LAN, H264 fuer WAN
 恢复默认=Standard
 质量等级已保存，下次打开远程桌面时生效。=Qualitaetsstufen gespeichert. Wirksam beim naechsten Oeffnen des Remote Desktops.
+屏幕预览质量等级(&P)=Vorschau &Qualitaetsstufen
+屏幕预览质量等级=Vorschau Qualitaetsstufen
+JPEG质量=JPEG Qualitaet
+最大宽度为期望编码宽度；JPEG 质量 1~100=Max. Breite ist die Ziel-Codierbreite; JPEG Qualitaet 1~100
+预览质量等级已保存，下次发送预览时生效。=Vorschau-Qualitaetsstufen gespeichert. Wirksam bei der naechsten Vorschau.

server/2015Remote/lang/en_US.ini

@@ -2042,3 +2042,8 @@ Minimal
 最大宽度 0 表示原始分辨率；DIFF/RGB565 适合局域网，H264 适合跨网=Max Width 0 = native resolution; DIFF/RGB565 for LAN, H264 for WAN
 恢复默认=Restore Defaults
 质量等级已保存，下次打开远程桌面时生效。=Quality levels saved. They take effect the next time you open Remote Desktop.
+屏幕预览质量等级(&P)=Screen Preview &Quality Levels
+屏幕预览质量等级=Screen Preview Quality Levels
+JPEG质量=JPEG Quality
+最大宽度为期望编码宽度；JPEG 质量 1~100=Max width is the target encode width; JPEG quality 1~100
+预览质量等级已保存，下次发送预览时生效。=Preview quality levels saved. They take effect the next time a preview is sent.

server/2015Remote/lang/zh_TW.ini

@@ -2033,3 +2033,8 @@ Minimal
 最大宽度 0 表示原始分辨率；DIFF/RGB565 适合局域网，H264 适合跨网=最大寬度 0 = 原始解析度；DIFF/RGB565 適合區域網路，H264 適合跨網
 恢复默认=恢復預設
 质量等级已保存，下次打开远程桌面时生效。=品質等級已儲存，下次開啟遠端桌面時生效。
+屏幕预览质量等级(&P)=螢幕預覽品質等級(&P)
+屏幕预览质量等级=螢幕預覽品質等級
+JPEG质量=JPEG品質
+最大宽度为期望编码宽度；JPEG 质量 1~100=最大寬度為期望編碼寬度；JPEG 品質 1~100
+预览质量等级已保存，下次发送预览时生效。=預覽品質等級已儲存，下次傳送預覽時生效。

server/2015Remote/resource.h

@@ -354,6 +354,7 @@
 #define IDC_DOT                         2036
 #define IDD_AUDIO                       2038
 #define IDD_QUALITY_LEVELS              3000
+#define IDD_PREVIEW_LEVELS              3001
 #define IDI_AUDIO                       2039
 #define IDC_LIST_REMOTE                 2040
 #define IDC_LIST_LOCAL                  2041
@@ -1038,19 +1039,23 @@
 #define ID_ONLINE_HISTORY_ACTIVITY      33082
 #define ID_EXIT_FULLSCREEN              40001
 #define ID_TOOL_QUALITY_LEVELS          33083
+#define ID_TOOL_PREVIEW_LEVELS          33084
 #define IDC_QLEVEL_FPS                  2547
 #define IDC_QLEVEL_WIDTH                2553
 #define IDC_QLEVEL_ALGO                 2559
 #define IDC_QLEVEL_BITRATE              2565
 #define IDC_QLEVEL_RESET                2571
+#define IDC_PLEVEL_WIDTH                2572
+#define IDC_PLEVEL_QUALITY              2578
+#define IDC_PLEVEL_RESET                2584
 
 // Next default values for new objects
 // 
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        401
-#define _APS_NEXT_COMMAND_VALUE         33083
+#define _APS_NEXT_COMMAND_VALUE         33085
-#define _APS_NEXT_CONTROL_VALUE         2542
+#define _APS_NEXT_CONTROL_VALUE         2585
 #define _APS_NEXT_SYMED_VALUE           105
 #endif
 #endif