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。