Feature: Add configurable remote-desktop quality levels menu

Add an "高级 (Advanced)" menu after "其他 (Other)" whose
"远程桌面质量等级 (Remote Desktop Quality Levels)" item opens a dialog to
edit the six preset QualityProfile levels (max FPS, max width, codec
algorithm, bitrate). 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 [quality] INI section.

The server stays authoritative: LoadQualityProfilesFromCfg loads the saved
levels at startup (falling back to GetQualityProfile defaults), and
ScreenSpyDlg now sends CMD_QUALITY_PROFILES from GetQualityProfileCfg so
new remote-desktop sessions transmit with the configured parameters. Added
en_US/de_DE/zh_TW translations for the menu and dialog strings.

Co-Authored-By: deepseek-v4-pro

server/2015Remote/QualityLevelsDlg.h

@@ -0,0 +1,156 @@
+// QualityLevelsDlg.h
+// 远程桌面质量等级配置对话框：编辑 6 档 QualityProfile（帧率/宽度/算法/码率）。
+// 纯主控端 UI 偏好，持久化由 CMy2015RemoteDlg::SaveQualityProfilesToCfg() 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 CQualityLevelsDlg : public CDialog
+{
+public:
+    enum { IDD = IDD_QUALITY_LEVELS };
+
+    // profiles: 指向 6 元素 QualityProfile 数组，确认后写回
+    CQualityLevelsDlg(QualityProfile* profiles, CWnd* pParent = NULL)
+        : CDialog(CQualityLevelsDlg::IDD, pParent), m_profiles(profiles)
+    {
+    }
+
+protected:
+    QualityProfile* m_profiles;
+    QualityProfile  m_working[QUALITY_COUNT];
+
+    static const char* AlgorithmName(int algo)
+    {
+        switch (algo) {
+            case ALGORITHM_GRAY:   return "GRAY";
+            case ALGORITHM_DIFF:   return "DIFF";
+            case ALGORITHM_H264:   return "H264";
+            case ALGORITHM_RGB565: return "RGB565";
+            default:               return "?";
+        }
+    }
+
+    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 FillAlgoCombo(int i)
+    {
+        CComboBox* cb = (CComboBox*)GetDlgItem(IDC_QLEVEL_ALGO + i);
+        if (!cb) return;
+        for (int a = 0; a < 4; a++) {
+            cb->AddString(CString(AlgorithmName(a)));
+        }
+        cb->SetCurSel(m_working[i].algorithm);
+    }
+
+    void LoadToControls()
+    {
+        CString s;
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            s.Format(_T("%d"), m_working[i].maxFPS);
+            SetDlgItemText(IDC_QLEVEL_FPS + i, s);
+            s.Format(_T("%d"), m_working[i].maxWidth);
+            SetDlgItemText(IDC_QLEVEL_WIDTH + i, s);
+            s.Format(_T("%d"), m_working[i].bitRate);
+            SetDlgItemText(IDC_QLEVEL_BITRATE + i, s);
+            FillAlgoCombo(i);
+        }
+    }
+
+    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 fps, w, br;
+            if (!ReadInt(IDC_QLEVEL_FPS + i, fps))
+            { err.Format(_T("等级 %s 的帧率不是有效数字"), LevelName(i)); return false; }
+            if (!ReadInt(IDC_QLEVEL_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_QLEVEL_BITRATE + i, br))
+            { err.Format(_T("等级 %s 的码率不是有效数字"), LevelName(i)); return false; }
+
+            if (fps < 1 || fps > 60)
+            { err.Format(_T("等级 %s 的帧率需在 1~60 之间"), LevelName(i)); return false; }
+            if (w < 0 || w > 8192)
+            { err.Format(_T("等级 %s 的最大宽度需在 0~8192 之间（0=原始分辨率）"), LevelName(i)); return false; }
+            if (br < 0 || br > 50000)
+            { err.Format(_T("等级 %s 的码率需在 0~50000 之间"), LevelName(i)); return false; }
+
+            CComboBox* cb = (CComboBox*)GetDlgItem(IDC_QLEVEL_ALGO + i);
+            int algo = cb ? cb->GetCurSel() : -1;
+            if (algo < 0 || algo > 3)
+            { err.Format(_T("等级 %s 的编码算法未选择"), LevelName(i)); return false; }
+
+            m_working[i].maxFPS    = fps;
+            m_working[i].maxWidth  = w;
+            m_working[i].bitRate   = br;
+            m_working[i].algorithm = algo;
+        }
+        return true;
+    }
+
+    void ResetToDefaults()
+    {
+        for (int i = 0; i < QUALITY_COUNT; i++) {
+            m_working[i] = GetQualityProfile(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_QLEVEL_RESET && HIWORD(wParam) == BN_CLICKED) {
+            ResetToDefaults();
+            return TRUE;
+        }
+        return CDialog::OnCommand(wParam, lParam);
+    }
+};