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/ScreenSpyDlg.cpp

@@ -889,13 +889,17 @@ BOOL CScreenSpyDlg::OnInitDialog()
     // 启动传输速率更新定时器 (1秒)
     SetTimer(4, 1000, NULL);
 
-    // 下发质量配置表（让客户端可以持久化保存）
+    // 下发质量配置表（让客户端可以持久化保存）。
+    // 优先使用主控端在「高级 → 远程桌面质量等级」里自定义的档位；无主控端时回落内置默认表。
     {
         BYTE profileCmd[1 + sizeof(QualityProfile) * QUALITY_COUNT];
         profileCmd[0] = CMD_QUALITY_PROFILES;
         for (int i = 0; i < QUALITY_COUNT; i++) {
+            const QualityProfile& prof = (m_pParent != nullptr)
+                ? m_pParent->GetQualityProfileCfg(i)
+                : GetQualityProfile(i);
             memcpy(profileCmd + 1 + i * sizeof(QualityProfile),
-                   &GetQualityProfile(i), sizeof(QualityProfile));
+                   &prof, sizeof(QualityProfile));
         }
         m_ContextObject->Send2Client(profileCmd, sizeof(profileCmd));
     }