添加应用级别窗口按钮，以改善linux wayland下系统窗口按钮失效的问题 (#1119)

* feat(window): add app-level window controls with settings toggle

Add a persistent settings toggle to enable app-level minimize/maximize/close controls and hide system decorations when enabled, providing a Wayland-friendly fallback for broken native titlebar interactions.

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(window): restrict app-level window controls to Linux only and fix startup flicker

- Guard useAppWindowControls with isLinux() in App.tsx so it's always
  false on macOS/Windows even if persisted as true
- Wrap set_decorations call in lib.rs with #[cfg(target_os = "linux")]
- Only show the toggle in WindowSettings on Linux
- Skip setDecorations effect while settingsData is still loading to
  prevent the Rust-side decoration state from being overridden by the
  undefined->false fallback, which caused a brief title bar flicker

---------

Co-authored-by: wzk <wx13571681304@outlook.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Jason <farion1231@gmail.com>

src/components/settings/WindowSettings.tsx

@@ -3,6 +3,7 @@ import type { SettingsFormState } from "@/hooks/useSettings";
 import { AppWindow, MonitorUp, Power, EyeOff } from "lucide-react";
 import { ToggleRow } from "@/components/ui/toggle-row";
 import { AnimatePresence, motion } from "framer-motion";
+import { isLinux } from "@/lib/platform";
 
 interface WindowSettingsProps {
   settings: SettingsFormState;
@@ -75,6 +76,18 @@ export function WindowSettings({ settings, onChange }: WindowSettingsProps) {
             onChange({ minimizeToTrayOnClose: value })
           }
         />
+
+        {isLinux() && (
+          <ToggleRow
+            icon={<AppWindow className="h-4 w-4 text-amber-500" />}
+            title={t("settings.useAppWindowControls")}
+            description={t("settings.useAppWindowControlsDescription")}
+            checked={!!settings.useAppWindowControls}
+            onCheckedChange={(value) =>
+              onChange({ useAppWindowControls: value })
+            }
+          />
+        )}
       </div>
     </section>
   );