refactor(settings): rename Dock setting to system tray (showInDock → showInTray)

- compat: map legacy showInDock to showInTray when loading settings
- ui(copy): clarify “system tray (menu bar)” vs Dock in SettingsModal
- tauri(settings): return showInTray in get_settings; adjust default fallback
- docs(comment): align comments to “system tray” terminology across code
- note: no functional change yet; tray visibility toggle remains unimplemented

src/components/SettingsModal.tsx

@@ -19,7 +19,7 @@ interface SettingsModalProps {
 
 export default function SettingsModal({ onClose }: SettingsModalProps) {
   const [settings, setSettings] = useState<Settings>({
-    showInDock: true,
+    showInTray: true,
   });
   const [configPath, setConfigPath] = useState<string>("");
   const [version, setVersion] = useState<string>("");
@@ -49,8 +49,11 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
   const loadSettings = async () => {
     try {
       const loadedSettings = await window.api.getSettings();
-      if (loadedSettings?.showInDock !== undefined) {
-        setSettings({ showInDock: loadedSettings.showInDock });
+      if ((loadedSettings as any)?.showInTray !== undefined) {
+        setSettings({ showInTray: (loadedSettings as any).showInTray });
+      } else if ((loadedSettings as any)?.showInDock !== undefined) {
+        // 向后兼容：若历史上有 showInDock，则映射为 showInTray
+        setSettings({ showInTray: (loadedSettings as any).showInDock });
       }
     } catch (error) {
       console.error("加载设置失败:", error);
@@ -171,20 +174,21 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
 
         {/* 设置内容 */}
         <div className="px-6 py-4 space-y-6">
-          {/* 显示设置 - 功能还未实现 */}
+          {/* 系统托盘设置（未实现）
+              说明：此开关用于控制是否在系统托盘/菜单栏显示应用图标。 */}
           {/* <div>
             <h3 className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-3">
-              显示设置
+              显示设置（系统托盘）
             </h3>
             <label className="flex items-center justify-between">
               <span className="text-sm text-gray-500">
-                在 Dock 中显示（macOS）
+                在菜单栏显示图标（系统托盘）
               </span>
               <input
                 type="checkbox"
-                checked={settings.showInDock}
+                checked={settings.showInTray}
                 onChange={(e) =>
-                  setSettings({ ...settings, showInDock: e.target.checked })
+                  setSettings({ ...settings, showInTray: e.target.checked })
                 }
                 className="w-4 h-4 text-blue-500 rounded focus:ring-blue-500/20"
               />