完善桌面壳托盘关闭行为

主窗口关闭在托盘可用时隐藏到托盘

托盘不可用时保持默认关闭避免窗口无法恢复

补充关闭策略检查测试和架构文档

apps/desktop-shell/scripts/check-config.mjs

@@ -143,6 +143,11 @@ const requiredMainSnippets = [
   'TRAY_MENU_QUIT',
   'show_main_window',
   'reload_main_window',
+  'register_desktop_window_close_events',
+  'resolve_desktop_window_close_action',
+  'WindowEvent::CloseRequested',
+  'api.prevent_close()',
+  'close_window.hide()',
   'desktop tray registration failed',
   '"appearance.getColorScheme"',
   '"app.lifecycle"',

apps/desktop-shell/src-tauri/src/main.rs

@@ -898,6 +898,12 @@ enum DesktopTrayAction {
     Ignore,
 }
 
+#[derive(Debug, PartialEq, Eq)]
+enum DesktopWindowCloseAction {
+    HideToTray,
+    CloseWindow,
+}
+
 fn resolve_desktop_tray_menu_action(menu_id: &str) -> DesktopTrayAction {
     match menu_id {
         TRAY_MENU_SHOW => DesktopTrayAction::ShowMainWindow,
@@ -918,6 +924,14 @@ fn resolve_desktop_tray_icon_action(
     }
 }
 
+fn resolve_desktop_window_close_action(tray_registered: bool) -> DesktopWindowCloseAction {
+    if tray_registered {
+        DesktopWindowCloseAction::HideToTray
+    } else {
+        DesktopWindowCloseAction::CloseWindow
+    }
+}
+
 fn show_main_window(app: &tauri::AppHandle) -> tauri::Result<()> {
     if let Some(window) = app.get_webview_window("main") {
         window.show()?;
@@ -984,6 +998,20 @@ fn register_desktop_tray(app: &tauri::App) -> tauri::Result<()> {
     Ok(())
 }
 
+fn register_desktop_window_close_events(window: &WebviewWindow, tray_registered: bool) {
+    let close_window = window.clone();
+    window.on_window_event(move |event| {
+        if let WindowEvent::CloseRequested { api, .. } = event {
+            if resolve_desktop_window_close_action(tray_registered)
+                == DesktopWindowCloseAction::HideToTray
+            {
+                api.prevent_close();
+                let _ = close_window.hide();
+            }
+        }
+    });
+}
+
 fn payload_string<'a>(value: &'a Value, field: &str) -> Option<&'a str> {
     value
         .get(field)
@@ -1447,13 +1475,18 @@ fn main() {
         .plugin(tauri_plugin_notification::init())
         .plugin(tauri_plugin_opener::init())
         .setup(|app| {
-            if let Err(error) = register_desktop_tray(app) {
-                eprintln!("desktop tray registration failed: {error}");
-            }
+            let tray_registered = match register_desktop_tray(app) {
+                Ok(()) => true,
+                Err(error) => {
+                    eprintln!("desktop tray registration failed: {error}");
+                    false
+                }
+            };
             let window_config = app.config().app.windows.get(0).cloned();
             if let Some(config) = window_config {
                 let window =
                     tauri::WebviewWindowBuilder::from_config(app.handle(), &config)?.build()?;
+                register_desktop_window_close_events(&window, tray_registered);
                 register_desktop_lifecycle_events(&window);
                 let _ = emit_desktop_lifecycle_event(&window, "active", true, "created");
                 let _ = register_desktop_network_events(&window);
@@ -1728,6 +1761,18 @@ mod tests {
         );
     }
 
+    #[test]
+    fn desktop_close_hides_to_tray_only_when_tray_is_registered() {
+        assert_eq!(
+            resolve_desktop_window_close_action(true),
+            DesktopWindowCloseAction::HideToTray
+        );
+        assert_eq!(
+            resolve_desktop_window_close_action(false),
+            DesktopWindowCloseAction::CloseWindow
+        );
+    }
+
     #[test]
     fn external_url_normalization_allows_only_safe_protocols() {
         assert_eq!(