Implement server running preference and cleanup on exit

- Added `setKeepServerRunning` function to manage server persistence on app close.
- Integrated server running preference in `ConnectionForm` and synced settings on app startup.
- Enhanced server management in `main.rs` to handle orphaned processes based on user preference.
- Improved cleanup logic to ensure proper termination of server processes when not set to keep running.

app/src/App.tsx

@@ -15,7 +15,8 @@ import { Toaster } from '@/components/ui/toaster';
 import { ProfileList } from '@/components/VoiceProfiles/ProfileList';
 import { useModelDownloadToast } from '@/lib/hooks/useModelDownloadToast';
 import { MODEL_DISPLAY_NAMES, useRestoreActiveTasks } from '@/lib/hooks/useRestoreActiveTasks';
-import { isMacOS, isTauri, setupWindowCloseHandler, startServer } from '@/lib/tauri';
+import { isMacOS, isTauri, setupWindowCloseHandler, startServer, setKeepServerRunning } from '@/lib/tauri';
+import { useServerStore } from '@/stores/serverStore';
 
 // Track if server is starting to prevent duplicate starts
 let serverStarting = false;
@@ -51,6 +52,16 @@ function App() {
   // Monitor active downloads/generations and show toasts for them
   const activeDownloads = useRestoreActiveTasks();
 
+  // Sync stored setting to Rust on startup
+  useEffect(() => {
+    if (isTauri()) {
+      const keepRunning = useServerStore.getState().keepServerRunningOnClose;
+      setKeepServerRunning(keepRunning).catch((error) => {
+        console.error('Failed to sync initial setting to Rust:', error);
+      });
+    }
+  }, []);
+
   // Setup window close handler and auto-start server when running in Tauri (production only)
   useEffect(() => {
     if (!isTauri()) {