Revert "fix: prevent orphaned gateway processes on Windows causing port conflcts and UI freeze (#570)"

This reverts commit 2dc1070213.

electron/main/index.ts

@@ -459,30 +459,15 @@ if (gotTheLock) {
     }
   });
 
-  let gatewayCleanedUp = false;
-
-  app.on('before-quit', (event) => {
+  app.on('before-quit', () => {
     setQuitting();
-
-    // On first before-quit, block the quit so we can await gateway cleanup.
-    // On Windows, fire-and-forget leaves orphaned Python/uv processes that
-    // hold port 18789, causing port conflicts on next launch.
-    if (!gatewayCleanedUp) {
-      gatewayCleanedUp = true;
-      event.preventDefault();
-
-      hostEventBus.closeAll();
-      hostApiServer?.close();
-
-      const stopPromise = gatewayManager.stop().catch((err) => {
-        logger.warn('gatewayManager.stop() error during quit:', err);
-      });
-      const timeoutPromise = new Promise<void>((resolve) => setTimeout(resolve, 5000));
-
-      void Promise.race([stopPromise, timeoutPromise]).then(() => {
-        app.exit(0);
-      });
-    }
+    hostEventBus.closeAll();
+    hostApiServer?.close();
+    // Fire-and-forget: do not await gatewayManager.stop() here.
+    // Awaiting inside before-quit can stall Electron's quit sequence.
+    void gatewayManager.stop().catch((err) => {
+      logger.warn('gatewayManager.stop() error during quit:', err);
+    });
   });
 }