Handle ExitRequested to stop sidecar on macOS Cmd+Q

On macOS, Cmd+Q triggers ExitRequested before Exit. If the app is
force-quit or closed via Cmd+Q, the Exit event may not fire,
leaving the sidecar process orphaned with ports 8080/8081 in use.

Now handles both ExitRequested and Exit to ensure the sidecar is
always stopped when the app closes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -74,8 +74,8 @@ pub fn run() {
         .build(tauri::generate_context!())
         .expect("error while building tauri application")
         .run(|app, event| {
-            if let tauri::RunEvent::Exit = event {
-                // Stop the sidecar when the app exits
+            match event {
+                tauri::RunEvent::Exit => {
                     if let Some(state) = app.try_state::<sidecar::ManagedSidecar>() {
                         if let Ok(mut mgr) = state.0.lock() {
                             eprintln!("[app] Stopping sidecar on exit...");
@@ -83,5 +83,16 @@ pub fn run() {
                         }
                     }
                 }
+                tauri::RunEvent::ExitRequested { .. } => {
+                    // Also stop sidecar on exit request (Cmd+Q on macOS)
+                    if let Some(state) = app.try_state::<sidecar::ManagedSidecar>() {
+                        if let Ok(mut mgr) = state.0.lock() {
+                            eprintln!("[app] Stopping sidecar on exit request...");
+                            mgr.stop();
+                        }
+                    }
+                }
+                _ => {}
+            }
         });
 }