major bug fixes

lib/state/remote_providers.dart

@@ -209,10 +209,12 @@ class RemoteControlController extends StateNotifier<RemoteControlState> {
 
     _statusSub = session.status.listen((st) {
       _update((s) => s.copyWith(status: st));
-      // Any terminal status drops us back to local playback.
-      if (st == RemoteConnStatus.disconnected ||
-          st == RemoteConnStatus.error ||
-          st == RemoteConnStatus.denied) {
+      // Only a terminal status drops us back to local playback. Transient
+      // drops (phone locked, Wi-Fi blip) are healed inside the session, which
+      // retries and re-emits `connecting` — we stay attached (bug-fixes #5).
+      // `denied` is a hard rejection; `error` here only means a device that
+      // never answered the initial dial.
+      if (st == RemoteConnStatus.denied || st == RemoteConnStatus.error) {
         // Defer so we're not tearing the session down inside its own callback.
         scheduleMicrotask(detach);
       }
@@ -225,6 +227,13 @@ class RemoteControlController extends StateNotifier<RemoteControlState> {
     await session.connect();
   }
 
+  /// Re-establish a dropped remote session immediately when the app returns to
+  /// the foreground. A controller is suspended while the phone is locked, so
+  /// its socket to the host is usually dead on resume; without this nudge the
+  /// user would wait out the reconnect backoff before control is restored
+  /// (bug-fixes #5). No-op when playing locally.
+  void onResume() => _session?.reconnectNow();
+
   Future<void> detach() async {
     await _snapSub?.cancel();
     _snapSub = null;