Corregge avvio RTMP bloccato dopo errore o cambio sessione.

Il motore Android ignorava startStream in CONNECTING/RECONNECTING; la camera
ora resetta prima di pubblicare. YouTube relay parte solo con overlay attivo.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/streams/youtube_relay.rb

@@ -57,6 +57,7 @@ module Streams
         return unless session.platform == "youtube"
         return if session.terminal?
         return if session.stream_key.blank?
+        return unless Streams::OverlayRelay.running?(session.id)
 
         return if running?(session.id)
 

backend/app/services/youtube/setup_broadcast.rb

@@ -33,7 +33,10 @@ module Youtube
         rtmp_url: broadcast[:rtmp_url]
       )
 
-      Streams::YoutubeRelay.start(@session)
+      # Relay solo quando _air pubblica (overlay pronto); altrimenti ffmpeg esce subito.
+      if Streams::OverlayRelay.running?(@session.id)
+        Streams::YoutubeRelay.start(@session)
+      end
       @session.stream_events.create!(
         event_type: "youtube_ready",
         metadata: { broadcast_id: broadcast[:broadcast_id] },

mobile/android/app/src/main/kotlin/com/matchlivetv/match_live_tv/StreamingEngine.kt

@@ -231,12 +231,17 @@ class StreamingEngine(
             notifyError("StreamingEngine rilasciato")
             return
         }
-        if (state == StreamingState.STREAMING ||
-            state == StreamingState.CONNECTING ||
-            state == StreamingState.RECONNECTING
+        // Già in onda sullo stesso endpoint RTMP.
+        if (state == StreamingState.STREAMING &&
+            config?.rtmpUrl == streamConfig.rtmpUrl &&
+            genericStream?.isStreaming == true
         ) {
             return
         }
+        // Nuova sessione o retry dopo errore: reset completo (evita startStream ignorato).
+        if (state != StreamingState.IDLE && state != StreamingState.PREVIEWING) {
+            stopStream()
+        }
 
         config = streamConfig
         lastError = null

mobile/lib/features/camera_mode/camera_screen.dart

@@ -165,7 +165,11 @@ class _CameraScreenState extends ConsumerState<CameraScreen> {
               fresh.status == 'live' ||
               fresh.status == 'reconnecting');
       if (shouldAutoPublish) {
-        await Future<void>.delayed(const Duration(milliseconds: 500));
+        // Reset motore nativo (sessione precedente / RECONNECTING blocca startStream).
+        try {
+          await StreamingChannel.stopStream();
+        } catch (_) {}
+        await Future<void>.delayed(const Duration(milliseconds: 400));
         final useFreshStart =
             justStartedSession || fresh.status == 'connecting';
         if (useFreshStart) {
@@ -497,6 +501,7 @@ class _CameraScreenState extends ConsumerState<CameraScreen> {
     _statsTimer?.cancel();
     _scorePullTimer?.cancel();
     _metricsSub?.cancel();
+    unawaited(StreamingChannel.stopStream());
     WakelockPlus.disable();
     _unlockOrientation();
     super.dispose();

mobile/lib/features/setup_wizard/step_network_test.dart

@@ -189,7 +189,7 @@ class _StepNetworkTestState extends ConsumerState<StepNetworkTest> {
 
       try {
         final ws = ref.read(websocketServiceProvider);
-        await ws.connect(sessionId: started.id, deviceRole: 'camera');
+        await ws.connect(sessionId: started.id, deviceRole: 'controller');
       } catch (e) {
         if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(