update player with wachdog and intro

src/main.py

@@ -91,6 +91,19 @@ class ExitPasswordPopup(Popup):
         if entered_password == correct_password:
             # Password correct, exit app
             Logger.info("ExitPasswordPopup: Correct password, exiting app")
+            
+            # Create stop flag to prevent watchdog restart
+            stop_flag = os.path.join(
+                os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+                '.player_stop_requested'
+            )
+            try:
+                with open(stop_flag, 'w') as f:
+                    f.write('User requested exit via password')
+                Logger.info("ExitPasswordPopup: Stop flag created - watchdog will not restart")
+            except Exception as e:
+                Logger.warning(f"ExitPasswordPopup: Could not create stop flag: {e}")
+            
             self.dismiss()
             App.get_running_app().stop()
         else:
@@ -285,6 +298,7 @@ class SignagePlayer(Widget):
         self.playlists_dir = os.path.join(self.base_dir, 'playlists')
         self.config_file = os.path.join(self.config_dir, 'app_config.json')
         self.resources_path = os.path.join(self.config_dir, 'resources')
+        self.heartbeat_file = os.path.join(self.base_dir, '.player_heartbeat')
         # Create directories if they don't exist
         for directory in [self.config_dir, self.media_dir, self.playlists_dir]:
             os.makedirs(directory, exist_ok=True)
@@ -299,11 +313,22 @@ class SignagePlayer(Widget):
         self.controls_timer = None
         # Auto-hide controls
         self.schedule_hide_controls()
+        # Start heartbeat monitoring
+        Clock.schedule_interval(self.update_heartbeat, 10)  # Update every 10 seconds
 
     def _update_size(self, instance, value):
         self.size = value
         if hasattr(self, 'ids') and 'content_area' in self.ids:
             self.ids.content_area.size = value
+    
+    def update_heartbeat(self, dt):
+        """Update heartbeat file to indicate player is alive"""
+        try:
+            # Touch the heartbeat file to update its modification time
+            with open(self.heartbeat_file, 'w') as f:
+                f.write(str(time.time()))
+        except Exception as e:
+            Logger.warning(f"SignagePlayer: Failed to update heartbeat: {e}")
 
     def initialize_player(self, dt):
         """Initialize the player - load config and start playlist checking"""
@@ -983,4 +1008,17 @@ class SignagePlayerApp(App):
 
 
 if __name__ == '__main__':
-    SignagePlayerApp().run()
+    try:
+        Logger.info("=" * 80)
+        Logger.info("Starting Kivy Signage Player Application")
+        Logger.info("=" * 80)
+        SignagePlayerApp().run()
+    except KeyboardInterrupt:
+        Logger.info("Application stopped by user (Ctrl+C)")
+    except Exception as e:
+        Logger.critical(f"Fatal error in application: {e}")
+        Logger.exception("Full traceback:")
+        import sys
+        sys.exit(1)
+    finally:
+        Logger.info("Application shutdown complete")