feat(stream): update stream route to /api/stream and add sound to main playlist upon creation

app/services/stream_processing_service.py

@@ -451,6 +451,9 @@ class StreamProcessingService:
             db.session.add(sound)
             db.session.commit()
 
+            # Add sound to main playlist
+            cls._add_sound_to_main_playlist(sound)
+
             return sound, None
 
         except Exception as e:
@@ -519,6 +522,25 @@ class StreamProcessingService:
 
         return urlparse(url).path.split("/")[-1] or "unknown"
 
+    @classmethod
+    def _add_sound_to_main_playlist(cls, sound: Sound) -> None:
+        """Add a sound to the main playlist."""
+        try:
+            from app.models.playlist import Playlist
+
+            # Find the main playlist
+            main_playlist = Playlist.find_main_playlist()
+            
+            if main_playlist:
+                # Add sound to the main playlist
+                main_playlist.add_sound(sound.id, commit=True)
+                logger.info(f"Added sound {sound.id} to main playlist")
+            else:
+                logger.warning("Main playlist not found - sound not added to any playlist")
+                
+        except Exception as e:
+            logger.error(f"Failed to add sound {sound.id} to main playlist: {e}")
+
     @classmethod
     def _calculate_file_hash(cls, file_path: str) -> str:
         """Calculate SHA256 hash of file."""