Add edit_on_player_enabled feature for playlist content

- Added edit_on_player_enabled column to playlist_content table
- Updated playlist model to track edit enablement per content item
- Added UI checkbox on upload media page to enable/disable editing
- Added toggle column on manage playlist page for existing content
- Updated API endpoint to return edit_on_player_enabled flag to players
- Fixed docker-entrypoint.sh to use production config
- Supports PDF, Images, and PPTX content types

app/blueprints/api.py

@@ -401,7 +401,8 @@ def get_cached_playlist(player_id: int) -> List[Dict]:
             'duration': content._playlist_duration or content.duration or 10,
             'position': content._playlist_position or idx,
             'url': content_url,  # Full URL for downloads
-            'description': content.description
+            'description': content.description,
+            'edit_on_player_enabled': getattr(content, '_playlist_edit_on_player_enabled', False)
         })
     
     return playlist_data