Initial commit - SoundWave v1.0

- Full PWA support with offline capabilities
- Comprehensive search across songs, playlists, and channels
- Offline playlist manager with download tracking
- Pre-built frontend for zero-build deployment
- Docker-based deployment with docker compose
- Material-UI dark theme interface
- YouTube audio download and management
- Multi-user authentication support

backend/common/models.py

@@ -0,0 +1,5 @@
+"""Common models - shared across apps"""
+
+from django.db import models
+
+# No models in common app - it provides shared utilities