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/views.py

@@ -0,0 +1,23 @@
+"""Common views"""
+
+from rest_framework.permissions import IsAdminUser, IsAuthenticated
+from rest_framework.views import APIView
+
+
+class ApiBaseView(APIView):
+    """Base API view"""
+    pass
+
+
+class AdminOnly(IsAdminUser):
+    """Admin only permission"""
+    pass
+
+
+class AdminWriteOnly(IsAuthenticated):
+    """Allow all authenticated users to read and write their own data"""
+
+    def has_permission(self, request, view):
+        # All authenticated users can perform any action
+        # Data isolation is enforced at the view/queryset level via owner field
+        return request.user and request.user.is_authenticated