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

frontend/public/avatars/preset_3.svg

@@ -0,0 +1,12 @@
+<svg width="200" height="200" viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
+  <!-- Background circle -->
+  <circle cx="100" cy="100" r="100" fill="#10B981"/>
+  
+  <!-- Microphone -->
+  <g fill="white">
+    <rect x="85" y="60" width="30" height="50" rx="15"/>
+    <path d="M 70 100 Q 70 130 100 130 Q 130 130 130 100" fill="none" stroke="white" stroke-width="6"/>
+    <rect x="95" y="130" width="10" height="30"/>
+    <rect x="75" y="155" width="50" height="8" rx="4"/>
+  </g>
+</svg>