WIP: Fix play behaviour in track view

- Added wasPlayingRef to preserve playback state across version changes
- Auto-play new waveform if previous version was playing
- Ensure play/pause buttons work correctly after version switch
- Added WebSocket proxy configuration for real-time features

Fixes: Version switching now preserves playback state
Todo: Test edge cases and finalize implementation

web/nginx.conf

@@ -31,6 +31,22 @@ server {
         proxy_send_timeout 300s;
     }
 
+    # WebSocket proxy for real-time version room events
+    location /ws/ {
+        proxy_pass http://api:8000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+
+        # WebSocket specific headers
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_read_timeout 60s;
+        proxy_send_timeout 60s;
+    }
+
     # SPA routing — all other paths fall back to index.html
     location / {
         try_files $uri $uri/ /index.html;