style edit

dashboard/nginx.conf

@@ -4,9 +4,17 @@ server {
   root /usr/share/nginx/html;
   index index.html;
 
-  # SPA fallback
+  # SPA fallback. index.html must always revalidate (no-cache = check the ETag on
+  # every load) — without it browsers heuristically cache it and keep referencing
+  # the PREVIOUS deploy's hashed bundles, forcing hard-refreshes after updates.
   location / {
     try_files $uri $uri/ /index.html;
+    add_header Cache-Control "no-cache";
+  }
+
+  # Hashed bundles are immutable — cache them hard.
+  location /assets/ {
+    add_header Cache-Control "public, max-age=31536000, immutable";
   }
 
   # Proxy API calls to the server container (same Docker network).