fix: Bugs created after the overhaul, performance and layout fixes

nginx/nginx.conf

@@ -3,7 +3,7 @@ events {
 }
 
 http {
-    client_max_body_size 10m;
+    client_max_body_size 500m;
 
     server {
         listen 80;
@@ -35,6 +35,9 @@ http {
             proxy_set_header X-Forwarded-Proto $scheme;
             proxy_read_timeout 300s;
             proxy_send_timeout 300s;
+            # Do not buffer request bodies — stream them directly to backend.
+            # Required for large file uploads (client_max_body_size 500m above).
+            proxy_request_buffering off;
         }
 
         # WebSocket support for MQTT live data