Implement Phase 2 asset storage pipeline

client/nginx.conf

@@ -10,6 +10,9 @@ server {
 
     root /usr/share/nginx/html;
     index index.html;
+    # Matches the default API allowance of twenty 25 MiB files plus multipart
+    # overhead. Keep this in sync if the backend upload limits are raised.
+    client_max_body_size 512m;
 
     resolver 127.0.0.11 valid=10s ipv6=off;
     set $api_origin http://api:7532;
@@ -17,6 +20,11 @@ server {
     location ~ ^/(api|health|media)(/|$) {
         proxy_pass $api_origin;
         proxy_http_version 1.1;
+        proxy_connect_timeout 5s;
+        # Multipart requests return only after image processing and private-S3
+        # writes complete. This is an inactivity timeout, not a size limit.
+        proxy_read_timeout 10m;
+        proxy_send_timeout 10m;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;