fix(web): remove redundant nginx /api/ proxy block

API routing is handled exclusively by HTTPRoute in K8s. The nginx
/api/ proxy block was never hit in those environments and creates
architectural confusion.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/nginx.conf

@@ -9,15 +9,6 @@ server {
         add_header Cache-Control "public, immutable";
     }
 
-    # Proxy API calls to the API service
-    location /api/ {
-        proxy_pass http://api:3000/api/;
-        proxy_http_version 1.1;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    }
-
     # SPA fallback — serve index.html for all routes
     location / {
         try_files $uri $uri/ /index.html;