fix(extensions-portal): increase install timeout and nginx proxy_read_timeout

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yasinBursali

dream-server/extensions/services/dashboard/nginx.conf

@@ -27,6 +27,7 @@ server {
         proxy_set_header Connection "close";
         # B1 fix: Auth header injected by entrypoint.sh after reading key from file/env
         proxy_set_header Authorization "Bearer ${DASHBOARD_API_KEY}";
+        proxy_read_timeout 180s;
     }
 
     # Cache static assets

dream-server/extensions/services/dashboard/src/pages/Extensions.jsx

@@ -97,7 +97,7 @@ export default function Extensions() {
         : `/api/extensions/${serviceId}/${action}`
       const res = await fetch(url, {
         method: action === 'uninstall' ? 'DELETE' : 'POST',
-        signal: AbortSignal.timeout(15000),
+        signal: AbortSignal.timeout(120000),
       })
       if (!res.ok) {
         const err = await res.json().catch(() => ({}))