feat: redesign Claw402 model config UI — friendly wallet setup, USDC guide, official logo, nginx no-cache for index.html

nginx/nginx.conf

@@ -15,11 +15,18 @@ server {
     gzip_min_length 1024;
     gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/javascript application/json;
 
+    # index.html — never cache (so new deploys take effect immediately)
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        add_header Expires 0;
+    }
+
     # Frontend routes (SPA) with static asset caching
     location / {
         try_files $uri $uri/ /index.html;
 
-        # Cache static assets
+        # Cache hashed static assets (js/css have content hashes in filenames)
         location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
             expires 1y;
             add_header Cache-Control "public, immutable";