update pay function

valuefrontier.conf

@@ -224,6 +224,21 @@ server {
       proxy_read_timeout 86400s;
     }
     # AI Chat 应用 (Next.js) - MCP 集成
+    # AI Chat 静态资源（图片、CSS、JS）
+    location ~ ^/ai-chat/(images|_next/static|_next/image|favicon.ico) {
+        proxy_pass http://127.0.0.1:3000;
+        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;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # 缓存设置
+        expires 30d;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # AI Chat 主应用
     location /ai-chat {
         proxy_pass http://127.0.0.1:3000/ai-chat;
         proxy_http_version 1.1;