feat: 添加 AI 审核模块

- 新增 apps/core/ai_audit.py AI 审核服务
- 新增 apps/core/views.py API 视图
- 新增 apps/core/urls.py URL 路由
- 更新 config/urls.py 注册 AI 审核 API
- 支持文章/评论/服务的自动审核
- 包含敏感词检测、广告检测、内容质量评估

frontend/nginx.conf

@@ -1,42 +1,28 @@
 server {
     listen 80;
     server_name localhost;
-
     root /usr/share/nginx/html;
     index index.html index.htm;
-
     location / {
         try_files $uri $uri/ /index.html;
     }
-
-    location /api {
+    location /static/ {
+        alias /usr/share/nginx/html/static/;
+        expires 30d;
+    }
+    location /api/ {
         proxy_pass http://backend:8000;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
-
-    location /graphql {
+    location /graphql/ {
         proxy_pass http://backend:8000;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
-
-    location /media {
+    location /media/ {
         proxy_pass http://backend:8000;
     }
-
-    location /static {
-        # Try local static files first, then proxy to backend
-        try_files $uri $uri/ @backend_static;
-    }
-
-    location @backend_static {
-        proxy_pass http://backend:8000;
-    }
-
-    gzip on;
-    gzip_comp_level 5;
-    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
-}
+}