ci: 完善 CI/CD 流程，添加实际生产部署工作流

frontend/nginx.prod.conf

@@ -0,0 +1,61 @@
+server {
+  listen 80;
+  server_name _;
+
+  # Allow large uploads (e.g. videos)
+  client_max_body_size 300m;
+
+  root /usr/share/nginx/html;
+  index index.html;
+
+  # SSE notification stream — must disable buffering for real-time push
+  location /notification/ {
+    proxy_pass http://backend:8080;
+    proxy_http_version 1.1;
+    proxy_set_header Connection '';
+    proxy_buffering off;
+    proxy_cache off;
+    proxy_set_header Host $http_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;
+    proxy_read_timeout 3600s;
+    proxy_send_timeout 3600s;
+  }
+
+  # Health check
+  location /healthz {
+    proxy_pass http://backend:8080;
+    proxy_http_version 1.1;
+    proxy_set_header Host $http_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;
+  }
+
+  # SPA routing (Vue Router history mode)
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+
+  # Reverse proxy to backend (strip /api prefix)
+  location /api/ {
+    proxy_pass http://backend:8080/;
+    proxy_http_version 1.1;
+    proxy_set_header Host $http_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;
+  }
+
+  # Serve uploaded files via backend static route
+  location /static/ {
+    proxy_pass http://backend:8080/static/;
+    proxy_http_version 1.1;
+    proxy_set_header Host $http_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;
+    proxy_buffering off;
+  }
+}