docs: update nginx config with /api/ proxy and rewrite rules

deploy/README.md

@@ -49,14 +49,29 @@ powershell -File deploy\package.ps1
 ### 3. Nginx 反向代理
 
 ```nginx
-# 前端
+# 前端（静态文件 + Vue Router）
-location /publish_dishboard {
+location /publish_dishboard/ {
-    proxy_pass http://127.0.0.1:30080/;
+    rewrite ^/publish_dishboard(/.*)$ $1 break;
+    proxy_pass http://127.0.0.1:30080;
 }
 
 # 后端 API
-location /publish_server {
+location /publish_server/ {
-    proxy_pass http://127.0.0.1:30081/;
+    rewrite ^/publish_server(/.*)$ $1 break;
+    proxy_pass http://127.0.0.1:30081;
+}
+
+# API 代理（前端 useApi.js 的 baseURL: '/api'）
+location /api/ {
+    rewrite ^/api/(.*) /api/$1 break;
+    proxy_pass http://127.0.0.1:30081;
+}
+
+# 静态资源（前端 assets）
+location /assets/ {
+    alias /usr/local/publish_dishboard/frontend/assets/;
+    expires 30d;
+    add_header Cache-Control "public, immutable";
 }
 ```