fix(web): 关注我们图片多 URL 回退(public→promotion)，移除部署路径提示；Nginx 增加 /social/

Made-with: Cursor

nginx/web.conf

@@ -25,6 +25,11 @@ server {
         try_files $uri =404;
     }
 
+    location ^~ /social/ {
+        alias /var/www/yh-public/social/;
+        add_header Cache-Control "public, max-age=300";
+    }
+
     location ^~ /promotion/ {
         try_files $uri =404;
         add_header Cache-Control "public, max-age=86400";