perf(nginx): 静态图/推广资源 Cache-Control 7d，index.html 禁止长期缓存

Made-with: Cursor

deploy/web/default.conf

@@ -17,27 +17,39 @@ server {
     add_header Cache-Control "public, immutable";
   }
 
+  # SPA 入口：勿长期缓存，否则发版后用户仍可能拿到旧 index
+  location = /index.html {
+    add_header Cache-Control "no-cache, no-store, must-revalidate";
+    expires -1;
+  }
+
   # web/public 挂载到 /var/www/yh-public：与 dist 根目录同 URL（如 /logo.png），优先读挂载，无则回退 dist
   location ~ ^/([^/]+\.(?:png|jpe?g|gif|ico|svg|webp|webmanifest))$ {
     root /var/www/yh-public;
     try_files /$1 @dist_root_public;
+    expires 7d;
+    add_header Cache-Control "public, max-age=604800";
   }
   location @dist_root_public {
     root /usr/share/nginx/html;
     try_files $uri =404;
+    expires 7d;
+    add_header Cache-Control "public, max-age=604800";
   }
 
   # web/public/social/ → 关注我们二维码等（挂载 /var/www/yh-public）
   location ^~ /social/ {
     alias /var/www/yh-public/social/;
-    add_header Cache-Control "public, max-age=300";
+    expires 7d;
+    add_header Cache-Control "public, max-age=604800";
   }
 
-  # 推广素材：文件必须真实存在，禁止落到 SPA index.html（否则前端误判「静态存在」、视频拿到 HTML）
-  # 宿主机 ./web/promotion 挂载覆盖本路径，改 social 下文件无需重新 npm build
+  # 推广素材：含视频/封面等大文件，浏览器可长期缓存减轻二次访问流量
+  # 宿主机 ./web/promotion 挂载覆盖本路径，改素材后依赖 max-age 到期或用户强刷
   location ^~ /promotion/ {
     try_files $uri =404;
-    add_header Cache-Control "public, max-age=86400";
+    expires 7d;
+    add_header Cache-Control "public, max-age=604800";
   }
 
   location = / {

nginx/web.conf

@@ -15,24 +15,35 @@ server {
         add_header Cache-Control "public, immutable";
     }
 
+    location = /index.html {
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        expires -1;
+    }
+
     # web/public 挂载 /var/www/yh-public；单段文件名同 dist 根 URL，优先挂载后回退 dist
     location ~ ^/([^/]+\.(?:png|jpe?g|gif|ico|svg|webp|webmanifest))$ {
         root /var/www/yh-public;
         try_files /$1 @dist_root_public;
+        expires 7d;
+        add_header Cache-Control "public, max-age=604800";
     }
     location @dist_root_public {
         root /usr/share/nginx/html;
         try_files $uri =404;
+        expires 7d;
+        add_header Cache-Control "public, max-age=604800";
     }
 
     location ^~ /social/ {
         alias /var/www/yh-public/social/;
-        add_header Cache-Control "public, max-age=300";
+        expires 7d;
+        add_header Cache-Control "public, max-age=604800";
     }
 
     location ^~ /promotion/ {
         try_files $uri =404;
-        add_header Cache-Control "public, max-age=86400";
+        expires 7d;
+        add_header Cache-Control "public, max-age=604800";
     }
 
     location = / {