fix(nginx): 生产环境补全订单/渠道指引页 SPA 回退

/order/guide、/channel/* 刷新时被 API 反代导致 404；与 nginx-docker.conf 对齐。

Co-authored-by: Cursor <cursoragent@cursor.com>

nginx-default.conf

@@ -104,6 +104,9 @@ server {
     }
 
     # ============ 订单前端路由（^~ 须比下方 /order/ API 正则代理更优先）============
+    location ^~ /order/guide {
+        try_files /index.html =200;
+    }
     location ^~ /order/priceCheck {
         try_files /index.html =200;
     }
@@ -120,6 +123,41 @@ server {
         try_files /index.html =200;
     }
 
+    # ============ 渠道前端路由（^~ 须比下方 /channel/ API 正则代理更优先）============
+    location ^~ /channel/guide {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/salesProducts {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/serviceChannels {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/priceArea {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/blacklist {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/remoteZones {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/weightRules {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/weightRounding {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/autoTrigger {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/issueTemplate {
+        try_files /index.html =200;
+    }
+    location ^~ /channel/labelDesign {
+        try_files /index.html =200;
+    }
+
     # ============ 系统管理前端路由（^~ 须比下方 /system/ API 正则代理更优先）============
     # 页面路径为 camelCase；API 为 kebab（如 /system/dict/list、/system/batch-email/…），勿用宽泛前缀匹配 dict
     location = /system/dict {