backup: 紫色UI换肤前完整备份（当前橙色逍遥梦主题）

保留改造前全部页面样式与功能代码，便于回滚。

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

app.json

@@ -13,6 +13,9 @@
         "pages/merchant-home/merchant-home",
         "pages/merchant-kefu-key/merchant-kefu-key",
         "pages/merchant-kefu-list/merchant-kefu-list",
+        "pages/staff-join/staff-join",
+        "pages/merchant-staff-audit/merchant-staff-audit",
+        "pages/merchant-staff-role/merchant-staff-role",
         "pages/manager/manager",
         "pages/orders/orders",
         "pages/order-detail/order-detail",