fix: restore mobile report scrolling and published product edits

Report pages now scroll inside the chat shell lock, and admin product save forks a draft or retires a published plan instead of rejecting with a generic constraint error.

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

frontend/src/lib/admin/admin-error-response.ts

@@ -31,9 +31,21 @@ export function adminErrorResponse(error: unknown) {
   if (message.includes("模型供应商密钥未配置") || message.includes("model_provider_key_required")) {
     return NextResponse.json({ error: "模型供应商密钥未配置" }, { status: 409 });
   }
+  if (message.includes("product_not_found")) {
+    return NextResponse.json({ error: "商品不存在" }, { status: 404 });
+  }
+  if (message.includes("product_code_immutable")) {
+    return NextResponse.json({ error: "商品代码不可修改" }, { status: 400 });
+  }
+  if (message.includes("product_draft_not_found")) {
+    return NextResponse.json({ error: "只能编辑草稿。已发布商品请下架，或保存为新版本草稿后再发布" }, { status: 400 });
+  }
   if (isPostgresError(error)) {
     if (error.code === "42501") return NextResponse.json({ error: "无权执行此操作" }, { status: 403 });
     if (error.code === "40001") return NextResponse.json({ error: "资源已被其他管理员修改，请刷新后重试" }, { status: 409 });
+    if (error.code === "23503") {
+      return NextResponse.json({ error: "已有订单或订阅引用该商品，不能硬删除，请改为下架" }, { status: 409 });
+    }
     if (error.code === "22023" || error.code === "23514" || error.code === "23505") {
       return NextResponse.json({ error: "提交内容不符合业务约束" }, { status: 400 });
     }