完善站点运营设置：分路由管理、登录可见评论、邮件模板内联与关闭注册 SSR。

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

frontend/app/admin/settings/ModuleSettings.tsx

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+"use client";
+
+import { useState } from "react";
+import ConfirmDialog from "@/components/ConfirmDialog";
+import useUnsavedGuard from "@/hooks/useUnsavedGuard";
+import OperationsPanel, { type ModuleName } from "./OperationsPanel";
+
+/** 运营模块页：保存单元离开保护 */
+export default function ModuleSettings({ name }: { name: Exclude<ModuleName, "security"> }) {
+  const [dirty, setDirty] = useState(false);
+  const leave = useUnsavedGuard(dirty);
+
+  return (
+    <div className="admin-settings-stack">
+      <OperationsPanel name={name} onDirtyChange={setDirty} />
+      <ConfirmDialog
+        open={leave.leaveOpen}
+        title="有未保存的修改"
+        message="离开后，当前保存单元里尚未写入的修改会丢失。确定离开？"
+        confirmLabel="离开"
+        danger
+        onCancel={leave.cancelLeave}
+        onConfirm={leave.confirmLeave}
+      />
+    </div>
+  );
+}