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/lib/realtime.ts

@@ -52,9 +52,10 @@ export interface RtSettingsData {
   brand_mark?: string;
   brand_logo_size?: string;
   brand_logo_fit?: string;
-  footer_links?: { label: string; url: string; new_tab: boolean }[];
+  footer_links?: { label: string; url: string; new_tab: boolean; align?: string }[];
   allow_register?: boolean;
   allow_comments?: boolean;
+  comments_require_login?: boolean;
   allow_messages?: boolean;
   post_cooldown_hours?: number;
   code_block_auto_fold?: boolean;