refactor: remove unused remarks and add quick domain create

Drop remark fields from Zone, Zone domains, proxy routes, WAF rule
groups and IP groups across models, APIs, UI and DB columns (keep
certificate/origin remarks). Add quick-create domain input for short
labels, @ apex and full FQDNs when binding domains.

docs/changelog/index.md

@@ -37,6 +37,7 @@ sidebar: false
 ### 移除
 
 - 移除托管域名（managed-domains）管理 API 与前端 `WebsiteService`；请改用 Zone / Zone 域名 API。
+- 移除 Zone、Zone 域名、反代路由、WAF 规则组与 IP 组的备注字段（前后端与数据库列同步删除）；证书与源站备注保留。
 
 ### 修复