release: v1.2.8 — 双域名保存确认与 clear-domains 恢复

启用双域名时以确认框提示锁死风险与恢复方式，不再强制校验 Host。
新增 clear-domains 运维 CLI 与相关文档。

docs-site/en/guide/changelog.md

@@ -4,6 +4,20 @@ Version history and notable changes. The full log is also in the repo root [CHAN
 
 ---
 
+## [1.2.8] — 2026-09-04
+
+### Improved
+
+- **Dual-domain**: confirm dialog on save/setup with lockout risks and `clear-domains` recovery; no longer blocks save based on current Host
+
+### Added
+
+- **Ops CLI**: `clear-domains` clears site/image URL settings from DB (`docker exec pichost clear-domains`)
+
+### Docs
+
+- FAQ and dual-domain / reverse-proxy guides updated with recovery steps
+
 ## [1.2.7] — 2026-09-03
 
 ### Added