fix(mindspace): edit_file 落盘、Finish 聊天 merge 与回归守卫

- finish-sync 支持 edit_file 覆盖 public HTML
- Finish 同步 merge 本地流式消息，剥离 agent 内部前缀
- 新增 verify:mindspace-publish-guards 与 AGENTS.md 跨工具说明
- 发版脚本接入回归门禁；103 runtime 发布含备份回退

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

policies.mjs

@@ -207,6 +207,7 @@ const USER_API_ALLOWLIST = [
   { method: 'POST', pattern: /^\/agent\/resume$/ },
   { method: 'POST', pattern: /^\/agent\/runs$/ },
   { method: 'GET', pattern: /^\/agent\/runs\/[^/]+$/ },
+  { method: 'GET', pattern: /^\/agent\/runs\/[^/]+\/events$/ },
   { method: 'GET', pattern: /^\/sessions$/ },
   { method: 'GET', pattern: /^\/sessions\/[^/]+$/ },
   { method: 'DELETE', pattern: /^\/sessions\/[^/]+$/ },