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>

src/components/MindSpaceView.tsx

@@ -950,7 +950,6 @@ export function MindSpaceView({
     prevChatStateRef.current = chatState;
     const wasBusy = previous === 'streaming' || previous === 'waiting';
     if (!wasBusy || chatState !== 'idle' || !selectedPageId || previewMode || pageFullscreenPreviewOpen) return;
-    setPageRefreshTrigger((value) => value + 1);
     void refreshPagesSilently();
   }, [chatState, pageFullscreenPreviewOpen, previewMode, selectedPageId]);