chore: align mvp design governance

- 统一 local-first MVP 后阶段架构口径，补充 process 执行总序和 Reasonix 协作记录

- 归档已完成的 design checklist，标注参考型 process，更新 AGENTS/REASONIX/架构文档

- 补充文件树/主编辑器下载与上下文菜单相关实现、bug 记录和 smoke 脚本

验证：git diff --check；codegraph sync .；cargo test -p mnote-web；node --check scripts/task476-filetree-editor-context-menu-download-smoke.js

design/10-review/process/14-sidex-workbench-gap-followup-review-v1.md

@@ -1,6 +1,8 @@
 # 14 Sidex / MNote Workbench Gap Follow-up Review v1
 
-> 状态：process
+> 状态：process-reference
+>
+> 归档说明（2026-05-21）：本 follow-up review 已拆分出 `5-24`、`5-25`、`5-26`、`4-45` 等执行项；本文保留为后续 workbench 对照参考，不作为直接执行清单。
 >
 > 日期：2026-05-21
 >
@@ -51,8 +53,8 @@ VSCode 的 Open Editors / Explorer / working copy / dirty indicator 是一条链
 
 拆为四个方向并行推进：
 
-- `design/05-editor-mainline/process/5-24-open-editors-lightweight-view-checklist-v1.md`
-- `design/05-editor-mainline/process/5-25-editor-tab-keyboard-and-mru-checklist-v1.md`
+- `design/05-editor-mainline/done/5-24-open-editors-lightweight-view-checklist-v1.md`
+- `design/05-editor-mainline/done/5-25-editor-tab-keyboard-and-mru-checklist-v1.md`
 - `design/05-editor-mainline/process/5-26-resource-open-resolver-convergence-checklist-v1.md`
 - `design/04-tree-domain/process/4-45-filetree-open-editors-lifecycle-link-checklist-v1.md`