chore: document architecture gaps and add dev hot reload

- add npm dev:hot wrapper using cargo-watch and page reload polling

- add mnote-web dev hot reload endpoint and coverage

- record current architecture review and tracked bug findings across realtime, tree, editor, and AI runtimes

Verification:

- node scripts/task-dev-hot-plan-test.js

- node --check scripts/dev-hot.js

- cargo test -p mnote-web dev_hot -- --nocapture

design/10-review/README.md

@@ -6,6 +6,8 @@
 
 - [Kernel 架构收口与下一阶段优先级 Review / Checklist](./process/08-kernel-architecture-next-priority-review-and-checklist.md)
 - [页面 AI 快速块编辑 Runtime Review](./process/09-page-ai-fast-block-edit-runtime-review.md)
+- [当前 mnote 项目 AI / Page Aggregate 定向 Review](./process/10-current-mnote-ai-runtime-review-v1.md)
+- [当前完整架构 Review](./process/11-current-full-architecture-review-v1.md)
 
 最新归档审查：