docs: 全面按当前源码更新文档 + 删除已过时文档

## 删除（内容已落地/已被替换，保留只会误导）
- demo.md ................... failback 与 recoverydiag 均已实现，0 引用
- docs/defect-qq-output-send-loop.md .. 已修复（本身也标了「已修复」），0 引用
- docs/embedding-comparison.md ....... 一次性选型报告，仅被 agent 产物引用
- docs/zh/plan.md ............ 描述的旧 nav 布局已重写、死配置已清，全部完成
- docs/zh/plugin-migration-plan.md ... 迁移已上生产，纯过程稿（Part 0~6 全完成）

## 更新（按当前源码核对）
- assets/docs/{zh,en}/ARCHITECTURE.md（README 指向的用户文档，最重要）：
  把只讲 cancel/intercept 的旧「中断机制」章节重写为「输入调度器与中断机制」——
  补上两类别 + 四级中断（L1~L4，默认 L1、外部插件 L4 夹到 L3）+ 抢占/挂起/中断栈
  + 饥饿防护（PreemptCount 提升，封顶 L4）+ 抢占冷却（2s）+ 停止语义（cancelBudget）
  + 驻留子/分诊助手/残余任务；新增「上下文预算」章节（窗口 ≠ 工作面，600K 封顶，
  预算是上限非填充目标）。中英章节数现已对齐（各 13 节）。
- assets/docs/{zh,en}/PLUGIN_DEV.md：插件示例表补 6 个缺失项
  （acp/deepsearch/plugindev/recoverydiag/vanblog/vikunja）；qq 工具数 17 → 20（实测）。
- README.md / README_EN.md：补 v1.3.x 线（此前只到 v1.2.0，而 1.3.x 已发布 12 个 patch）——
  驻留式子 agent、输出通道寻址、输入调度器、轻量内核 profile、积压及时反馈。
- plan.md：开头两个「⚠️ 紧急/正在持续污染」是过期告警（实测  残留 = 0），
  改为「已解决」并加文档定位说明；§13 仍是活跃路线图故保留。
- docs/zh/plugin-interface-matrix.md + 两处源码注释：清理指向已删文档的断链。

全仓 md 断链检查：仅剩 1 处，位于 third_party 的 oh_modules（第三方依赖，非本项目）。

assets/docs/en/PLUGIN_DEV.md

@@ -804,7 +804,7 @@ Internal: records are stored in SQLite `disabled_plugins` table (`name`, `disabl
 |---------|------|----------|
 | [weather](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/weather) | Go | Weather queries (wttr.in); demonstrates NoMemory/Cleaner/stage hooks/channels/text memory |
 | [luademo](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/luademo) | Lua | Full-featured Lua example covering the whole v0.8.0 Lua SDK surface |
-| [qq](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/qq) | Go | NapCat OneBot integration, 17 tools, full input/output channel wiring |
+| [qq](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/qq) | Go | NapCat OneBot integration, 20 tools, full input/output channel wiring |
 | [memo](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/memo) | Go | Memo management, PreAction injection + timed interrupt dual reminder |
 | [files](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/files) | Go | File system operations, 4 write modes, sandbox isolation |
 | [browser](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/browser) | Go | Web search + HTTP fetch (SSRF) + Chromium render (merged from web/webfetch) |
@@ -817,6 +817,12 @@ Internal: records are stored in SQLite `disabled_plugins` table (`name`, `disabl
 | [rss](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/rss) | Go | RSS subscriptions |
 | [ai_image](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/ai_image) | Go | AI image generation |
 | [music](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/music) | Go | Music playback |
+| [vikunja](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/vikunja) | Go | Vikunja task management (projects/tasks/labels CRUD) |
+| [vanblog](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/vanblog) | Go | VanBlog publishing and management |
+| [deepsearch](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/deepsearch) | Go | Multi-round deep search (progressive focus + cited summary) |
+| [acp](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/acp) | Go | Agent Client Protocol (external editors/IDEs drive this agent) |
+| [recoverydiag](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/recoverydiag) | Go | Five-part fault diagnosis (triage / sqlite check / log signatures / diff / ranked conclusions); core plugin of failback mode |
+| [plugindev](https://gitcode.com/JianFeeeee/homeagent-sdk/tree/main/example/plugindev) | Go | Plugin scaffolding: generate, build, install — lets the agent develop plugins itself |
 
 ### Built-in Plugins