feat: 接入内建 weixin channel(同 #301 重构版本) (#303)

* feat: 接入 weixin 服务层与命令入口

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* feat: 注册内建 weixin channel 插件

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: 修正 channel permission relay 路由与能力判定

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: 修复 builtin channel 的 ChannelsNotice 误报

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* docs: 补充内建 weixin channel 使用说明

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* docs: 更新微信 channel 接入计划状态

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: 延迟加载 weixin 登录二维码依赖

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: 改用 qrcode 生成 weixin 登录二维码

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: 修正 vite 构建的 Windows 路径解析

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* chore: 删除临时规划文档 wx_channel.md 并还原 package.json 排序

wx_channel.md 内容已整合到 docs/features/channels.md，不再需要。
package.json 中 @ant/model-provider 位置从原始位置被无意移动，还原。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 将 weixin 模块从 src/ 迁移至 packages/weixin 工作区包

将 src/services/weixin/ 中的纯业务逻辑迁入 @claude-code-best/weixin
workspace 包，降低 src/ 耦合度。仅保留 server.ts 作为薄适配层。

- 迁移 7 个无修改的纯模块 (types/api/accounts/login/pairing/media/send)
- monitor.ts 内联 PERMISSION_REPLY_RE 正则，解除对 src/ 的依赖
- permissions.ts 本地定义 ChannelPermissionRequestParams 接口
- cli.ts 拆分：serve 子命令通过回调注入，login/access 保留在包内
- server.ts 重写为从 @claude-code-best/weixin 导入
- 新增 cli-serve.ts 作为 serve 入口薄壳

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 修正 weixin barrel export 中 interface 的导出方式

ChannelPermissionRequestParams 是纯类型，必须用 export type 导出，
否则 Bun 运行时会报 "export not found" 错误。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: 将 server.ts 迁入 packages/weixin，彻底移除 src/services/weixin/

通过依赖注入（WeixinServerDeps）解耦 src/ 依赖（analytics、config、
MCP channel schema），server.ts 完全移入包内。cli.tsx 入口处一次性
注入所有依赖。

src/services/weixin/ 目录已完全删除。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 修复 markdownToPlainText 中代码块正则的 ReDoS 风险

用非正则的线性扫描替代 \`\`\`[\s\S]*?\n([\s\S]*?)\`\`\` 匹配，
避免在含有大量重复 \`\`\` 序列的输入上触发多项式回溯。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: 1111 <11111@asd.c>
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/weixin/src/__tests__/send.test.ts

@@ -0,0 +1,32 @@
+import { describe, expect, test } from 'bun:test'
+import { markdownToPlainText } from '../send.js'
+
+describe('markdownToPlainText', () => {
+  test('removes bold markers', () => {
+    expect(markdownToPlainText('**bold**')).toBe('bold')
+  })
+
+  test('removes italic markers', () => {
+    expect(markdownToPlainText('*italic*')).toBe('italic')
+  })
+
+  test('removes inline code backticks', () => {
+    expect(markdownToPlainText('`code`')).toBe('code')
+  })
+
+  test('removes code block fences', () => {
+    expect(markdownToPlainText("```js\nconsole.log('hi');\n```"))
+      .toBe("console.log('hi');")
+  })
+
+  test('converts links to text with URL', () => {
+    expect(markdownToPlainText('[click](https://example.com)')).toBe(
+      'click (https://example.com)',
+    )
+  })
+
+  test('handles mixed markdown', () => {
+    expect(markdownToPlainText('# Hello\n\n**bold** and *italic* with `code`'))
+      .toBe('Hello\n\nbold and italic with code')
+  })
+})