feat: add agent-mail skill, parsed mail API and docs (#993)

* feat: add cf-temp-mail-usage skill and parsed mail API for AI agents

- feat: new /api/parsed_mails and /api/parsed_mail/:id endpoints returning
  server-parsed subject/text/html/attachments metadata (reuses commonParseMail)
- feat: add .claude/skills/cf-temp-mail-usage read-only skill so AI agents
  (OpenClaw / Codex / Cursor) can consume a mailbox with a user-supplied JWT,
  bypassing the Turnstile challenge required for mailbox creation
- refactor: split mails_api/index.ts and admin_api/index.ts into thin route
  shells; move business logic into dedicated *_api.ts files
- docs: update README / README_EN / CHANGELOG with agent-email feature and
  npx degit install instructions for the skill

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* feat: rename skill to cf-temp-mail-agent-mail, add agent-email docs, fix sender trim

- Rename skill from cf-temp-mail-usage to cf-temp-mail-agent-mail
- Rewrite SKILL.md: parsed API primary, local fallback, prerequisites, multi-agent install
- Add vitepress docs (zh + en) for AI Agent mailbox usage
- Fix leading space in parsed_mail_api sender field via .trim()
- Update README install section with 3 install methods
- Update changelogs (zh + en)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* docs: simplify README agent skill section to one-liner with links

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* feat: add send mail API to skill, credential persistence, remove poll example

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

CHANGELOG.md

@@ -10,10 +10,16 @@
 
 ### Features
 
+- feat: |API| 新增服务端解析邮件接口 `/api/parsed_mails` 与 `/api/parsed_mail/:id`，直接返回 `sender` / `subject` / `text` / `html` / `attachments` 元信息（复用 `commonParseMail`），AI agent 侧不再需要引入 MIME 解析器
+- feat: |Skill| 新增仓库内置只读 skill `cf-temp-mail-agent-mail`（`.claude/skills/cf-temp-mail-agent-mail/`），让 OpenClaw / Codex / Cursor 等 AI agent 凭用户提供的 Address JWT + API 地址读取邮箱、轮询验证码，绕开创建邮箱时的 Turnstile 人机验证；可通过 `npx degit dreamhunter2333/cloudflare_temp_email/.claude/skills/cf-temp-mail-agent-mail` 安装
+- docs: |文档| 新增"AI Agent 使用邮箱"文档（`guide/feature/agent-email`），说明 `parsed_mail` API 用法，并在 parsed API 不可用时给出对齐前端的 `mail-parser-wasm` + `postal-mime` 本地解析回退方案
+
 ### Bug Fixes
 
 ### Improvements
 
+- refactor: |Worker| 拆分 `mails_api/index.ts` 与 `admin_api/index.ts`，入口只负责挂路由，业务拆到各自的 `*_api.ts` 文件（`mails_crud.ts` / `new_address.ts` / `parsed_mail_api.ts` / `address_api.ts` / `address_sender_api.ts` / `sendbox_api.ts` / `statistics_api.ts` / `account_settings_api.ts`），保持路径与行为不变
+
 ## v1.7.0(main)
 
 ### Breaking Changes