docs: fix gap-zero scrollbar, add exclusive-domains illustration

docs: add v2 WeChat article with illustrations and typeset HTML

docs: sync all docs to 146 endpoints, zero gaps, merge article into READMEs

feat: add full email system (send, list, draft, folders)

feat: add real-time event subscription via WebSocket

feat: add diagram-to-document workflow (Mermaid → PNG → Feishu)

feat: add OAuth login with auto token refresh

docs: update wechat article — 134 endpoints, 4 gaps, agent-agnostic

docs: make skill registration agent-agnostic

docs: update to 134 endpoints, mark subtask and upload gaps as resolved

feat: add subtasks, reminders, and followers for tasks

feat: add document media upload (upload-image, upload-file)

docs: rewrite WeChat article with current data and honest comparison

docs: strengthen Max Saver positioning, explain architecture, add honest gaps

docs: rewrite bilingual READMEs with accurate feature coverage