docs: comprehensive content for all 15 documentation pages
Previously 7 pages were stubs ("Coming soon"). Now all 15 have full content:
- index.mdx: SaaS subdomain table, runtime adapters, MCP/SDK links
- quickstart.mdx: 3 setup options (dev-start.sh, docker-compose, manual), SaaS alternative
- concepts.mdx: added external agents, Lark channel, tokens, MCP integration
- architecture.mdx: system diagram, 4 components, infra services, health detection, deployment modes
- api-reference.mdx: all 80+ routes across 19 categories with auth requirements
- channels.mdx: Telegram, Slack, Lark/Feishu adapters with config examples
- plugins.mdx: two-axis model, 12 built-in plugins, install safeguards
- schedules.mdx: cron syntax, concurrency handling, supervision, org template examples
- org-template.mdx: YAML structure, defaults layer, plugin UNION, template registry
- self-hosting.mdx: dev-start.sh, docker-compose, env vars, production deployment
- observability.mdx: activity logs, Langfuse, Prometheus, liveness, WebSocket events
- troubleshooting.mdx: 10 common issues with fixes
Build verified: 19/19 static pages generated.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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