Frontend:
- ChatCoach.jsx: streaming chat UI with SSE, provider indicator, suggestion
chips, 'no AI configured' state with setup link
- App.jsx: import + /chat route + nav bar (More → Coach with brain emoji)
- api.js: getAIStatus() method
Documentation:
- README.md: 'Built-in AI Coach' section with 8-provider table, external
agent config snippets for Claude Desktop, Claude Code, Cursor, Windsurf,
and COROS multi-MCP pattern
- AGENT_GUIDE.md: multi-device integration, Strava AI/ML warning,
provider-agnostic statement
Nav bar: Home | Log | Keto | Programs | Coach
Settings still reachable at /settings (linked from Coach setup prompt)
