Add a documentation-grounded help chat assistant accessible from every
page via a floating button in the bottom-right corner.
Backend (compliance-agent):
- New POST /api/v1/help/chat endpoint
- Loads README.md + docs/**/*.md at first request (OnceLock cache)
- Excludes node_modules, uses walkdir for discovery
- Falls back to degraded prompt if docs not found
- Uses LiteLLM via existing chat_with_messages infrastructure
Dashboard (compliance-dashboard):
- New HelpChat component with toggle button, message area, input
- Styled to match Obsidian Control theme (dark, accent cyan)
- Renders in AppShell so it's available on every page
- Multi-turn conversation with history
- Server function proxies to agent API
Also:
- Remove Settings page (route, sidebar entry, page file)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>