- Add /docs route serving web/templates/api.html: full Bootstrap 5
documentation page covering all three API endpoints with parameter
tables, example requests, and example responses
- Add 'API docs' link to the navbar on the main map page
- Update README.md: add web frontend section with feature list, dev
server instructions, and API endpoint summary table
- Update AGENTS.md: add web/ layout, API endpoint table, Flask run
instructions, and route_master example relation IDs
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>