phsl / new-api

A new Markdown file `docs/api/web_api.md` has been added that documents all backend REST endpoints used by the Web UI.

Details:
• Lists every `/api`, `/dashboard`, and `/v1/dashboard` route relevant to the Web front-end
• Excludes every Relay-specific path to keep scope focused on Web operations
• Groups endpoints by functional module (initialisation, public info, user, channel, token, logging, etc.)
• Specifies HTTP method, path, required auth level, and concise description for each entry
• Includes an auth-level legend and update-date placeholder for future maintenance

No application logic was modified; this is documentation-only and improves developer onboarding and API discoverability.