Docs polish + companion tool-ui compact

Improved

  • API reference sidebar nav restructure (collapsed send-by-type groups, Kapso-style dividers)
  • Companion sidebar tool output compact: chart, stats, and data-table now fit the narrow panel (no horizontal overflow, ~9rem chart height)
  • Webhook event catalog trimmed for integrators (accordion / less comparison noise)
  • endpoints-catalog.mdx removed — API reference tab + OpenAPI is the single source of truth
  • Changelog and repo README wording aligned (no internal “public API” tone)

Added

  • Redirect /api/endpoints-catalog/api-reference/overview
  • SDK More SDK topics navigation group
  • API reference anchor: Send a message (Kapso-style examples)
API docs expansion

Added

  • OpenAPI-powered API reference tab
  • Interactive API playground configuration
  • Endpoint examples for auth and messages
  • Channel support matrix (official vs unofficial)
  • Webhooks, SDK snippets, security guide, error catalog, and recipes

Improved

  • Clearer onboarding flow for first API calls
  • Better cross-links between guides and reference pages
Initial API docs

Added

  • Introduction and quickstart
  • API fundamentals pages
  • Initial endpoint catalog