Extends the Komoot import change to support two connection modes:
- Public mode: user places their trails.cool profile URL in their Komoot
bio field; trails.cool verifies ownership via the unauthenticated public
API (content_text field), then imports public tours with no credentials stored
- Authenticated mode: existing email + password flow, imports all tours
including private ones
The profile URL verification doubles as cross-platform discovery — the
link stays in the Komoot bio permanently.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>