Two-mode import: public mode verifies Komoot account ownership by checking
that the user's trails.cool profile URL appears in their Komoot bio — no
credentials stored. Authenticated mode uses email + password (AES-256-GCM
encrypted) to import private tours as well.
Includes unit tests for crypto/komoot client and E2E tests for the full
connect + import flow.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
