Manual assignments are the user's definitive word and Race assignments come
from a hard Garmin fact (eventType.typeKey), not a retunable rule -- neither
is ever touched by reclassify again, and Race can no longer be set by hand
via the review queue. Adds an Activities page so this locked/unlocked status
is visible per workout, since Review Queue only ever showed unresolved items.
Implements GET /api/profile and PUT /api/profile endpoints with validation
of HR zones (must be contiguous, non-overlapping, 0-100%). Also updates
profile migration to use correct HR zone defaults (0-20, 20-40, etc.)
that match validation requirements.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
