Problem:
- 'F13' display text confused with Frame numbers
- Users cannot distinguish between Trace ID and Frame Number
Solution:
- Change display format from 'F{trace_id}' to 'Face{trace_id}'
- Example: F13 → Face13, F142 → Face142
Changes:
- src/views/PeopleView.vue:264 - Cluster Detail Modal label
Benefits:
- Clear semantic meaning (Face vs Frame)
- No ambiguity for users
- Display layer only, data layer unchanged (still trace_id)