fix(kpi): [CLAUDE] fix Google Sheets key mapping and add ai-in-taiwan page support

- Add KEY_MAPPING to map Google Sheets keys to internal keys
- Fix Trainees -> trainee, Lecturers -> lectures, etc.
- Update ai-in-taiwan page to receive and display dynamic KPI data
- Inject KpiService into ai-in-taiwan route

Co-Authored-By: Claude <noreply@example.com>