Replaced auth.admin.listUsers() with profile-based approach
to avoid service role key requirement. Shows partial user ID
as placeholder for email. Added debug logging.
- Database schema:
* Extended user_credits table with daily_limit, API costs, last_reset_at
* Created credit_transactions table for full audit trail
* Added RLS policies for secure access control
- Core services:
* credit-service.ts - balance checking, deduction, addition, transaction history
* admin-credit-service.ts - admin controls for managing users and credits
- API integration:
* Integrated credit checking into discover-whiskybase.ts
* Credits deducted after successful API calls
* Insufficient credits error handling
- Admin interface:
* /admin/users page with user management
* Statistics dashboard (total users, credits in circulation, usage)
* Interactive user table with search
* Edit modal for credit adjustment and settings
* Per-user daily limits and API cost configuration
- Features:
* Automatic credit initialization (100 credits for new users)
* Credit transaction logging with balance_after tracking
* Admin can add/remove credits with reason
* Admin can set custom daily limits per user
* Admin can set custom API costs per user
* Low credit warnings (< 10 credits)
* Full transaction history
- User experience:
* Credits checked before API calls
* Clear error messages for insufficient credits
* Graceful handling of credit deduction failures
System is ready for future enhancements like credit packages,
auto-recharge, and payment integration.
