feat: implement customer registration flow and business hours system

Major changes:
- Add customer registration with email/phone lookup (app/booking/registro)
- Add customers API endpoint (app/api/customers/route)
- Implement business hours for locations (mon-fri 10-7, sat 10-6, sun closed)
- Fix availability function type casting issues
- Add business hours utilities (lib/utils/business-hours.ts)
- Update Location type to include business_hours JSONB
- Add mock payment component for testing
- Remove Supabase auth from booking flow
- Fix /cita redirect path in booking flow

Database migrations:
- Add category column to services table
- Add business_hours JSONB column to locations table
- Fix availability functions with proper type casting
- Update get_detailed_availability to use business_hours

Features:
- Customer lookup by email or phone
- Auto-redirect to registration if customer not found
- Pre-fill customer data if exists
- Business hours per day of week
- Location-specific opening/closing times

supabase/migrations/20260117010000_add_location_business_hours.sql

@@ -0,0 +1,13 @@
+-- Add business hours to locations table
+-- Format: JSONB with daily opening/closing times
+
+ALTER TABLE locations 
+ADD COLUMN IF NOT EXISTS business_hours JSONB DEFAULT '{"monday":{"open":"10:00","close":"19:00","is_closed":false},"tuesday":{"open":"10:00","close":"19:00","is_closed":false},"wednesday":{"open":"10:00","close":"19:00","is_closed":false},"thursday":{"open":"10:00","close":"19:00","is_closed":false},"friday":{"open":"10:00","close":"19:00","is_closed":false},"saturday":{"open":"10:00","close":"18:00","is_closed":false},"sunday":{"is_closed":true}}';
+
+-- Add comments
+COMMENT ON COLUMN locations.business_hours IS 'Business hours for each day of the week in JSONB format. Keys: monday-sunday with open/close times in HH:MM format and is_closed boolean';
+
+-- Update existing locations with default hours
+UPDATE locations 
+SET business_hours = '{"monday":{"open":"10:00","close":"19:00","is_closed":false},"tuesday":{"open":"10:00","close":"19:00","is_closed":false},"wednesday":{"open":"10:00","close":"19:00","is_closed":false},"thursday":{"open":"10:00","close":"19:00","is_closed":false},"friday":{"open":"10:00","close":"19:00","is_closed":false},"saturday":{"open":"10:00","close":"18:00","is_closed":false},"sunday":{"is_closed":true}}'
+WHERE business_hours IS NULL OR business_hours = '{}'::jsonb;