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

scripts/add_business_hours.sql

@@ -0,0 +1,33 @@
+-- Ejecutar este SQL en Supabase Dashboard: Database > SQL Editor
+-- Agrega horarios de atención a la tabla locations
+
+-- Agregar columna business_hours
+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}
+}'::jsonb;
+
+-- Agregar comentario
+COMMENT ON COLUMN locations.business_hours IS 'Horarios de atención por día. Formato JSONB con claves: monday-sunday, cada una con open/close en formato HH:MM e is_closed boolean';
+
+-- Actualizar locations existentes con horarios por defecto
+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}
+}'::jsonb
+WHERE business_hours IS NULL OR business_hours = '{}'::jsonb;
+
+-- Verificar resultados
+SELECT id, name, business_hours FROM locations;