Backend:
- Added /checkout/shipping-rates REST endpoint
- Returns available shipping methods from matching zone
- Triggers woonoow/shipping/before_calculate hook for Rajaongkir
Frontend:
- Added ShippingRate interface and state
- Added fetchShippingRates with 500ms debounce
- Replaced hardcoded shipping options with dynamic rates
- Added loading and empty state handling
- Added shipping_method to order submission payload
This fixes:
- Rajaongkir rates not appearing (now fetched from API)
- Free shipping showing despite disabled (now from WC zones)
56b0040f7a