Implemented functional settings modal for shipping zones.
Features:
✅ Settings button now opens modal/drawer
✅ Shows zone information (name, regions)
✅ Lists all shipping methods with toggles
✅ Toggle methods directly in modal
✅ Responsive: Dialog on desktop, Drawer on mobile
✅ Link to WooCommerce for advanced settings
✅ Clean, modern UI matching Payments page
Modal Content:
- Zone name and regions (read-only for now)
- Shipping methods list with enable/disable toggles
- Price display for each method
- "Advanced Settings in WooCommerce" link
- Close button
User Experience:
✅ Click Settings button → Modal opens
✅ Toggle methods on/off in modal
✅ Click Advanced Settings → Opens WooCommerce
✅ Click Close → Modal closes
✅ Mobile-friendly drawer on small screens
Next Steps:
- Add editable fields for method settings (cost, conditions)
- Use GenericGatewayForm pattern for WooCommerce form fields
- Add save functionality for method settings
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