Checkout Step Widgets

Five composable sections rendered by CheckoutScreen: address form, shipping option picker, payment method picker, booking question form, and the read-only booking policy block.

1. checkout_address_section.dart: form + submit → updateShippingAddress(Address).
2. checkout_shipping_options.dart: lists state.availableShippingOptions → setShippingOption.
3. checkout_payment_methods.dart: lists state.availablePaymentProviders → setPaymentProvider.
4. checkout_booking_questions.dart: renders per-question UI by q['type'] → setQuestionAnswer.
5. checkout_booking_policy.dart: read-only display of bookingPolicy from ProvisionService.

• Booking-question types: 'single_select' / 'multi_select' / 'yes_no' (use selected_option_ids), 'free_text' (comment), 'number' (number), 'image_upload' (image_file_id).
• Required-question validation is deferred to confirmStripePayment — the widgets themselves do not block submission.
• Shipping options can come back empty when address is missing or unsupported — UI must guide the user back to address.

• lib/src/features/shared/checkout/views/widgets/checkout_address_section.dart
• lib/src/features/shared/checkout/views/widgets/checkout_shipping_options.dart
• lib/src/features/shared/checkout/views/widgets/checkout_payment_methods.dart
• lib/src/features/shared/checkout/views/widgets/checkout_booking_questions.dart
• lib/src/features/shared/checkout/views/widgets/checkout_booking_policy.dart

Each widget is dumb (props in, callback out) — state lives in CheckoutController only, no per-widget Riverpod providers.