feat(checkout): Implement expandable shipping and payment option lists - #20
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This commit introduces a "See more" and "Collapse" mechanism for shipping and payment options in the checkout screen to improve UI readability when multiple options are available.
Key changes:
- **State Management**: Converted `CheckoutScreen` from a `ConsumerWidget` to a `ConsumerStatefulWidget` to manage the local visibility state of option lists.
- **Expand/Collapse Logic**:
- Added `_visibleShippingCount` and `_visiblePaymentCount` to track displayed items independently.
- Set an initial visibility limit of 3 items with an expansion step of 5 items.
- **UI Components**:
- Integrated "Xem thêm" (See more) buttons that display the remaining count of options.
- Added "Thu gọn" (Collapse) buttons to reset the list view once fully expanded.
- Updated `_buildShippingSection` and `_buildPaymentSection` to conditionally render these controls based on the number of available options.
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This commit introduces a "See more" and "Collapse" mechanism for shipping and payment options in the checkout screen to improve UI readability when multiple options are available.
Key changes:
CheckoutScreenfrom aConsumerWidgetto aConsumerStatefulWidgetto manage the local visibility state of option lists._visibleShippingCountand_visiblePaymentCountto track displayed items independently._buildShippingSectionand_buildPaymentSectionto conditionally render these controls based on the number of available options.