- Add a custom hook `useCardTableExpand` for managing expandable card tables.
- Refactor product columns to include variant edit and delete handlers.
- Integrate `CardTable` component for displaying products with expandable variant details.
- Create `ProductCardRow` component for rendering product information in a card format.
- Implement variant editing functionality with a dedicated `ProductVariantEdit` component.
- Add `VariantSubRow` component to display variant details in a table format.
- Update routes to handle product variant editing and deletion.
- Enhance tests to cover variant editing and deletion scenarios.
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