- Added existing_material_ids to PurchaseForEdit and RestockForEdit types.
- Introduced RawMaterialVariant and ProductVariantForRestock types for better variant handling.
- Updated PurchaseCreate and PurchaseEdit components to fetch and display raw material variants.
- Enhanced RestockCreate and RestockEdit components to manage product variants dynamically.
- Modified TransactionCreate and TransactionEdit components to support product variants.
- Added routes for fetching active products and raw materials.
- Updated ProductIndex component to improve category and product filtering with memoization.
- Refactored Combobox components for better performance and usability.
- Added PurchaseController routes for managing purchases with appropriate permissions.
- Created comprehensive tests for purchase management, covering creation, updating, and deletion scenarios.
- Ensured proper handling of raw materials and their variants during purchase operations.
- Implemented validation for required fields in purchase creation and updates.
