feat: 實作銷售單匯入管理、貨道扣庫優化及 UI 細節調整

app/Modules/Inventory/Contracts/InventoryServiceInterface.php

@@ -15,16 +15,15 @@ interface InventoryServiceInterface
     public function checkStock(int $productId, int $warehouseId, float $quantity): bool;
 
     /**
-     * Decrease stock for a product (e.g., when an order is placed).
-     * 
      * @param int $productId
      * @param int $warehouseId
      * @param float $quantity
      * @param string|null $reason
      * @param bool $force
+     * @param string|null $slot
      * @return void
      */
-    public function decreaseStock(int $productId, int $warehouseId, float $quantity, ?string $reason = null, bool $force = false): void;
+    public function decreaseStock(int $productId, int $warehouseId, float $quantity, ?string $reason = null, bool $force = false, ?string $slot = null): void;
 
     /**
      * Get all active warehouses.