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/Services/InventoryService.php

@@ -59,13 +59,18 @@ class InventoryService implements InventoryServiceInterface
         return $stock >= $quantity;
     }
 
-    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 $slot = null): void
     {
-        DB::transaction(function () use ($productId, $warehouseId, $quantity, $reason, $force) {
-            $inventories = Inventory::where('product_id', $productId)
+        DB::transaction(function () use ($productId, $warehouseId, $quantity, $reason, $force, $slot) {
+            $query = Inventory::where('product_id', $productId)
                 ->where('warehouse_id', $warehouseId)
-                ->where('quantity', '>', 0)
-                ->orderBy('arrival_date', 'asc')
+                ->where('quantity', '>', 0);
+            
+            if ($slot) {
+                $query->where('location', $slot);
+            }
+
+            $inventories = $query->orderBy('arrival_date', 'asc')
                 ->get();
 
             $remainingToDecrease = $quantity;
@@ -80,19 +85,25 @@ class InventoryService implements InventoryServiceInterface
 
             if ($remainingToDecrease > 0) {
                 if ($force) {
-                    // Find any existing inventory record in this warehouse to subtract from, or create one
-                    $inventory = Inventory::where('product_id', $productId)
-                        ->where('warehouse_id', $warehouseId)
-                        ->first();
+                    // Find any existing inventory record in this warehouse/slot to subtract from, or create one
+                    $query = Inventory::where('product_id', $productId)
+                        ->where('warehouse_id', $warehouseId);
+                    
+                    if ($slot) {
+                        $query->where('location', $slot);
+                    }
+
+                    $inventory = $query->first();
                     
                     if (!$inventory) {
                         $inventory = Inventory::create([
                             'warehouse_id' => $warehouseId,
                             'product_id' => $productId,
+                            'location' => $slot,
                             'quantity' => 0,
                             'unit_cost' => 0,
                             'total_value' => 0,
-                            'batch_number' => 'POS-AUTO-' . time(),
+                            'batch_number' => 'POS-AUTO-' . ($slot ? $slot . '-' : '') . time(),
                             'arrival_date' => now(),
                             'origin_country' => 'TW',
                             'quality_status' => 'normal',