feat(inventory): 支援庫存新增不使用批號模式與自動累加邏輯

app/Modules/Inventory/Controllers/InventoryController.php

@@ -163,7 +163,7 @@ class InventoryController extends Controller
             'items.*.productId' => 'required|exists:products,id',
             'items.*.quantity' => 'required|numeric|min:0.01',
             'items.*.unit_cost' => 'nullable|numeric|min:0', // 新增成本驗證
-            'items.*.batchMode' => 'required|in:existing,new',
+            'items.*.batchMode' => 'required|in:existing,new,none',
             'items.*.inventoryId' => 'required_if:items.*.batchMode,existing|nullable|exists:inventories,id',
             'items.*.originCountry' => 'required_if:items.*.batchMode,new|nullable|string|max:2',
             'items.*.expiryDate' => 'nullable|date',
@@ -188,6 +188,26 @@ class InventoryController extends Controller
                     if (isset($item['unit_cost'])) {
                         $inventory->unit_cost = $item['unit_cost'];
                     }
+                } elseif ($item['batchMode'] === 'none') {
+                    // 模式 C：不使用批號 (自動累加至 NO-BATCH)
+                    $inventory = $warehouse->inventories()->withTrashed()->firstOrNew(
+                        [
+                            'product_id' => $item['productId'],
+                            'batch_number' => 'NO-BATCH'
+                        ],
+                        [
+                            'quantity' => 0,
+                            'unit_cost' => $item['unit_cost'] ?? 0,
+                            'total_value' => 0,
+                            'arrival_date' => $validated['inboundDate'],
+                            'expiry_date' => null,
+                            'origin_country' => 'TW',
+                        ]
+                    );
+
+                    if ($inventory->trashed()) {
+                        $inventory->restore();
+                    }
                 } else {
                     // 模式 B：建立新批號
                     $originCountry = $item['originCountry'] ?? 'TW';