feat: 倉庫業務屬性、庫存成本追蹤與採購單功能更新

1. 倉庫管理：新增業務類型 (Owned/External/Customer) 與車牌資訊與司機欄位。
2. 庫存管理：實作成本追蹤 (unit_cost, total_value)，更新列表與撥補單顯示。
3. 採購單：新增採購日期 (order_date)，調整欄位名稱與順序。
4. 前端優化：更新相關 TS Type 定義與 UI 顯示。

app/Modules/Inventory/Services/InventoryService.php

@@ -105,16 +105,28 @@ class InventoryService implements InventoryServiceInterface
                 $inventory = Inventory::lockForUpdate()->find($inventory->id);
                 $balanceBefore = $inventory->quantity;
                 
+                // 加權平均成本計算 (可選，這裡先採簡單邏輯：若有新成本則更新，否則沿用)
+                // 若本次入庫有指定成本，則更新該批次單價 (假設同批號成本相同)
+                if (isset($data['unit_cost'])) {
+                    $inventory->unit_cost = $data['unit_cost'];
+                }
+                
                 $inventory->quantity += $data['quantity'];
+                // 更新總價值
+                $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+
                 // 更新其他可能變更的欄位 (如最後入庫日)
                 $inventory->arrival_date = $data['arrival_date'] ?? $inventory->arrival_date;
                 $inventory->save();
             } else {
                 // 若不存在，則建立新紀錄
+                $unitCost = $data['unit_cost'] ?? 0;
                 $inventory = Inventory::create([
                     'warehouse_id' => $data['warehouse_id'],
                     'product_id' => $data['product_id'],
                     'quantity' => $data['quantity'],
+                    'unit_cost' => $unitCost,
+                    'total_value' => $data['quantity'] * $unitCost,
                     'batch_number' => $data['batch_number'] ?? null,
                     'box_number' => $data['box_number'] ?? null,
                     'origin_country' => $data['origin_country'] ?? 'TW',
@@ -129,6 +141,7 @@ class InventoryService implements InventoryServiceInterface
                 'inventory_id' => $inventory->id,
                 'type' => '入庫',
                 'quantity' => $data['quantity'],
+                'unit_cost' => $inventory->unit_cost, // 記錄當下成本
                 'balance_before' => $balanceBefore,
                 'balance_after' => $inventory->quantity,
                 'reason' => $data['reason'] ?? '手動入庫',
@@ -148,13 +161,17 @@ class InventoryService implements InventoryServiceInterface
             $inventory = Inventory::lockForUpdate()->findOrFail($inventoryId);
             $balanceBefore = $inventory->quantity;
             
-            $inventory->decrement('quantity', $quantity);
+            $inventory->decrement('quantity', $quantity); // decrement 不會自動觸發 total_value 更新
+            // 需要手動更新總價值
             $inventory->refresh();
+            $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
+            $inventory->save();
 
             \App\Modules\Inventory\Models\InventoryTransaction::create([
                 'inventory_id' => $inventory->id,
                 'type' => '出庫',
                 'quantity' => -$quantity,
+                'unit_cost' => $inventory->unit_cost, // 記錄出庫時的成本
                 'balance_before' => $balanceBefore,
                 'balance_after' => $inventory->quantity,
                 'reason' => $reason ?? '庫存扣減',