feat(Inventory): 實作批號溯源完整功能與 UI 呈現，包含文字敘述卡片與更完整的關聯屬性

app/Modules/Inventory/Services/StoreRequisitionService.php

@@ -122,8 +122,13 @@ class StoreRequisitionService
             $processedItems = []; // 暫存處理後的明細，用於轉入調撥單
             
             if (isset($data['items'])) {
+                $requisition->load('items.product');
+                $reqItemMap = $requisition->items->keyBy('id');
+
                 foreach ($data['items'] as $itemData) {
                     $reqItemId = $itemData['id'];
+                    $reqItem = $reqItemMap->get($reqItemId);
+                    $productName = $reqItem?->product?->name ?? '未知商品';
                     $totalApprovedQty = 0;
                     $batches = $itemData['batches'] ?? [];
 
@@ -133,7 +138,22 @@ class StoreRequisitionService
                         foreach ($batches as $batch) {
                             $qty = (float)($batch['qty'] ?? 0);
                             $bNum = $batch['batch_number'] ?? null;
+                            $invId = $batch['inventory_id'] ?? null;
+                            
                             if ($qty > 0) {
+                                if ($invId) {
+                                    $inventory = \App\Modules\Inventory\Models\Inventory::lockForUpdate()->find($invId);
+                                    if ($inventory) {
+                                        $available = max(0, $inventory->quantity - $inventory->reserved_quantity);
+                                        if ($qty > $available) {
+                                            $batchStr = $bNum ? "批號 {$bNum}" : "無批號";
+                                            throw ValidationException::withMessages([
+                                                'items' => "「{$productName}」的 {$batchStr} 數量({$qty})不可大於可用庫存({$available})",
+                                            ]);
+                                        }
+                                    }
+                                }
+
                                 $totalApprovedQty += $qty;
                                 $batchKey = $bNum ?? '';
                                 $batchGroups[$batchKey] = ($batchGroups[$batchKey] ?? 0) + $qty;
@@ -151,6 +171,18 @@ class StoreRequisitionService
                         // 無批號，傳統輸入
                         $qty = (float)($itemData['approved_qty'] ?? 0);
                         if ($qty > 0) {
+                            $supplyWarehouseId = $requisition->supply_warehouse_id;
+                            $totalAvailable = \App\Modules\Inventory\Models\Inventory::where('warehouse_id', $supplyWarehouseId)
+                                ->where('product_id', $reqItem->product_id)
+                                ->selectRaw('SUM(quantity - reserved_quantity) as available')
+                                ->value('available') ?? 0;
+                                
+                            if ($qty > $totalAvailable) {
+                                throw ValidationException::withMessages([
+                                    'items' => "「{$productName}」的數量({$qty})不可大於供貨倉可用總庫存({$totalAvailable})",
+                                ]);
+                            }
+
                             $totalApprovedQty += $qty;
                             $processedItems[] = [
                                 'req_item_id' => $reqItemId,