feat: 實作出貨單模組並暫時導向通用製作中頁面，同步優化盤點與調撥功能的活動日誌顯示

app/Modules/Inventory/Contracts/InventoryServiceInterface.php

@@ -106,6 +106,16 @@ interface InventoryServiceInterface
      */
     public function decreaseInventoryQuantity(int $inventoryId, float $quantity, ?string $reason = null, ?string $referenceType = null, $referenceId = null);
 
+    /**
+     * Find a specific inventory record by warehouse, product and batch.
+     * 
+     * @param int $warehouseId
+     * @param int $productId
+     * @param string|null $batchNumber
+     * @return object|null
+     */
+    public function findInventoryByBatch(int $warehouseId, int $productId, ?string $batchNumber);
+
     /**
      * Get statistics for the dashboard.
      * 

app/Modules/Inventory/Controllers/TransferOrderController.php

@@ -127,7 +127,7 @@ class TransferOrderController extends Controller
                     'batch_number' => $item->batch_number,
                     'unit' => $item->product->baseUnit?->name,
                     'quantity' => (float) $item->quantity,
-                    'max_quantity' => $stock ? (float) $stock->quantity : 0.0,
+                    'max_quantity' => $item->snapshot_quantity ? (float) $item->snapshot_quantity : ($stock ? (float) $stock->quantity : 0.0),
                     'notes' => $item->notes,
                 ];
             }),
@@ -154,14 +154,22 @@ class TransferOrderController extends Controller
         ]);
 
         // 1. 先更新資料
+        $itemsChanged = false;
         if ($request->has('items')) {
-            $this->transferService->updateItems($order, $validated['items']);
+            $itemsChanged = $this->transferService->updateItems($order, $validated['items']);
         }
 
-        $order->fill($request->only(['remarks']));
+        $remarksChanged = $order->remarks !== ($validated['remarks'] ?? null);
         
-        // [IMPORTANT] 使用 touch() 確保即便只有品項異動，也會因為 updated_at 變更而觸發自動日誌
-        $order->touch(); 
+        if ($itemsChanged || $remarksChanged) {
+            $order->remarks = $validated['remarks'] ?? null;
+            // [IMPORTANT] 使用 touch() 確保即便只有品項異動，也會因為 updated_at 變更而觸發自動日誌
+            $order->touch(); 
+            $message = '儲存成功';
+        } else {
+            $message = '資料未變更';
+            // 如果沒變更，就不執行 touch()，也不會產生 Activity Log
+        }
 
         // 2. 判斷是否需要過帳
         if ($request->input('action') === 'post') {
@@ -174,7 +182,7 @@ class TransferOrderController extends Controller
             }
         }
 
-        return redirect()->back()->with('success', '儲存成功');
+        return redirect()->back()->with('success', $message);
     }
 
     public function destroy(InventoryTransferOrder $order)

app/Modules/Inventory/Models/InventoryTransferItem.php

@@ -15,6 +15,7 @@ class InventoryTransferItem extends Model
         'product_id',
         'batch_number',
         'quantity',
+        'snapshot_quantity',
         'notes',
     ];
 

app/Modules/Inventory/Services/InventoryService.php

@@ -188,6 +188,14 @@ class InventoryService implements InventoryServiceInterface
         });
     }
 
+    public function findInventoryByBatch(int $warehouseId, int $productId, ?string $batchNumber)
+    {
+        return Inventory::where('warehouse_id', $warehouseId)
+            ->where('product_id', $productId)
+            ->where('batch_number', $batchNumber)
+            ->first();
+    }
+
     public function getDashboardStats(): array
     {
         // 庫存總表 join 安全庫存表，計算低庫存

app/Modules/Inventory/Services/TransferService.php

@@ -31,9 +31,9 @@ class TransferService
     /**
      * 更新調撥單明細 (支援精確 Diff 與自動日誌整合)
      */
-    public function updateItems(InventoryTransferOrder $order, array $itemsData): void
+    public function updateItems(InventoryTransferOrder $order, array $itemsData): bool
     {
-        DB::transaction(function () use ($order, $itemsData) {
+        return DB::transaction(function () use ($order, $itemsData) {
             // 1. 準備舊資料索引 (Key: product_id . '_' . batch_number)
             $oldItemsMap = $order->items->mapWithKeys(function ($item) {
                 $key = $item->product_id . '_' . ($item->batch_number ?? '');
@@ -88,9 +88,13 @@ class TransferService
                         ];
                     }
                 } else {
-                    // 新增
-                    $diff['added'][] = [
+                    // 新增 (使用者需求：顯示為更新，從 0 -> X)
+                    $diff['updated'][] = [
                         'product_name' => $item->product->name,
+                        'old' => [
+                            'quantity' => 0,
+                            'notes' => null,
+                        ],
                         'new' => [
                             'quantity' => (float)$item->quantity,
                             'notes' => $item->notes,
@@ -113,10 +117,12 @@ class TransferService
             }
 
             // 4. 將 Diff 注入到 Model 的暫存屬性中
-            // 如果 Diff 有內容，才注入
-            if (!empty($diff['added']) || !empty($diff['removed']) || !empty($diff['updated'])) {
+            $hasChanged = !empty($diff['added']) || !empty($diff['removed']) || !empty($diff['updated']);
+            if ($hasChanged) {
                  $order->activityProperties['items_diff'] = $diff;
             }
+
+            return $hasChanged;
         });
     }
 
@@ -149,6 +155,9 @@ class TransferService
 
                 $oldSourceQty = $sourceInventory->quantity;
                 $newSourceQty = $oldSourceQty - $item->quantity;
+
+                // 儲存庫存快照
+                $item->update(['snapshot_quantity' => $oldSourceQty]);
                 
                 $sourceInventory->quantity = $newSourceQty;
                 // 更新總值 (假設成本不變)