diff --git a/app/Modules/Inventory/Controllers/InventoryController.php b/app/Modules/Inventory/Controllers/InventoryController.php
index cb6c986..eb28985 100644
--- a/app/Modules/Inventory/Controllers/InventoryController.php
+++ b/app/Modules/Inventory/Controllers/InventoryController.php
@@ -12,10 +12,20 @@ use App\Modules\Inventory\Models\Product;
 use App\Modules\Inventory\Models\Inventory;
 use App\Modules\Inventory\Models\WarehouseProductSafetyStock;
 
+use App\Modules\Core\Contracts\CoreServiceInterface;
+
 class InventoryController extends Controller
 {
+    protected $coreService;
+
+    public function __construct(CoreServiceInterface $coreService)
+    {
+        $this->coreService = $coreService;
+    }
+
     public function index(Request $request, Warehouse $warehouse)
     {
+        // ... (existing code for index) ...
         $warehouse->load([
             'inventories.product.category',
             'inventories.product.baseUnit',
@@ -118,7 +128,7 @@ class InventoryController extends Controller
 
     public function create(Warehouse $warehouse)
     {
-        // 取得所有商品供前端選單使用
+       // ... (unchanged) ...
         $products = Product::with(['baseUnit', 'largeUnit'])
             ->select('id', 'name', 'code', 'base_unit_id', 'large_unit_id', 'conversion_rate')
             ->get()
@@ -141,6 +151,7 @@ class InventoryController extends Controller
 
     public function store(Request $request, Warehouse $warehouse)
     {
+        // ... (unchanged) ...
         $validated = $request->validate([
             'inboundDate' => 'required|date',
             'reason' => 'required|string',
@@ -232,9 +243,7 @@ class InventoryController extends Controller
         });
     }
 
-    /**
-     * API: 取得商品在特定倉庫的所有批號，並回傳當前日期/產地下的一個流水號
-     */
+    // ... (getBatches unchanged) ...
     public function getBatches(Warehouse $warehouse, $productId, Request $request)
     {
         $originCountry = $request->query('originCountry', 'TW');
@@ -272,17 +281,21 @@ class InventoryController extends Controller
         ]);
     }
 
+
     public function edit(Request $request, Warehouse $warehouse, $inventoryId)
     {
-        // 取得庫存紀錄，包含商品資訊與異動紀錄 (含經手人)
-        // 這裡如果是 Mock 的 ID (mock-inv-1)，需要特殊處理
         if (str_starts_with($inventoryId, 'mock-inv-')) {
              return redirect()->back()->with('error', '無法編輯範例資料');
         }
 
+        // 移除 'transactions.user' 預載入
         $inventory = Inventory::with(['product', 'transactions' => function($query) {
             $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
-        }, 'transactions.user'])->findOrFail($inventoryId);
+        }])->findOrFail($inventoryId);
+
+        // 手動 Hydrate 使用者資料
+        $userIds = $inventory->transactions->pluck('user_id')->filter()->unique()->toArray();
+        $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
 
         // 轉換為前端需要的格式
         $inventoryData = [
@@ -300,7 +313,8 @@ class InventoryController extends Controller
         ];
 
         // 整理異動紀錄
-        $transactions = $inventory->transactions->map(function ($tx) {
+        $transactions = $inventory->transactions->map(function ($tx) use ($users) {
+            $user = $tx->user_id ? ($users[$tx->user_id] ?? null) : null;
             return [
                 'id' => (string) $tx->id,
                 'type' => $tx->type,
@@ -308,7 +322,7 @@ class InventoryController extends Controller
                 'unit_cost' => (float) $tx->unit_cost,
                 'balanceAfter' => (float) $tx->balance_after,
                 'reason' => $tx->reason,
-                'userName' => $tx->user ? $tx->user->name : '系統',
+                'userName' => $user ? $user->name : '系統', // 手動對應
                 'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
             ];
         });
@@ -322,9 +336,7 @@ class InventoryController extends Controller
 
     public function update(Request $request, Warehouse $warehouse, $inventoryId)
     {
-        // ... (略，後續由服務或在此處更新成本邏輯) ...
-        // 為求簡單，先僅加上驗證與欄位更新
-        
+        // ... (unchanged) ...
         $inventory = Inventory::find($inventoryId);
         
         // 如果找不到 (可能是舊路由傳 product ID)
@@ -435,7 +447,8 @@ class InventoryController extends Controller
 
     public function destroy(Warehouse $warehouse, $inventoryId)
     {
-         $inventory = Inventory::findOrFail($inventoryId);
+         // ... (unchanged) ...
+          $inventory = Inventory::findOrFail($inventoryId);
          
          // 庫存 > 0 不允許刪除 (哪怕是軟刪除)
          if ($inventory->quantity > 0) {
@@ -474,11 +487,17 @@ class InventoryController extends Controller
 
         if ($inventoryId) {
             // 單一批號查詢
+            // 移除 'transactions.user'
             $inventory = Inventory::with(['product', 'transactions' => function($query) {
                 $query->orderBy('actual_time', 'desc')->orderBy('id', 'desc');
-            }, 'transactions.user'])->findOrFail($inventoryId);
+            }])->findOrFail($inventoryId);
 
-            $transactions = $inventory->transactions->map(function ($tx) {
+            // 手動 Hydrate 使用者資料
+            $userIds = $inventory->transactions->pluck('user_id')->filter()->unique()->toArray();
+            $users = $this->coreService->getUsersByIds($userIds)->keyBy('id');
+
+            $transactions = $inventory->transactions->map(function ($tx) use ($users) {
+                $user = $tx->user_id ? ($users[$tx->user_id] ?? null) : null;
                 return [
                     'id' => (string) $tx->id,
                     'type' => $tx->type,
@@ -486,7 +505,7 @@ class InventoryController extends Controller
                     'unit_cost' => (float) $tx->unit_cost, 
                     'balanceAfter' => (float) $tx->balance_after,
                     'reason' => $tx->reason,
-                    'userName' => $tx->user ? $tx->user->name : '系統',
+                    'userName' => $user ? $user->name : '系統', // 手動對應
                     'actualTime' => $tx->actual_time ? $tx->actual_time->format('Y-m-d H:i') : $tx->created_at->format('Y-m-d H:i'),
                 ];
             });
diff --git a/app/Modules/Inventory/Models/InventoryTransaction.php b/app/Modules/Inventory/Models/InventoryTransaction.php
index db69df5..7cfcf73 100644
--- a/app/Modules/Inventory/Models/InventoryTransaction.php
+++ b/app/Modules/Inventory/Models/InventoryTransaction.php
@@ -4,7 +4,7 @@ namespace App\Modules\Inventory\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
-use App\Modules\Core\Models\User; // 跨模組核心依賴
+
 
 class InventoryTransaction extends Model
 {
@@ -35,11 +35,6 @@ class InventoryTransaction extends Model
         return $this->belongsTo(Inventory::class);
     }
 
-    public function user(): \Illuminate\Database\Eloquent\Relations\BelongsTo
-    {
-        return $this->belongsTo(User::class);
-    }
-
     public function reference(): \Illuminate\Database\Eloquent\Relations\MorphTo
     {
         return $this->morphTo();
diff --git a/app/Modules/Production/Models/ProductionOrder.php b/app/Modules/Production/Models/ProductionOrder.php
index 917fcb6..60fbe20 100644
--- a/app/Modules/Production/Models/ProductionOrder.php
+++ b/app/Modules/Production/Models/ProductionOrder.php
@@ -70,30 +70,6 @@ class ProductionOrder extends Model
         return $prefix . $sequence;
     }
 
-    /**
-     * @deprecated 使用 InventoryServiceInterface 獲取產品資訊
-     */
-    public function product()
-    {
-        return null;
-    }
-
-    /**
-     * @deprecated 使用 InventoryServiceInterface 獲取倉庫資訊
-     */
-    public function warehouse()
-    {
-        return null;
-    }
-
-    /**
-     * @deprecated 使用 CoreServiceInterface 獲取使用者資訊
-     */
-    public function user()
-    {
-        return null;
-    }
-
     public function items(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
         return $this->hasMany(ProductionOrderItem::class);
diff --git a/app/Modules/Production/Models/ProductionOrderItem.php b/app/Modules/Production/Models/ProductionOrderItem.php
index 84b21fa..92eaabd 100644
--- a/app/Modules/Production/Models/ProductionOrderItem.php
+++ b/app/Modules/Production/Models/ProductionOrderItem.php
@@ -22,32 +22,8 @@ class ProductionOrderItem extends Model
         'quantity_used' => 'decimal:4',
     ];
 
-    /**
-     * @deprecated 使用 InventoryServiceInterface 獲取庫存資訊
-     */
-    public function inventory()
-    {
-        return null;
-    }
-
-    /**
-     * @deprecated 
-     */
-    public function unit()
-    {
-        return null;
-    }
-
     public function productionOrder(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(ProductionOrder::class);
     }
-
-    /**
-     * @deprecated 使用 InventoryServiceInterface 獲取產品資訊
-     */
-    public function product()
-    {
-        return null;
-    }
 }