diff --git a/resources/js/Layouts/AuthenticatedLayout.tsx b/resources/js/Layouts/AuthenticatedLayout.tsx
index e710eb2..f5624df 100644
--- a/resources/js/Layouts/AuthenticatedLayout.tsx
+++ b/resources/js/Layouts/AuthenticatedLayout.tsx
@@ -309,19 +309,23 @@ export default function AuthenticatedLayout({
     const menuItems = useMemo(() => {
         return allMenuItems
             .map((item) => {
-                // 如果有子項目，先過濾子項目
+                // 如果有子項目
                 if (item.children && item.children.length > 0) {
                     const filteredChildren = item.children.filter(hasPermissionForItem);
-                    // 若所有子項目都無權限，則隱藏整個群組
-                    if (filteredChildren.length === 0) return null;
-                    return { ...item, children: filteredChildren };
+
+                    // 若有子項目符合權限，則顯示該群組（群組本身的權限僅作為額外過濾）
+                    if (filteredChildren.length > 0) {
+                        return { ...item, children: filteredChildren };
+                    }
+                    return null;
                 }
+
                 // 無子項目的單一選單，直接檢查權限
                 if (!hasPermissionForItem(item)) return null;
                 return item;
             })
             .filter((item): item is MenuItem => item !== null);
-    }, [can, canAny]);
+    }, [allMenuItems, hasPermissionForItem]);
 
     // 初始化狀態：優先讀取 localStorage
     const [expandedItems, setExpandedItems] = useState<string[]>(() => {
diff --git a/resources/markdown/manual/purchasing-workflow.md b/resources/markdown/manual/purchasing-workflow.md
index 3939292..b8a9e94 100644
--- a/resources/markdown/manual/purchasing-workflow.md
+++ b/resources/markdown/manual/purchasing-workflow.md
@@ -31,5 +31,14 @@
 > [!IMPORTANT]
 > 進貨單一旦儲存，系統會立即更新庫存餘額。請務必確認數量正確。
 
+## 4. 儀表板 (Dashboard) 功能
+
+儀表板提供系統目前的關鍵指標與待辦事項：
+- **存貨分析 KPI**：顯示目前總庫存、滯銷品項與即將過期商品。
+- **待辦事項**：列出需審核的單據與待收貨的採購單。
+- **熱銷/積壓排行**：即時掌握銷售趨勢與庫存壓力。
+
+![儀表板示意圖](https://placehold.co/800x400/01ab83/white?text=Dashboard+Overview)
+
 ---
-*下一章：[庫存管理規範](inventory-management)*
\ No newline at end of file
+*下一章：[採購流程說明](purchasing-workflow)*
\ No newline at end of file