fix(menu): refactor menu system to use pure config objects and fix submenu click events

src/components/menu/item.ts

@@ -0,0 +1,14 @@
+/**
+ * 菜单项配置接口 (用于简化的对象配置)
+ */
+export interface MenuItemConfig {
+    id: string;
+    label: string;
+    onClick?: () => void;
+    icon?: string;
+    group?: string;
+    order?: number;
+    children?: MenuItemConfig[];
+    disabled?: boolean;
+    visible?: boolean;
+}