Fix menu filtering in MenuManager for non-system users

- Update MenuManager.vue to match menu.ts filtering logic
- Non-system users should only see Tool Marketplace in Development group
- Hide App Marketplace, Node Marketplace, and Agent Marketplace for non-system users
- Restore documentation comments in menu.ts

apps/jingrow/frontend/src/views/settings/MenuManager.vue

@@ -180,9 +180,9 @@ const filteredItems = computed(() => {
         return false
       }
       
-      // 开发分组下只允许显示：应用市场、节点市场、智能体市场、工具市场
+      // 开发分组下只允许显示：工具市场（非 System User 不显示应用市场、节点市场、智能体市场）
       if (m.parentId === 'dev-group') {
-        const allowedDevMenus = ['app-marketplace', 'node-marketplace', 'agent-marketplace', 'tool-marketplace']
+        const allowedDevMenus = ['tool-marketplace']
         if (!allowedDevMenus.includes(m.id)) {
           return false
         }