feat: enhance tool list retrieval with shared folder filtering and structured response

--bug=1060012 --user=刘瑞斌 【应用】高级编排获取的共享工具列表为空 https://www.tapd.cn/62980211/s/1749230

ui/src/views/application-workflow/component/DropdownMenu.vue

@@ -250,6 +250,7 @@ async function getToolFolder() {
 async function getToolList() {
   const res = await loadSharedApi({
     type: 'tool',
+    isShared: folder.currentFolder?.id === 'share',
     systemType: 'workspace',
   }).getToolList({
     folder_id: folder.currentFolder?.id || user.getWorkspaceId(),