feat: add device helper for mobile in api

client/web/src/plugin/common/index.ts

@@ -21,6 +21,7 @@ export {
 } from '@/components/Modal';
 export { Loadable } from '@/components/Loadable';
 export { useIsMobile } from '@/hooks/useIsMobile';
+export { isMobile } from '@/utils/device-helper';
 export {
   getGlobalState,
   useGlobalSocketEvent,

client/web/src/utils/device-helper.ts

@@ -0,0 +1,3 @@
+export function isMobile(): boolean {
+  return window.document.body.clientWidth < 768;
+}