Dir tree doc and move some code (#1466)

* tree doc and move some code

* fix: ts

projects/app/src/pages/_error.tsx

@@ -3,6 +3,7 @@ import { useRouter } from 'next/router';
 import { serviceSideProps } from '@/web/common/utils/i18n';
 import { useSystemStore } from '@/web/common/system/useSystemStore';
 import { Box } from '@chakra-ui/react';
+import { TrackEventName } from '@/web/common/system/constants';
 
 function Error() {
   const router = useRouter();
@@ -10,7 +11,7 @@ function Error() {
 
   useEffect(() => {
     setTimeout(() => {
-      window.umami?.track('pageError', {
+      window.umami?.track(TrackEventName.pageError, {
         userAgent: navigator.userAgent,
         platform: navigator.platform,
         appName: navigator.appName,