fix: use NextJS basePath and WEB_PREFIX to support custom prefix (#19497)

Co-authored-by: johnny0120 <15564476+johnny0120@users.noreply.github.com>

web/app/install/installForm.tsx

@@ -16,7 +16,6 @@ import Button from '@/app/components/base/button'
 
 import { fetchInitValidateStatus, fetchSetupStatus, setup } from '@/service/common'
 import type { InitValidateStatusResponse, SetupStatusResponse } from '@/models/common'
-import { basePath } from '@/utils/var'
 
 const validPassword = /^(?=.*[a-zA-Z])(?=.*\d).{8,}$/
 
@@ -81,12 +80,12 @@ const InstallForm = () => {
     fetchSetupStatus().then((res: SetupStatusResponse) => {
       if (res.step === 'finished') {
         localStorage.setItem('setup_status', 'finished')
-        router.push(`${basePath}/signin`)
+        router.push('/signin')
       }
       else {
         fetchInitValidateStatus().then((res: InitValidateStatusResponse) => {
           if (res.status === 'not_started')
-            router.push(`${basePath}/init`)
+            router.push('/init')
         })
       }
       setLoading(false)