fix(frontend): 管理画面のリンク切れを修正

[kakkokari-gtyih]

What

Why

Fix #14830

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 19.43%. Comparing base (15ae160) to head (da3eb29).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/frontend/src/pages/admin/index.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #14831       +/-   ##
============================================
- Coverage    39.65%   19.43%   -20.23%     
============================================
  Files         1555      722      -833     
  Lines       196110   102699    -93411     
  Branches      3636      991     -2645     
============================================
- Hits         77765    19958    -57807     
+ Misses      117743    82191    -35552     
+ Partials       602      550       -52     

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[kakkokari-gtyih]

👀

[syuilo]

🙏