enhance(frontend): フォントサイズ設定でアプリ全体のスケールも変更するようにwip

[kakkokari-gtyih]

What

wip

Why

Fix #14027

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

❌ Patch coverage is 0% with 38 lines in your changes missing coverage. Please review.
✅ Project coverage is 13.79%. Comparing base (cdb958c) to head (6baa2c6).
⚠️ Report is 74 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/frontend/src/utility/popup-position.ts	0.00%	22 Missing and 1 partial ⚠️
packages/frontend/src/components/MkModal.vue	0.00%	14 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #17190      +/-   ##
===========================================
- Coverage    14.03%   13.79%   -0.24%     
===========================================
  Files          238      241       +3     
  Lines        11296    11696     +400     
  Branches      3736     3953     +217     
===========================================
+ Hits          1585     1614      +29     
- Misses        7586     7912     +326     
- Partials      2125     2170      +45     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.