enhance(frontend): 添付画像のサムネイルを領域いっぱいに表示できるように

[kakkokari-gtyih]

What

デフォルトオフ

添付画像のサムネイルを、領域に対してcontainではなくcoverして表示できるようにするオプション

Why

縦横比の関係で実際の領域より小さく表示されてしまうのが不便な人向け

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 1 line in your changes missing coverage. Please review.
✅ Project coverage is 14.72%. Comparing base (5cb3a91) to head (c670f3a).
⚠️ Report is 70 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/frontend/src/components/MkMediaList.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop   #17256       +/-   ##
============================================
- Coverage    63.79%   14.72%   -49.07%     
============================================
  Files         1162      242      -920     
  Lines       116402    11795   -104607     
  Branches      8446     3980     -4466     
============================================
- Hits         74259     1737    -72522     
+ Misses       39944     7900    -32044     
+ Partials      2199     2158       -41     

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[syuilo]

/preview

[syuilo]

/preview

[syuilo]

頻繁に変えるものではなさそうだから非リアクティブな参照でも良さそうな気はするわね

[kakkokari-gtyih]

頻繁に変えるものではなさそうだから非リアクティブな参照でも良さそうな気はするわね

ノート系の設定が（何故か）リアクティブが使われている箇所が多かったので倣った