スクロールが上に吹っ飛ぶバグを修正

[nokhnaton]

スタンプのバグはまだ直してない
ここでrevertして修正して修正した部分を、revertしないで修正
ここのrevertで「ここから未読」の位置を修正し、未読を消す処理ごとrevertされてるので、これを戻してこのPRを入れたら直るはず
#4562

[github-actions]

Preview (prod) → https://4565-prod.traq-preview.trapti.tech/
Preview (dev) → https://4565-dev.traq-preview.trapti.tech/

[nokhnaton]

あれ?スタンプのバグ直ってそう?よくわからん

[codecov]

Codecov Report

❌ Patch coverage is 0% with 35 lines in your changes missing coverage. Please review.
✅ Project coverage is 11.90%. Comparing base (98d2ffb) to head (d9607b6).
⚠️ Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
...MessagesScroller/composables/useMessagesFetcher.ts	0.00%	17 Missing ⚠️
...ain/MainView/MessagesScroller/MessagesScroller.vue	0.00%	13 Missing ⚠️
...ponents/Main/MainView/QallView/QallMessageView.vue	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4565      +/-   ##
==========================================
- Coverage   11.91%   11.90%   -0.01%     
==========================================
  Files         695      695              
  Lines       31182    31206      +24     
  Branches      616      616              
==========================================
  Hits         3714     3714              
- Misses      27456    27480      +24     
  Partials       12       12              

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[Takeno-hito]

元々の PR はこれ #4395

#4395 -> #4562 で一部コミット revert → フォローアップで今なはず