チャットのレイアウトの調整

[4ster1sk]

• チャット一覧でListTileを使うように変更しました
• PushableListViewでsinceIdになっていたのをuntilIdに変更しました
• ルーム名などを更新後に更新完了ダイアログを表示するようにしました

• チャットのホーム画面での視認性を確保するため、SimpleMfmTextの表示を最大5行に制限していますが、mfm_renderer側のPRの適用が必要になります。

Fix: #822, #837, #838, #840

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 2.81690% with 69 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.43%. Comparing base (404db57) to head (e55f45a).

Files with missing lines	Patch %	Lines
lib/view/chat_page/chat_home_page.dart	2.00%	49 Missing ⚠️
lib/view/chat_page/chat_content.dart	0.00%	12 Missing ⚠️
lib/view/chat_page/room_info.dart	0.00%	4 Missing ⚠️
lib/l10n/app_localizations_ja.dart	33.33%	2 Missing ⚠️
lib/l10n/app_localizations_zh.dart	0.00%	2 Missing ⚠️
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Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #808   +/-   ##
========================================
  Coverage    28.43%   28.43%           
========================================
  Files          370      370           
  Lines        21864    21866    +2     
========================================
+ Hits          6216     6217    +1     
- Misses       15648    15649    +1     

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