fix/mark-as-unread-qa

[OnestarLee]

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[TICKET_ID]

Description Of Changes

• QA 버그 수정
• NewMessageButton, UnreadMessageFloating에서 카운트가 100이상일경우 99+ 로 표시하도록 수정

Types Of Changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply_

• Bugfix
• New feature
• Documentation (correction or otherwise)
• Cosmetics (whitespace, appearance (ex) Prettier)
• Build configuration
• Improvement (refactor code)
• Test

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 28 lines in your changes missing coverage. Please review.

Project coverage is 11.25%. Comparing base (9650e6a) to head (0108698).

Files with missing lines	Patch %	Lines
...groupChannel/component/GroupChannelMessageList.tsx	0.00%	17 Missing ⚠️
...act-native/src/localization/createBaseStringSet.ts	0.00%	11 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                   @@
##           feat/mark-as-unread     #248      +/-   ##
=======================================================
- Coverage                11.27%   11.25%   -0.03%     
=======================================================
  Files                      360      360              
  Lines                     8653     8672      +19     
  Branches                  2454     2463       +9     
=======================================================
  Hits                       976      976              
- Misses                    7601     7620      +19     
  Partials                    76       76              

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[Copilot]

Pull Request Overview

This PR fixes QA bugs related to unread/new message indicators by capping counts at “99+” and refines the mark-as-unread floating indicator behavior.

• Updates localization strings to display “99+” when counts ≥ 100 for both new and unread message labels.
• Enhances GroupChannelMessageList to track scroll position and viewable messages for better mark-as-unread logic.
• Removes a fixed height from the new-line renderer container to let its content size naturally.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/uikit-react-native/src/localization/createBaseStringSet.ts	Capped message counts at 99+ and refactored singular/plural logic.
packages/uikit-react-native/src/domain/groupChannel/component/GroupChannelMessageList.tsx	Added refs and effects to track unread state and scroll events.
packages/uikit-react-native/src/components/GroupChannelMessageRenderer/GroupChannelMessageNewLine.tsx	Removed hardcoded container height.

Comments suppressed due to low confidence (2)

packages/uikit-react-native/src/domain/groupChannel/component/GroupChannelMessageList.tsx:37

• [nitpick] The name isNewLineExistInChannelRef is awkward; consider renaming it to hasNewLineInChannelRef for clearer boolean semantics.

  const isNewLineExistInChannelRef = useRef(false);

packages/uikit-react-native/src/domain/groupChannel/component/GroupChannelMessageList.tsx:235

• viewableMessages.current is never set before this effect, so isNewLineExistInChannelRef will remain false. Ensure you populate viewableMessages.current (e.g., in an onViewableItemsChanged callback) before relying on it.

    isNewLineExistInChannelRef.current = !!props.isNewLineExistInChannel && !!viewableMessages.current;