feat: UI for promoting next user to admin role (WPB-25278)

[sbakhtiarov]

https://wearezeta.atlassian.net/browse/WPB-25278

https://wearezeta.atlassian.net/browse/WPB-25278

What's new in this PR?

New dialog for leave conversation options and screen for selecting next admin user.

Screen_recording_20260513_090643.webm

[github-actions]

@sbakhtiarov looks like you are rolling back kalium to a previous commitish.

This means that the PR's target branch (develop) is using a newer version of Kalium, and the changes in this PR will rollback Kalium to an older version.

develop	This PR
f69a608d5126385b2a1284845657c0bbf11f9c65	c7bc36514a75f7398e0f7f85a981561ec1fb023a

Is this intentional?

[codecov]

Codecov Report

❌ Patch coverage is 72.72727% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.14%. Comparing base (0bb1fbf) to head (9770588).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...i/home/conversationslist/model/GroupDialogState.kt	0.00%	5 Missing ⚠️
...onversations/promoteadmin/PromoteAdminViewModel.kt	85.71%	2 Missing and 2 partials ⚠️

❌ Your patch check has failed because the patch coverage (72.72%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4819      +/-   ##
===========================================
+ Coverage    51.11%   51.14%   +0.03%     
===========================================
  Files          610      611       +1     
  Lines        21091    21124      +33     
  Branches      3392     3397       +5     
===========================================
+ Hits         10780    10804      +24     
- Misses        9299     9306       +7     
- Partials      1012     1014       +2     

Files with missing lines	Coverage Δ
...onversations/promoteadmin/PromoteAdminViewModel.kt	85.71% <85.71%> (ø)
...i/home/conversationslist/model/GroupDialogState.kt	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

---

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[github-actions]

@sbakhtiarov looks like you are rolling back kalium to a previous commitish.

This means that the PR's target branch (develop) is using a newer version of Kalium, and the changes in this PR will rollback Kalium to an older version.

develop	This PR
f69a608d5126385b2a1284845657c0bbf11f9c65	c7bc36514a75f7398e0f7f85a981561ec1fb023a

Is this intentional?

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[ohassine]

should we also consider handle ?

allMembers.filter {
    it.name.contains(searchQuery, true) ||
    it.handle.contains(searchQuery, true)
}