[CIS-2024, CIS-2000] Fix Channel List pagination gaps + Truncated channels moved to bottom

[nuno-vieira]

🔗 Issue Links

CIS-2024
CIS-2000
#2358

🎯 Goal

• Fix channel list pagination gaps by introducing fetchLimit and fetchBatchSize in the channel list fetch request.
• Fix truncated channels being moved to the bottom of the channel list because of the wrong lastMessageAt value being used in defaultSortingAt.

🧪 Manual Testing Notes

Truncation fix:

• Open a channel
• Truncate the top channel
• It should not be moved to the bottom

Pagination fix:

• Load multiple channels (Keep scrolling to the bottom)
• Restart the app
• The channel list should only contain the first 20 channels, and not all channels which are in the local cache
• When loading more channels, it should keeping loading 20 by 20

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change follows zero ⚠️ policy (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (docusaurus, tutorial, CMS)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication