Add support for enabling message list view animations

[nuno-vieira]

🔗 Issue Links

Resolves https://stream-io.atlassian.net/browse/PBE-5174

🎯 Goal

Add support for enabling message list animations as requested by some customers.

🧪 Manual Testing Notes

1. Login
2. Open a Channel
3. Send a message
4. Load more messages
5. No animations should be present
6. Logout
7. Go to configration screen
8. Enable animations
9. Repeat 2, 3, 4
10. Should have animations

☑️ Contributor Checklist

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

[Stream-SDK-Bot]

StreamChat XCMetrics

target	metric	benchmark	branch	performance	status
MessageList	Hitches total duration	10 ms	5.01 ms	49.9% 🔼	🟢
	Duration	2.6 s	2.55 s	1.92% 🔼	🟢
	Hitch time ratio	4 ms per s	1.97 ms per s	50.75% 🔼	🟢
	Frame rate	75 fps	78.29 fps	4.39% 🔼	🟢
	Number of hitches	1	0.4	60.0% 🔼	🟢
ChannelList	Hitches total duration	12.5 ms	9.18 ms	26.56% 🔼	🟢
	Duration	2.6 s	2.54 s	2.31% 🔼	🟢
	Hitch time ratio	5 ms per s	3.61 ms per s	27.8% 🔼	🟢
	Frame rate	72 fps	74.17 fps	3.01% 🔼	🟢
	Number of hitches	1.2	1.0	16.67% 🔼	🟢

[laevandus]

Tried it with animations enabled but seems like it is not very smooth because the timestamp appears for a split second. Should we fix that separately?
https://github.com/user-attachments/assets/9727115e-419b-4205-bf3e-9191ced5d893

[martinmitrevski]

Should we put some disclaimer that if you enable this mode, you're in control of the animations (and the possible glitches)?

[nuno-vieira]

Tried it with animations enabled but seems like it is not very smooth because the timestamp appears for a split second. Should we fix that separately? https://github.com/user-attachments/assets/9727115e-419b-4205-bf3e-9191ced5d893

Yes, this is one of the cons of having this enabled. The customer is fine with this, so at least we give this flexibility to customers in case they want to customize it. And maybe for their UI is not that bad. The biggest problem is really loading previous messages, sometimes the messages float around.

[sonarcloud]

Quality Gate passed

Issues
140 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.2% Coverage on New Code
0.1% Duplication on New Code

See analysis details on SonarCloud