Use fixed height for full size link previews

[gpunto]

Goal

This avoids a jump when entering a chat with a link preview

Implementation

height instead of heightIn

🎨 UI Changes

Before	After
Screen_recording_20260309_155229.webm	Screen_recording_20260309_155142.webm

Testing

Open chats where there is a visible (full size) link preview

[github-actions]

PR checklist ✅

All required conditions are satisfied:

• Title length is OK (or ignored by label).
• At least one pr: label exists.
• Sections ### Goal, ### Implementation, and ### Testing are filled.

🎉 Great job! This PR is ready for review.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-chat-android-client	5.25 MB	5.69 MB	0.44 MB	🟡
stream-chat-android-ui-components	10.60 MB	11.00 MB	0.40 MB	🟡
stream-chat-android-compose	12.81 MB	12.03 MB	-0.78 MB	🚀

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud