perf: prevent unmounting MessageBubble when STR happens

[isekovanic]

🎯 Goal

This PR provides a performance improvement for the swipe-to-reply functionality, where we keep:

• Keeps scrolling performance the same (animated views do not pollute the virtual DOM)
• Renders only one Animated.View (conditionally)
• Animates through pushing out the rest of the content rather than displaying old content

🛠 Implementation details

🎨 UI Changes

iOS

Before	After

Android

Before	After

🧪 Testing

☑️ Checklist

• I have signed the Stream CLA (required)
• PR targets the develop branch
• Documentation is updated
• New code is tested in main example apps, including all possible scenarios
  • SampleApp iOS and Android
  • Expo iOS and Android

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
js_bundle_size	292 KB	292 KB	0 B	🟢