[AND-403] Fix "Thread reply" enabled while in thread.

[VelikovPetar]

🎯 Goal

The "Thread reply" item was wrongly shown as a message option when opening the menu inside a thread.

🛠 Implementation details

• Add the missing check for isInThread in the capability check logic.
• Change the capability check from QUOTE_MESSAGE to SEND_REPLY

🎨 UI Changes

Before	After
before.mp4	after.mp4

🧪 Testing

1. Open a channel
2. Open a thread
3. Long press on a message from the thread
4. The "Thread reply" item should not be visible

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-chat-android-client	3.18 MB	3.18 MB	0.00 MB	🟢
stream-chat-android-offline	3.39 MB	3.39 MB	0.00 MB	🟢
stream-chat-android-ui-components	7.89 MB	7.89 MB	0.00 MB	🟢
stream-chat-android-compose	9.92 MB	9.92 MB	0.00 MB	🟢

[sonarqubecloud]

Quality Gate failed

Failed conditions
68.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud