Fix: unread dot not appearing correctly

[namumakwembo]

Unread Messages Dot Fix

• Fixed an issue where the unread message dot would incorrectly display even when there were no unread messages.
• The logic was adjusted to ensure the dot only shows when there are unread messages for the current user.

Participant Bug Fixes

• Addressed a bug in the participant retrieval process where global scopes were not properly bypassed, causing errors when fetching participants who had exited the conversation.
• Ensured that the withoutGlobalScopes flag works as intended, allowing participants to be fetched even if they have exited the conversation.