Users can redo emoji reactions created by other users

[PAVANT009]

When a user adds an emoji reaction, another user can redo/modify the same reaction.

Steps to reproduce:

1. User A adds an emoji reaction
2. User B clicks the same emoji
3. The reaction appears as if User B can redo User A's reaction

Expected behavior:
Each reaction should belong only to the user who created it.

Actual behavior:
Other users can redo reactions created by someone else.

[PAVANT009]

“PR: #4 — fixes reaction toggles by preserving reactedByMe on realtime updates and correcting optimistic up
dates; also switches workspace listing to M2M to avoid empty org lists.”