Emotes continue playing when changing tabs and repeat indefinitely

## Description

When previewing emotes in the Settings UI, the emote animations exhibit incorrect behavior:

1. **Emotes continue playing when changing selections/tabs** — switching between different emotes or tabs does not stop the previous emote animation
2. **Repeating emotes continue indefinitely** — emotes that loop do not stop and keep playing

## Expected Behavior

- When switching between emote selections or tabs, the current emote animation should stop
- Repeating/looping emotes should stop when the user navigates away or selects a different emote

## Evidence

A video recording demonstrating the issue is available (Screencast_20260421_104904.webm) and should be attached to this issue.

## Related Issues

- #725 — Camera position bug when switching to emotes tab

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Requested by Lucas Franca do Nascimento Farias via Slack