fix(fuselage): remove flicker in closing animations in MultiSelect and AutoComplete components

[vmridul]

Problem

When closing the dropdown in MultiSelect and Autocomplete, there was a quick flicker at the end — the dropdown would flash back to fully visible for a split second before finally disappearing.

Root Cause

The exit animation itself was working fine and playing all the way through. The problem was happening right after the animation finished. The browser resets the element back to its original state. That brief reset is what caused the visible flicker.

Proposed changes (including videos or screenshots)

Added animation-fill-mode: forwards to AnimatedVisibility. This tells the browser to hold the final frame of the animation (fully hidden) instead of resetting back to visible.

Affected Components

AutoComplete
MultiSelect
PaginatedMultiSelectFiltered
PaginatedSelectFiltered

Screen Recordings:

Before:
https://github.com/user-attachments/assets/1061d0fb-2a39-40cb-823c-eeba96ffb75c

After:
https://github.com/user-attachments/assets/2feb32f8-0b89-4bf2-9f82-098226c2ea79

Issue(s)

Further comments

[changeset-bot]

🦋 Changeset detected

Latest commit: 0ae9b1a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@rocket.chat/fuselage	Patch

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[CLAassistant]

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[dougfabris]

@vmridul can u add a changeset?