Show transcript scroll chips after meetings end

[ComputelessComputer]

Allows transcript top and bottom scroll chips to render for inactive sessions while preserving live-only auto-scroll behavior. Adds regression coverage for both chip directions.

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Note

Low Risk
Small UI change in transcript scrolling with existing guards preserved; no auth, data, or API impact.

Overview
Transcript scroll chips (“Go to top” / “Go to bottom”) now appear for inactive sessions when the user scrolls away from an edge, not only while a meeting is live.

Chip visibility no longer depends on currentActive; it still respects floating chat (FloatingOpen hides chips) and adds a canScrollTranscript guard so chips stay hidden when the viewport is effectively at both top and bottom. Live-only behavior is unchanged: auto-scroll and pinning the last transcript to the end remain tied to currentActive.

Regression tests cover top and bottom chips with currentActive={false}.

^{Reviewed by Cursor Bugbot for commit 3fe0ce3. Bugbot is set up for automated code reviews on this repo. Configure here.}

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This is part 1 of 2 in a stack made with GitButler:

•  2  Replace transcript scroll chips with side controls #5882
•  1  Show transcript scroll chips after meetings end #5881 👈

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Cursor Bugbot has reviewed your changes using default effort and found 2 potential issues.

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