thread view: Fix some design papercuts (#36893)

Release Notes:

- N/A

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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Matt Miller <mattrx@gmail.com>
949398cb93Danilo Leal committed on 8/25/2025, 7:07:30 PM· committed by GitHubparent79e74b8
5 files changedLine totals unavailable