agent_ui: Improve onboarding to the import threads feature (#52748)

Release Notes:

- N/A

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Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
ebb451ec7bDanilo Leal committed on 3/31/2026, 7:10:56 AM· committed by GitHubparent6a95e29
8 files changedLine totals unavailable