Keep the sync button's copy-age test inside today

Two tests made a copy five minutes old. Just after midnight UTC that copy
is from yesterday, so the tooltip adds its date and the expected text no
longer matches. The copy time now stops at midnight.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
9f27da86d6Dara Adedeji committed on 10/22/2026, 12:30:42 AMparente8edb7d

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