test(gpui): pin the clock in the same-second diagnostics report test

[richiemcilroy]

diagnostics::tests::reports_in_the_same_second_do_not_collide read the wall clock once per report, so whenever a second boundary fell between its two writes the stamps differed and the test failed. It has been failing other PRs' Intel macOS desktop job intermittently (e.g. #2664 and #2673: left: Some(1792431796) right: Some(1792431797)).

write_report_into now takes the time from a small write_report_at(dir, report, stamp), and the test passes the same second to both writes. Production behaviour is unchanged: write_report_into still stamps with SystemTime::now().

cargo test --bin cap-gpui -- diagnostics: 14 passed.

Confidence Score: 5/5

This PR appears safe to merge.

Summary

Makes reports_in_the_same_second_do_not_collide independent of the wall clock.

• The same-second report test uses one fixed timestamp for both writes.

_{Reviews (1) · Last reviewed commit: "test(gpui): pin the clock in the same-se..." · Reviewed by Greptile}

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Project	Deployment	Actions	Updated
cap-status	Ready	Preview	Oct 19, 2026 6:03pm UTC

[capy-ai]

Capy found no issues.