* Split CI: GitHub runners for tests, Depot for perf regression
Unit/UI tests move to macos-15 (no queue wait, fast enough for test
suites). Typing-lag regression stays on Depot in a new tests-depot job
(needs stronger hardware). No duplicated test work between the two.
* Fix Xcode selection: add pipefail guard, use sort|tail for consistency
Address review comments:
- tests job: add || true to ls pipeline so fallback works under pipefail
- tests-depot job: use sort | tail -n 1 instead of head -n 1
* Move XCUITests from GitHub runner to Depot
tests (macos-15) now runs unit tests only. tests-depot (Depot) runs
UI tests and the typing-lag regression, reusing the same build.
225588ccfc