Hardens ProcessManager finalisation, ensures stdout/stderr pipe write-ends
close after spawn, sets termination handlers before run(), and fixes the
runCaptured continuation hand-off for fast exits. Resolves the Stage 3
prompt stream being dropped and the handheld fixture UI not advancing,
unskips and repairs the handheld UI test, and fixes averaging panel
accessibility. Includes the selected #52 profile, verification, and
artefact-gating fixes.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Add the Stage 4/5 native workflow: deterministic colprof/applycal/iccgamut
and profcheck argv builders, verification history with CSV export and drift
analytics, user/system ColorSync profile installation, and the matching
SwiftUI views and fixture-driven tests. All Argyll interaction remains
AGPL-isolated via ProcessManager subprocesses.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
gronod
