P1 - Tools screen no longer exposes dead 'coming with the feature build'
cards. Replaced the stale Calibration and Units/Feedback cards with a
single working Settings card that opens the Settings screen.
P1 - Detailed (4-point) calibration now validates rotation quality, not
just the final mean. A 4-point set holds two independent 180-flip bias
estimates - the (0,180) and (90,270) pairs; a malformed turn makes them
diverge even when the mean stays small (which the 3-degree magnitude
guard can't see). isRotationConsistent rejects divergence beyond 0.4
degrees. The disagreement scales with the surface's true tilt, so it's
lenient near level and strict on a steeper permitted surface. Test
proves a deliberately 10-degree-over-rotated set is rejected and a clean
set passes.
P2 - Calibration persistence moved from the screen's rememberCoroutineScope
to a container-owned applicationScope, so the write survives an immediate
Done/back after 'saved'. Preference writes moved there too.
Cleanup: haptic copy is mode-neutral ('when the level locks'); Settings
no longer keeps the screen awake (calibration still does); calibration
method renamed Thoroughness -> Method with Standard/Detailed labels and
accurate 'Four positions, a quarter-turn apart' / 'Averages more sensor
noise' copy; lime now marks the active-calibration status (confirmed
state), consistent with lime = level/confirmed.
64 tests passing; assembleDebug clean; verified on device.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
thejayman77
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