LucianoDev 9a593e4ff2 fix: stop UI freeze when selecting a pump that needs immobilizer unlock ...

Phase 2 TestUnlock handshake was synchronous (Thread.Sleep x 8 = 4 s) and
the continuation after Phase 1 marshalled back to the WPF dispatcher via
the captured SynchronizationContext, so the eight 500 ms sleeps froze the
UI right before unlock completed.

- UnlockService.RunTestUnlockSequence -> async RunTestUnlockSequenceAsync
  with Task.Delay(500, ct) and ConfigureAwait(false)
- Add ConfigureAwait(false) on every internal await in UnlockService so
  continuations no longer hop to the UI thread (Task.WhenAll, Task.Delay,
  connectedTcs, TryFastUnlockAsync, fast-unlock settle delay)
- CancellationToken now propagates through Phase 2, so the snackbar Cancel
  button can interrupt the handshake within 500 ms instead of waiting out
  all eight Thread.Sleeps

Includes the companion observer in IUnlockService / UnlockService
(PumpUnlocked event, IsPumpUnlocked, StartObserver/StopObserver) that
the Phase 1 wait now races against — lets any source of unlock (fast
unlock, external manual, CAN flood finally working) short-circuit the
600 s timer as soon as the CAN TestUnlock parameter confirms it.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

2026-04-22 14:36:45 +02:00

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