dismissalProgress

Observable state of the dismissal progress (0.0 to 1.0).

When a better route is suggested, the user has limited time to accept or reject it. This progress indicates how much time is left before the suggestion is automatically dismissed:

• 1.0 = suggestion just appeared, full time remaining

• 0.0 = timeout reached, suggestion will be auto-dismissed

The progress bar in the UI decreases from full to empty as time runs out. Updates periodically for smooth progress animations.