[Bottom Sheet] Reset wantsHighFrameRateIdle on pan gesture end (#2250)

When an in-flight spring animation is interrupted via completeAnimationsIfNeeded(),
the completion block that resets wantsHighFrameRateIdle is never called. Reset the
flag in .ended/.cancelled/.failed to ensure it doesn't remain enabled past the
gesture lifecycle.

Co-authored-by: Lukas Capkovic <lucapkov@microsoft.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

Sources/FluentUI_iOS/Components/BottomSheet/BottomSheetController.swift

@@ -986,6 +986,9 @@ public class BottomSheetController: UIViewController, Shadowable, TokenizedContr
             sender.setTranslation(.zero, in: view)
         case .ended, .cancelled, .failed:
             completePan(with: sender.velocity(in: view).y)
+            if #available(iOS 18.0, visionOS 2.0, *), usesCustomSpringAnimator && usesHighFrameRatePanning {
+                sheetAnimator.wantsHighFrameRateIdle = false
+            }
         default:
             break
         }