fix(mobile): review file navigation respects reduced motion

apps/mobile/modules/t3-review-diff/android/src/main/java/expo/modules/t3reviewdiff/T3ReviewDiffView.kt

@@ -483,6 +483,7 @@ class T3ReviewDiffView(context: Context, appContext: AppContext) : ExpoView(cont
       )
       postInvalidateOnAnimation()
     } else {
+      verticalScroller.forceFinished(true)
       canvasView.setVerticalOffset(target)
     }
   }

apps/mobile/modules/t3-review-diff/tests/android/src/test/kotlin/expo/modules/t3reviewdiff/ReviewDiffViewportTest.kt

@@ -22,6 +22,30 @@ import org.robolectric.annotation.Config
 @RunWith(RobolectricTestRunner::class)
 @Config(sdk = [35], manifest = Config.NONE)
 class ReviewDiffViewportTest {
+  @Test
+  fun immediateNavigationStopsAnActiveFling() {
+    val activity = Robolectric.buildActivity(Activity::class.java).setup().get()
+    val view = T3ReviewDiffView(activity, AppContext())
+    val scroller = view.javaClass.getDeclaredField("verticalScroller").apply {
+      isAccessible = true
+    }.get(view) as android.widget.OverScroller
+    try {
+      scroller.fling(0, 100, 0, 2000, 0, 0, 0, 10000)
+      assertTrue(!scroller.isFinished)
+      view.scrollToTop(false)
+      view.computeScroll()
+      val canvas = view.getChildAt(0)
+      val offset = canvas.javaClass.getDeclaredMethod("verticalOffset").apply {
+        isAccessible = true
+      }.invoke(canvas)
+      assertEquals(0, offset)
+      assertTrue(scroller.isFinished)
+    } finally {
+      view.cleanup()
+      activity.finish()
+    }
+  }
+
   @Test
   fun resetDiscardsOldRowsAndPendingDecodeBeforePublishingTheNewDestination() {
     val activity = Robolectric.buildActivity(Activity::class.java).setup().get()

apps/mobile/src/features/review/ReviewSheet.tsx

@@ -22,6 +22,7 @@ import {
   View,
 } from "react-native";
 import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { useReduceMotionEnabled } from "../../lib/appState";
 import { useNativeColumnLayoutMetrics } from "../../native/native-layout-metrics";
 import { NativeInspectorContent } from "../../native/NativeInspectorContent";
 
@@ -423,6 +424,7 @@ type ReviewSheetProps = StaticScreenProps<{
 }>;
 
 export function ReviewSheet(props: ReviewSheetProps) {
+  const reduceMotion = useReduceMotionEnabled();
   const { nativeReviewDiffStyle } = useAppearanceCodeSurface();
   useAdaptiveWorkspacePaneRole("inspector");
   const { panes } = useAdaptiveWorkspaceLayout();
@@ -542,7 +544,9 @@ export function ReviewSheet(props: ReviewSheetProps) {
     const nativeView = nativeReviewDiffViewRef.current;
     if (!nativeView) return;
     const result = await settlePromise(() =>
-      fileId === null ? nativeView.scrollToTop(true) : nativeView.scrollToFile(fileId, true),
+      fileId === null
+        ? nativeView.scrollToTop(!reduceMotion)
+        : nativeView.scrollToFile(fileId, !reduceMotion),
     );
     if (AsyncResult.isFailure(result)) {
       console.error("[review] Failed to navigate to diff file", squashAtomCommandFailure(result));