fix(mobile): keep the collapsed Android rail square (#26039)

Author: PixPMusic

apps/mobile/modules/t3-native-controls/android/src/main/java/expo/modules/t3nativecontrols/T3WorkspaceNavigationModule.kt

@@ -284,6 +284,7 @@ class T3WorkspaceNavigationView(
       },
     ) {
       val fraction = progress.coerceIn(0f, 1f)
+      val railShape = RoundedCornerShape(topEnd = 16.dp * fraction, bottomEnd = 16.dp * fraction)
       if (fraction > 0f) {
         Scrim(
           contentDescription = "Close navigation rail",
@@ -295,8 +296,8 @@ class T3WorkspaceNavigationView(
         Modifier
           .fillMaxHeight()
           .width(lerp(RAIL_WIDTH, EXPANDED_RAIL_WIDTH, progress.coerceAtLeast(0f)))
-          .shadow(RAIL_SHADOW * fraction, RAIL_EXPANDED_SHAPE, clip = false)
-          .background(Color(containerColor), RAIL_EXPANDED_SHAPE)
+          .shadow(RAIL_SHADOW * fraction, railShape, clip = false)
+          .background(Color(containerColor), railShape)
           .padding(top = safeAreaTop.dp, bottom = safeAreaBottom.dp + 12.dp)
           .selectableGroup(),
       ) {
@@ -437,7 +438,6 @@ class T3WorkspaceNavigationView(
     val FAB_SIZE = 48.dp
     val ICON_SIZE = 24.dp
     val RAIL_SHADOW = 6.dp
-    val RAIL_EXPANDED_SHAPE = RoundedCornerShape(topEnd = 16.dp, bottomEnd = 16.dp)
     const val DISABLED_ALPHA = 0.4f
 
     // Labels fade in over the second half of the widening, once there is room for them, and