Address MoveToRegion review feedback

- Reduce code duplication: MoveToRegion(MapSpan) now delegates to
  MoveToRegion(MapSpan, bool) with animated=true
- Add antimeridian crossing unit test to verify MapSpan.FromLocations
  correctly handles points near ±180° longitude

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jfversluis

src/Controls/Maps/src/Map.cs

@@ -259,16 +259,7 @@ public IEnumerator<IMapPin> GetEnumerator()
 		/// </summary>
 		/// <param name="mapSpan">A <see cref="MapSpan"/> object containing details on what region should be shown.</param>
 		/// <exception cref="ArgumentNullException">Thrown when <paramref name="mapSpan"/> is <see langword="null"/>.</exception>
-		public void MoveToRegion(MapSpan mapSpan)
-		{
-			if (mapSpan is null)
-			{
-				throw new ArgumentNullException(nameof(mapSpan));
-			}
-
-			_lastMoveToRegion = mapSpan;
-			Handler?.Invoke(nameof(IMap.MoveToRegion), new MoveToRegionRequest(_lastMoveToRegion, true));
-		}
+		public void MoveToRegion(MapSpan mapSpan) => MoveToRegion(mapSpan, true);
 
 		/// <summary>
 		/// Adjusts the viewport of the map control to view the specified region, with control over animation.

src/Controls/tests/Core.UnitTests/MapTests.cs

@@ -1066,5 +1066,21 @@ public void IMap_LastUserLocation_ReturnsMapLastUserLocation()
 		}
 
 		#endregion
+
+		[Fact]
+		public void FromLocationsHandlesAntimeridianCrossing()
+		{
+			// Points near the antimeridian (179° and -179° should result in a small span, not 358°)
+			var locations = new[]
+			{
+				new Location(0, 179),
+				new Location(0, -179)
+			};
+
+			var span = MapSpan.FromLocations(locations);
+
+			// The span should be small (around 2-3 degrees), not 358 degrees
+			Assert.True(span.LongitudeDegrees < 10, $"Expected small longitude span for antimeridian crossing, got {span.LongitudeDegrees}");
+		}
 	}
 }