fix: hide the trailing dial button when a tile is expanded

The always-visible trailing dial button duplicated the inline Audio call
action once the actions bar was expanded. It is a quick affordance for the
collapsed row, so hide it (and the fallback menu button) while expanded -
the inline bar already exposes those actions.

Author: SERDUN

lib/widgets/call/call_tile.dart

@@ -289,7 +289,10 @@ class _CallTileState extends State<CallTile> {
                         ],
                       ),
                     const SizedBox(width: 4),
-                    if (widget.gesturesEnabled)
+                    // The trailing dial/menu button is a quick affordance for the
+                    // collapsed row; when expanded the inline bar already covers
+                    // these actions, so it is hidden to avoid duplication.
+                    if (widget.gesturesEnabled && !widget.expanded)
                       if (widget.onDialPressed != null)
                         IconButton(
                           onPressed: widget.onDialPressed,

test/widgets/call/call_tile_test.dart

@@ -120,6 +120,13 @@ void main() {
       expect(dialed, isTrue);
     });
 
+    testWidgets('dial button is hidden when expanded', (tester) async {
+      await tester.pumpWidget(buildTestable(buildTile(expanded: true, onDialPressed: () {})));
+      await tester.pumpAndSettle();
+
+      expect(find.byIcon(Icons.call), findsNothing);
+    });
+
     testWidgets('dial button shows custom dialIcon when provided', (tester) async {
       var dialed = false;
       await tester.pumpWidget(buildTestable(buildTile(onDialPressed: () => dialed = true, dialIcon: Icons.videocam)));