feat: add TvFocusableCard widget for interactive focus and hover effects.

lib/core/widgets/tv_focusable_card.dart

@@ -93,6 +93,8 @@ class _TvFocusableCardState extends State<TvFocusableCard>
             child: child,
           );
         },
+        child: Material(
+          color: Colors.transparent,
           child: InkWell(
             onTap: widget.onTap,
             onFocusChange: _handleFocusChange,
@@ -132,6 +134,7 @@ class _TvFocusableCardState extends State<TvFocusableCard>
             ),
           ),
         ),
+      ),
     );
   }
 }