Added BoxDecorations to Custom Theme

lib/core/custom_theme.dart

@@ -8,6 +8,19 @@ class CustomTheme {
   static Color onBoxColor = const Color(0xFF181818);
   static Color boxBorder = const Color(0xFF272727);
 
+  static BoxDecoration standardBoxDecoration = BoxDecoration(
+    color: CustomTheme.boxColor,
+    border: Border.all(color: CustomTheme.boxBorder),
+    borderRadius: BorderRadius.circular(12),
+  );
+
+  static BoxDecoration highlightedBoxDecoration = BoxDecoration(
+    color: CustomTheme.boxColor,
+    border: Border.all(color: Colors.blue),
+    borderRadius: BorderRadius.circular(12),
+    boxShadow: [BoxShadow(color: Colors.blue.withAlpha(120), blurRadius: 12)],
+  );
+
   static AppBarTheme appBarTheme = AppBarTheme(
     backgroundColor: backgroundColor,
     foregroundColor: Colors.white,

lib/presentation/widgets/tiles/group_tile.dart

@@ -15,19 +15,8 @@ class GroupTile extends StatelessWidget {
       margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
       padding: const EdgeInsets.symmetric(vertical: 5, horizontal: 10),
       decoration: isHighlighted
-          ? BoxDecoration(
-              color: CustomTheme.boxColor,
-              border: Border.all(color: Colors.blue),
-              borderRadius: BorderRadius.circular(12),
-              boxShadow: [
-                BoxShadow(color: Colors.blue.withAlpha(120), blurRadius: 12),
-              ],
-            )
-          : BoxDecoration(
-              color: CustomTheme.boxColor,
-              border: Border.all(color: CustomTheme.boxBorder),
-              borderRadius: BorderRadius.circular(12),
-            ),
+          ? CustomTheme.highlightedBoxDecoration
+          : CustomTheme.standardBoxDecoration,
       duration: const Duration(milliseconds: 150),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,