fix: add correct spacing around calendar day header

packages/flutter_availability/lib/src/ui/widgets/calendar.dart

@@ -113,7 +113,7 @@ class CalendarView extends StatelessWidget {
     return Column(
       children: [
         monthDateSelector,
-        const Divider(),
+        const Divider(height: 1),
         const SizedBox(height: 20),
         calendarGrid,
       ],

packages/flutter_availability/lib/src/ui/widgets/calendar_grid.dart

@@ -43,28 +43,26 @@ class CalendarGrid extends StatelessWidget {
       return translations.weekDayAbbreviatedFormatter(context, day);
     });
 
-    var calendarDaysRow = GridView.builder(
+    var calendarDaysRow = Row(
-      padding: EdgeInsets.zero,
+      children: List.generate(13, (index) {
-      shrinkWrap: true,
+        // This adds a space between the days of the week
-      itemCount: 7,
+        if ((index % 2).isOdd) return const SizedBox(width: 12);
-      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+
-        crossAxisCount: 7,
+        var day = dayNames[index ~/ 2];
-        crossAxisSpacing: 12,
+        return Expanded(
-        mainAxisSpacing: 0,
+          child: Text(
-      ),
-      itemBuilder: (context, index) {
-        var day = dayNames[index];
-        return Text(
             day,
             style: textTheme.bodyLarge,
             textAlign: TextAlign.center,
+          ),
         );
-      },
+      }),
     );
 
     return Column(
       children: [
         calendarDaysRow,
+        const SizedBox(height: 10),
         GridView.builder(
           padding: EdgeInsets.zero,
           shrinkWrap: true,