fix: The modal should overlay the Scaffold as well

lib/src/ui/pages/calendar.dart

@@ -82,7 +82,6 @@ class CalendarPageState extends State<CalendarPage> {
       SliverToBoxAdapter(
         child: Padding(
           padding: const EdgeInsets.only(
-            left: 0,
             right: 16,
             top: 20,
             bottom: 4,
@@ -168,27 +167,31 @@ class CalendarPageState extends State<CalendarPage> {
           setState(() {});
         }
       },
-      child: Scaffold(
+      child: WillPopScope(
-        appBar: AppBar(
+        onWillPop: () async => !context.read<CalendarBloc>().state.refreshing,
-          title: Text(t.calendar.calendar),
+        child: Stack(
-          actions: [
-            IconButton(
-              onPressed: () {
-                context.read<CalendarBloc>().add(RefreshPerformedEvent());
-              },
-              icon: const Icon(Icons.refresh),
-            ),
-          ],
-        ),
-        drawer: getDrawer(context),
-        body: Stack(
           children: [
             Positioned(
               left: 8,
               right: 8,
               top: 0,
               bottom: 0,
-              child: CustomScrollView(
+              child: Scaffold(
+                appBar: AppBar(
+                  title: Text(t.calendar.calendar),
+                  actions: [
+                    IconButton(
+                      onPressed: () {
+                        context
+                            .read<CalendarBloc>()
+                            .add(RefreshPerformedEvent());
+                      },
+                      icon: const Icon(Icons.refresh),
+                    ),
+                  ],
+                ),
+                drawer: getDrawer(context),
+                body: CustomScrollView(
                   slivers: [
                     // Render all available weekdays
                     ..._renderWeekdayList(
@@ -242,6 +245,7 @@ class CalendarPageState extends State<CalendarPage> {
                   ],
                 ),
               ),
+            ),
             Positioned(
               left: 0,
               right: 0,