refactored HTTP error handling and streamlined UI components by centralizing shared logic and removing redundant parameters

lib/view/pages/timetable/widgets/calendar/outside_chips.dart

@@ -78,39 +78,12 @@ class _OutsideDayColumn extends StatelessWidget {
   });
 
   void _showOverflow(BuildContext context, List<Appointment> hidden) {
-    showDetailsBottomSheet(
+    _showAppointmentOverflowSheet(
       context,
-      children: (sheetCtx) {
-        final tiles = <Widget>[];
-        for (var i = 0; i < hidden.length; i++) {
-          if (i > 0) tiles.add(const Divider(height: 1));
-          final apt = hidden[i];
-          tiles.add(
-            ListTile(
-              leading: Container(
-                width: 12,
-                height: 12,
-                decoration: BoxDecoration(
-                  color: apt.color,
-                  borderRadius: BorderRadius.circular(3),
-                ),
-              ),
-              title: Text(
-                apt.subject,
-                style: isCrossedOut(apt)
-                    ? const TextStyle(decoration: TextDecoration.lineThrough)
-                    : null,
-              ),
-              subtitle: Text(_subtitleFor(apt)),
-              onTap: () {
-                Navigator.of(sheetCtx).pop();
-                onAppointmentTap(apt);
-              },
-            ),
-          );
-        }
-        return tiles;
-      },
+      hidden,
+      onAppointmentTap: onAppointmentTap,
+      isCrossedOut: isCrossedOut,
+      subtitle: _subtitleFor,
     );
   }
 

lib/view/pages/timetable/widgets/calendar/week_grid.dart

@@ -252,39 +252,12 @@ class _DayColumn extends StatelessWidget {
   ) {
     final sorted = [...appointments]
       ..sort((a, b) => a.startTime.compareTo(b.startTime));
-    showDetailsBottomSheet(
+    _showAppointmentOverflowSheet(
       context,
-      children: (sheetContext) {
-        final tiles = <Widget>[];
-        for (var i = 0; i < sorted.length; i++) {
-          if (i > 0) tiles.add(const Divider(height: 1));
-          final apt = sorted[i];
-          tiles.add(
-            ListTile(
-              leading: Container(
-                width: 12,
-                height: 12,
-                decoration: BoxDecoration(
-                  color: apt.color,
-                  borderRadius: BorderRadius.circular(3),
-                ),
-              ),
-              title: Text(
-                apt.subject,
-                style: isCrossedOut(apt)
-                    ? const TextStyle(decoration: TextDecoration.lineThrough)
-                    : null,
-              ),
-              subtitle: Text(_overflowSubtitle(apt)),
-              onTap: () {
-                Navigator.of(sheetContext).pop();
-                onAppointmentTap(apt);
-              },
-            ),
-          );
-        }
-        return tiles;
-      },
+      sorted,
+      onAppointmentTap: onAppointmentTap,
+      isCrossedOut: isCrossedOut,
+      subtitle: _overflowSubtitle,
     );
   }
 
@@ -388,6 +361,52 @@ class _DayColumn extends StatelessWidget {
   }
 }
 
+/// Shared bottom sheet listing hidden appointments (used by both the in-grid
+/// and outside-hours overflow cells). [appointments] is rendered in the given
+/// order — callers pre-sort as needed.
+void _showAppointmentOverflowSheet(
+  BuildContext context,
+  List<Appointment> appointments, {
+  required void Function(Appointment) onAppointmentTap,
+  required bool Function(Appointment) isCrossedOut,
+  required String Function(Appointment) subtitle,
+}) {
+  showDetailsBottomSheet(
+    context,
+    children: (sheetContext) {
+      final tiles = <Widget>[];
+      for (var i = 0; i < appointments.length; i++) {
+        if (i > 0) tiles.add(const Divider(height: 1));
+        final apt = appointments[i];
+        tiles.add(
+          ListTile(
+            leading: Container(
+              width: 12,
+              height: 12,
+              decoration: BoxDecoration(
+                color: apt.color,
+                borderRadius: BorderRadius.circular(3),
+              ),
+            ),
+            title: Text(
+              apt.subject,
+              style: isCrossedOut(apt)
+                  ? const TextStyle(decoration: TextDecoration.lineThrough)
+                  : null,
+            ),
+            subtitle: Text(subtitle(apt)),
+            onTap: () {
+              Navigator.of(sheetContext).pop();
+              onAppointmentTap(apt);
+            },
+          ),
+        );
+      }
+      return tiles;
+    },
+  );
+}
+
 class _CurrentTimeMarker extends StatelessWidget {
   final DateTime now;
   final PeriodLayout layout;

lib/view/pages/timetable/widgets/timetable_calendar_view.dart

@@ -57,9 +57,6 @@ class TimetableCalendarViewState extends State<TimetableCalendarView> {
     _calendarKey.currentState?.jumpToDate(_initialDisplayDate());
   }
 
-  bool isOnInitialWeek() =>
-      widget.state.startDate == _mondayOf(_initialDisplayDate());
-
   List<Appointment> _appointments(TimetableState state) {
     final timetableSettings = context
         .watch<SettingsCubit>()