migrated timetable integration from WebUntis to the MarianumConnect API, implementing a Dio-based client with bearer token authentication, background session validation, and auto-refresh logic.

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

@@ -38,7 +38,10 @@ class _OutsideHoursStrip extends StatelessWidget {
         (maxChipsPerDay > 1 ? (maxChipsPerDay - 1) * kOutsideChipSpacing : 0);
 
     return Container(
-      color: theme.colorScheme.surfaceContainerLowest,
+      // Scaffold-Background, damit die Ganztagestermine-Leiste optisch nahtlos
+      // an Header und Stundenplan-Hintergrund anschließt; surfaceContainerLowest
+      // ist in M3-Light reinweiß und sticht gegen die getönte Seed-Surface ab.
+      color: theme.scaffoldBackgroundColor,
       padding: const EdgeInsets.symmetric(
         vertical: kOutsideStripVerticalPadding,
       ),