added guardian login with views for their assigned childs

lib/widget_data/widget_sync.dart

@@ -4,6 +4,7 @@ import 'dart:developer';
 
 import 'package:home_widget/home_widget.dart';
 
+import '../state/app/modules/timetable/subject/timetable_subject.dart';
 import 'widget_data.dart';
 
 /// Bridge to the native widget host. All keys/names live here so the Kotlin
@@ -31,15 +32,50 @@ class WidgetSync {
   static const String connectDoubleLessonsKey =
       'widget_setting_connect_double_lessons_v1';
   static const String themeModeKey = 'widget_setting_theme_mode_v1';
-  // Mirrored from CapabilitiesCubit so the background isolate can render
-  // teacher plans (class instead of teacher name) without bloc storage.
-  static const String isTeacherKey = 'widget_setting_is_teacher_v1';
+  // Mirrors the resolved TimetablePolicy flag so the background isolate
+  // renders tiles like the app does, without bloc storage. The key predates
+  // the policy (it used to mirror "is teacher") and keeps its name so
+  // existing installs stay consistent.
+  static const String showClassInsteadOfTeacherKey =
+      'widget_setting_is_teacher_v1';
   // Mirrored so the background isolate hits the same Marianum-Connect base
   // URL the in-app settings cubit currently has selected.
-  static const String marianumConnectBaseUrlKey = 'widget_setting_mc_base_url_v1';
+  static const String marianumConnectBaseUrlKey =
+      'widget_setting_mc_base_url_v1';
+
+  // Which plan the widget shows ('own' or 'child:<id>'), so the background
+  // isolate fetches the same subject as the app.
+  static const String subjectKey = 'widget_setting_subject_v1';
 
   static bool _initialised = false;
 
+  /// Only the primary subjects can back the widget; foreign plans cannot.
+  static String? encodeSubject(TimetableSubject subject) => switch (subject) {
+    OwnTimetable() => 'own',
+    ChildTimetable(:final childId) => 'child:$childId',
+    ElementTimetable() || NoTimetable() => null,
+  };
+
+  /// A missing value means an install from before guardian accounts, which
+  /// always showed the own plan.
+  static TimetableSubject? decodeSubject(String? value) {
+    if (value == null || value == 'own') return const OwnTimetable();
+    if (value.startsWith('child:') && value.length > 'child:'.length) {
+      return ChildTimetable(value.substring('child:'.length));
+    }
+    return null;
+  }
+
+  static Future<void> setSubject(TimetableSubject subject) async {
+    await ensureInitialized();
+    await HomeWidget.saveWidgetData<String>(subjectKey, encodeSubject(subject));
+  }
+
+  static Future<TimetableSubject?> getSubject() async {
+    await ensureInitialized();
+    return decodeSubject(await HomeWidget.getWidgetData<String>(subjectKey));
+  }
+
   static Future<void> ensureInitialized() async {
     if (_initialised) return;
     await HomeWidget.setAppGroupId(iosAppGroupId);
@@ -72,10 +108,11 @@ class WidgetSync {
   static Future<bool> getConnectDoubleLessons() =>
       _getBool(connectDoubleLessonsKey, defaultValue: true);
 
-  static Future<void> setIsTeacher(bool value) => _setBool(isTeacherKey, value);
+  static Future<void> setShowClassInsteadOfTeacher(bool value) =>
+      _setBool(showClassInsteadOfTeacherKey, value);
 
-  static Future<bool> getIsTeacher() =>
-      _getBool(isTeacherKey, defaultValue: false);
+  static Future<bool> getShowClassInsteadOfTeacher() =>
+      _getBool(showClassInsteadOfTeacherKey, defaultValue: false);
 
   static Future<void> _setBool(String key, bool value) async {
     await ensureInitialized();
@@ -114,6 +151,7 @@ class WidgetSync {
     await HomeWidget.saveWidgetData<String>(weekDataKey, null);
     await HomeWidget.saveWidgetData<String>(fetchedAtKey, null);
     await HomeWidget.saveWidgetData<bool>(loggedInKey, false);
+    await HomeWidget.saveWidgetData<String>(subjectKey, null);
   }
 
   static Future<void> triggerUpdate() async {