added teacher-focused lesson sheet with direct class and teacher timetable links

test/state/app_modules_order_test.dart

@@ -92,4 +92,47 @@ void main() {
       );
     });
   });
+
+  group('applyTeacherDefaults', () {
+    test('hides the absence report once for teachers', () {
+      final settings = settingsWith(Modules.values);
+
+      expect(AppModule.applyTeacherDefaults(settings, isTeacher: true), isTrue);
+      expect(settings.hiddenModules, [Modules.absenceReport]);
+      expect(settings.teacherDefaultsApplied, isTrue);
+    });
+
+    test('keeps a module the teacher re-enabled afterwards', () {
+      final settings = settingsWith(Modules.values);
+      AppModule.applyTeacherDefaults(settings, isTeacher: true);
+      settings.hiddenModules.remove(Modules.absenceReport);
+
+      expect(
+        AppModule.applyTeacherDefaults(settings, isTeacher: true),
+        isFalse,
+      );
+      expect(settings.hiddenModules, isEmpty);
+    });
+
+    test('leaves non-teachers untouched', () {
+      final settings = settingsWith(Modules.values);
+
+      expect(
+        AppModule.applyTeacherDefaults(settings, isTeacher: false),
+        isFalse,
+      );
+      expect(settings.hiddenModules, isEmpty);
+      expect(settings.teacherDefaultsApplied, isFalse);
+    });
+
+    test('does not duplicate an already hidden module', () {
+      final settings = ModulesSettings(
+        moduleOrder: Modules.values,
+        hiddenModules: [Modules.absenceReport, Modules.files],
+      );
+      AppModule.applyTeacherDefaults(settings, isTeacher: true);
+
+      expect(settings.hiddenModules, [Modules.absenceReport, Modules.files]);
+    });
+  });
 }