feat: polish phase 7 forms and schedules

test/group_form_logic_test.dart

@@ -0,0 +1,37 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ignis_app/features/groups/group_form_logic.dart';
+import 'package:ignis_app/models/ignis_group.dart';
+
+void main() {
+  test('slugify transliterates russian names into stable ids', () {
+    expect(slugifyGroupId('Спальня родителей'), 'spalnya-roditeley');
+    expect(slugifyGroupId('  Kitchen + Hall  '), 'kitchen-hall');
+  });
+
+  test('group id validation rejects duplicates and invalid chars', () {
+    const existing = [IgnisGroup(id: 'bedroom', name: 'Спальня')];
+
+    expect(validateGroupId('', existing), 'Укажите ID группы');
+    expect(
+      validateGroupId('спальня', existing),
+      'Только латиница, цифры, "-" и "_"',
+    );
+    expect(
+      validateGroupId('bedroom', existing),
+      'Группа с таким ID уже существует',
+    );
+    expect(validateGroupId('hall_way', existing), isNull);
+  });
+
+  test('membership conflicts are detected by device ids', () {
+    const groups = [
+      IgnisGroup(id: 'bedroom', name: 'Спальня', macs: ['AA:BB', 'CC:DD']),
+      IgnisGroup(id: 'kitchen', name: 'Кухня', macs: ['EE:FF']),
+    ];
+
+    final conflicts = findGroupMembershipConflicts({'EE:FF', '11:22'}, groups);
+
+    expect(conflicts, hasLength(1));
+    expect(conflicts.single.id, 'kitchen');
+  });
+}