refactor: replace StreamBuilder with ConsumerWidget

lib/features/journal/state/journal_card_controller.dart

@@ -0,0 +1,45 @@
+import 'dart:async';
+
+import 'package:lotti/classes/journal_entities.dart';
+import 'package:lotti/database/database.dart';
+import 'package:lotti/get_it.dart';
+import 'package:lotti/services/db_notification.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'journal_card_controller.g.dart';
+
+@riverpod
+class JournalCardController extends _$JournalCardController {
+  JournalCardController() {
+    listen();
+  }
+
+  late final String entryId;
+  StreamSubscription<({DatabaseType type, String id})>? _updateSubscription;
+  final JournalDb _journalDb = getIt<JournalDb>();
+  final UpdateNotifications _updateNotifications = getIt<UpdateNotifications>();
+
+  void listen() {
+    _updateSubscription =
+        _updateNotifications.updateStream.listen((event) async {
+      if (event.id == entryId) {
+        final latest = await _fetch();
+        if (latest != state.value) {
+          state = AsyncData(latest);
+        }
+      }
+    });
+  }
+
+  @override
+  Future<JournalEntity?> build({required String id}) async {
+    entryId = id;
+    ref.onDispose(() => _updateSubscription?.cancel());
+    final entry = await _fetch();
+    return entry;
+  }
+
+  Future<JournalEntity?> _fetch() async {
+    return _journalDb.journalEntityById(entryId);
+  }
+}