Initial scaffold: FocusFlow ADHD Task Manager Flutter app

BLoC/Cubit state management, ADHD-friendly theme (calming teal, no red),
GetIt DI, GoRouter navigation. Screens: task dashboard, focus mode,
task create/detail, streaks, time perception, settings, onboarding, auth.
Custom widgets: TaskCard, RewardPopup, StreakRing, GentleNudgeCard.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/features/tasks/presentation/bloc/next_task_cubit.dart

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+import 'package:equatable/equatable.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:focusflow_shared/focusflow_shared.dart';
+
+import '../../../../core/network/api_client.dart';
+import '../../../../main.dart';
+
+// ── States ─────────────────────────────────────────────────────────
+
+sealed class NextTaskState extends Equatable {
+  const NextTaskState();
+  @override
+  List<Object?> get props => [];
+}
+
+class NextTaskLoading extends NextTaskState {}
+
+class NextTaskLoaded extends NextTaskState {
+  final Task task;
+  const NextTaskLoaded(this.task);
+  @override
+  List<Object?> get props => [task];
+}
+
+class NextTaskEmpty extends NextTaskState {}
+
+class NextTaskError extends NextTaskState {
+  final String message;
+  const NextTaskError(this.message);
+  @override
+  List<Object?> get props => [message];
+}
+
+// ── Cubit ──────────────────────────────────────────────────────────
+
+/// Simple cubit for focus mode: "just do the next thing."
+///
+/// Loads the single highest-priority task from the API.
+class NextTaskCubit extends Cubit<NextTaskState> {
+  final ApiClient _api = getIt<ApiClient>();
+
+  NextTaskCubit() : super(NextTaskLoading());
+
+  /// Fetch the next recommended task.
+  Future<void> loadNext() async {
+    emit(NextTaskLoading());
+    try {
+      final response = await _api.fetchNextTask();
+      final data = response.data;
+      if (data != null && data['status'] == 'success' && data['data'] != null) {
+        final task = Task.fromJson(data['data'] as Map<String, dynamic>);
+        emit(NextTaskLoaded(task));
+      } else {
+        emit(NextTaskEmpty());
+      }
+    } catch (_) {
+      emit(const NextTaskError('Could not load your next task.'));
+    }
+  }
+
+  /// Mark the current task as done, then load the next one.
+  Future<void> complete() async {
+    final current = state;
+    if (current is! NextTaskLoaded) return;
+    try {
+      await _api.completeTask(current.task.id);
+    } catch (_) {
+      // Best-effort — still load next.
+    }
+    await loadNext();
+  }
+
+  /// Skip the current task, then load the next one.
+  Future<void> skip() async {
+    final current = state;
+    if (current is! NextTaskLoaded) return;
+    try {
+      await _api.skipTask(current.task.id);
+    } catch (_) {
+      // Best-effort.
+    }
+    await loadNext();
+  }
+}