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/main.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/material.dart';
+import 'package:get_it/get_it.dart';
+import 'app.dart';
+import 'core/network/api_client.dart';
+
+final getIt = GetIt.instance;
+
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+  _setupDI();
+  runApp(const FocusFlowApp());
+}
+
+void _setupDI() {
+  getIt.registerLazySingleton<ApiClient>(() => ApiClient());
+}