app working with sandbox

lib/utils/connect_bank.dart

@@ -0,0 +1,59 @@
+/// Shared UI helpers for bank connect actions.
+library;
+
+import 'package:flutter/material.dart';
+
+import '../providers/bank_provider.dart';
+import '../screens/bank_auth_screen.dart';
+
+Future<void> runConnectBank(BuildContext context, BankController bank) async {
+  final start = await bank.beginConnect();
+  if (!context.mounted) return;
+
+  if (start == null) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(content: Text(bank.error ?? 'Could not start bank connect')),
+    );
+    return;
+  }
+
+  final result = await Navigator.of(context).push<BankAuthResult>(
+    MaterialPageRoute(
+      builder: (_) => BankAuthScreen(
+        authUrl: start.authUrl,
+        pendingState: start.state,
+      ),
+    ),
+  );
+
+  if (!context.mounted) return;
+  if (result == null) return;
+
+  if (result.error != null && result.error!.isNotEmpty) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(content: Text('Bank auth failed: ${result.error}')),
+    );
+    return;
+  }
+
+  if (!result.hasCode) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(content: Text('Bank redirect missing code')),
+    );
+    return;
+  }
+
+  final linked = await bank.completeWithCode(
+    code: result.code!,
+    state: result.state,
+  );
+  if (!context.mounted) return;
+
+  ScaffoldMessenger.of(context).showSnackBar(
+    SnackBar(
+      content: Text(
+        linked ? 'Bank linked' : (bank.error ?? 'Could not complete connect'),
+      ),
+    ),
+  );
+}

lib/utils/constants.dart

@@ -2,7 +2,7 @@
 library;
 
 /// Human-readable name shown in the splash screen, app bars, and About tile.
-const String kAppName = 'MyApp';
+const String kAppName = 'IngTrak';
 
 /// Package / Android application id.
 const String kPackageName = 'com.example.myapp';
@@ -10,6 +10,32 @@ const String kPackageName = 'com.example.myapp';
 /// How long the splash screen stays visible before navigating to the shell.
 const Duration kSplashDuration = Duration(seconds: 2);
 
+/// Base URL for the personal ingtrak FastAPI backend.
+///
+/// Override at build/run time:
+/// `flutter run --dart-define=API_BASE_URL=http://192.168.1.114:8000`
+///
+/// Defaults:
+/// - Android emulator → `http://10.0.2.2:8000` (host loopback)
+/// - iOS Simulator → `http://127.0.0.1:8000`
+/// - Physical device → Mac LAN IP, e.g. `http://192.168.1.114:8000`
+const String kApiBaseUrl = String.fromEnvironment(
+  'API_BASE_URL',
+  defaultValue: 'http://10.0.2.2:8000',
+);
+
+/// Enable Banking only accepts http(s) redirect URLs (not custom schemes).
+/// Keep this exact value in the Control Panel and backend `REDIRECT_URI`.
+/// The app opens auth in a WebView and intercepts this callback to read `code`.
+const String kEnableBankingRedirectUri =
+    'http://localhost:8000/api/connect/callback';
+
+/// Optional app-scheme bounce used after the http callback (not registered
+/// with Enable Banking).
+const String kBankRedirectScheme = 'ingtrak';
+const String kBankRedirectHost = 'connected';
+const String kBankRedirectUri = '$kBankRedirectScheme://$kBankRedirectHost';
+
 /// SharedPreferences keys.
 abstract final class StorageKeys {
   static const themeMode = 'theme_mode';

lib/utils/helpers.dart

@@ -57,3 +57,31 @@ String labelForThemeMode(ThemeMode mode) {
     ThemeMode.system => 'System',
   };
 }
+
+/// Formats a money amount with currency code, e.g. `1 234,56 EUR`.
+String formatMoney(double amount, String currency) {
+  final sign = amount < 0 ? '-' : '';
+  final abs = amount.abs();
+  final fixed = abs.toStringAsFixed(2);
+  final parts = fixed.split('.');
+  final whole = parts[0];
+  final fraction = parts.length > 1 ? parts[1] : '00';
+
+  final buffer = StringBuffer();
+  for (var i = 0; i < whole.length; i++) {
+    final fromEnd = whole.length - i;
+    buffer.write(whole[i]);
+    if (fromEnd > 1 && fromEnd % 3 == 1) {
+      buffer.write('\u00a0');
+    }
+  }
+  return '$sign${buffer.toString()},$fraction $currency';
+}
+
+/// Formats an ISO date string (`yyyy-MM-dd` or full ISO) for list rows.
+String formatIsoDate(String raw) {
+  if (raw.isEmpty) return '';
+  final parsed = DateTime.tryParse(raw);
+  if (parsed == null) return raw;
+  return formatDate(parsed);
+}