ok for now

lib/screens/main_shell.dart

@@ -1,13 +1,11 @@
-/// Host scaffold that owns the bottom navigation bar and its tabs.
+/// Host scaffold: Home + Overview. Settings lives in the app-bar gear.
 library;
 
 import 'package:flutter/material.dart';
 
-import 'balance_screen.dart';
-import 'settings_screen.dart';
-import 'transactions_screen.dart';
+import 'home_screen.dart';
+import 'overview_screen.dart';
 
-/// Switches between Balance, Transactions, and Settings without stacking routes.
 class MainShell extends StatefulWidget {
   const MainShell({super.key});
 
@@ -19,9 +17,8 @@ class _MainShellState extends State<MainShell> {
   int _index = 0;
 
   static const _pages = [
-    BalanceScreen(),
-    TransactionsScreen(),
-    SettingsScreen(),
+    HomeScreen(),
+    OverviewScreen(),
   ];
 
   @override
@@ -36,19 +33,14 @@ class _MainShellState extends State<MainShell> {
         onDestinationSelected: (index) => setState(() => _index = index),
         destinations: const [
           NavigationDestination(
-            icon: Icon(Icons.account_balance_wallet_outlined),
-            selectedIcon: Icon(Icons.account_balance_wallet),
-            label: 'Balance',
+            icon: Icon(Icons.home_outlined),
+            selectedIcon: Icon(Icons.home),
+            label: 'Home',
           ),
           NavigationDestination(
-            icon: Icon(Icons.receipt_long_outlined),
-            selectedIcon: Icon(Icons.receipt_long),
-            label: 'Transactions',
-          ),
-          NavigationDestination(
-            icon: Icon(Icons.settings_outlined),
-            selectedIcon: Icon(Icons.settings),
-            label: 'Settings',
+            icon: Icon(Icons.insights_outlined),
+            selectedIcon: Icon(Icons.insights),
+            label: 'Overview',
           ),
         ],
       ),