Feat: Zeigt einen Button zum Konto-Erstellen an, falls kein Konto existiert

lib/Pages/Misc/account_select.dart

@@ -67,7 +67,17 @@ class _AccountSelectState extends State<AccountSelect> {
         ),
       );
     } else if (_selected == null && _accounts.isEmpty) {
-      return const Text('');
+      return TextButton(
+        onPressed: _accountController.newAccountHandler,
+        child: const Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Icon(Icons.account_balance_wallet),
+            SizedBox(width: 10),
+            Text('Konto hinzufügen'),
+          ],
+        ),
+      );
     } else {
       return const CircularProgressIndicator();
     }