ing connected, makign some features

lib/models/bank.dart

@@ -1,6 +1,8 @@
 /// Domain models for the personal ingtrak bank-data API.
 library;
 
+import 'transaction_meta.dart' show merchantKeyFromDescription;
+
 /// Result of `POST /api/connect`.
 class ConnectStart {
   const ConnectStart({required this.authUrl, required this.state});
@@ -101,6 +103,9 @@ class BankTransaction {
   String get descriptionKey =>
       description.trim().toLowerCase().replaceAll(RegExp(r'\s+'), ' ');
 
+  /// Fuzzy merchant key — strips dates / terminal / SEPA noise.
+  String get merchantKey => merchantKeyFromDescription(description);
+
   /// Exact match for copying notes (same description + amount + currency).
   String get exactKey => '$descriptionKey|$amount|$currency';