admin user able to create test txs

lib/models/bank.dart

@@ -88,6 +88,7 @@ class BankTransaction {
     required this.amount,
     required this.currency,
     required this.pending,
+    this.isManual = false,
   });
 
   final String date;
@@ -96,6 +97,9 @@ class BankTransaction {
   final String currency;
   final bool pending;
 
+  /// Admin-created test row (editable / deletable); not from bank feed or CSV.
+  final bool isManual;
+
   /// Stable local key used for per-occurrence annotations.
   String get id => '$date|$currency|$amount|$description';
 
@@ -109,6 +113,33 @@ class BankTransaction {
   /// Exact match for copying notes (same description + amount + currency).
   String get exactKey => '$descriptionKey|$amount|$currency';
 
+  BankTransaction copyWith({
+    String? date,
+    String? description,
+    double? amount,
+    String? currency,
+    bool? pending,
+    bool? isManual,
+  }) {
+    return BankTransaction(
+      date: date ?? this.date,
+      description: description ?? this.description,
+      amount: amount ?? this.amount,
+      currency: currency ?? this.currency,
+      pending: pending ?? this.pending,
+      isManual: isManual ?? this.isManual,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'date': date,
+        'description': description,
+        'amount': amount,
+        'currency': currency,
+        'pending': pending,
+        if (isManual) 'isManual': true,
+      };
+
   factory BankTransaction.fromJson(Map<String, dynamic> json) {
     final rawAmount = json['amount'];
     final amount = switch (rawAmount) {
@@ -122,6 +153,9 @@ class BankTransaction {
       amount: amount,
       currency: json['currency'] as String? ?? 'EUR',
       pending: json['pending'] as bool? ?? false,
+      isManual: json['isManual'] as bool? ??
+          json['is_manual'] as bool? ??
+          false,
     );
   }
 }