feat: add payment card grouping and analysis

lib/models/payment_card_model.dart

@@ -0,0 +1,33 @@
+import 'package:hive/hive.dart';
+
+part 'payment_card_model.g.dart';
+
+@HiveType(typeId: 2)
+class PaymentCardModel extends HiveObject {
+  @HiveField(0)
+  String id;
+
+  @HiveField(1)
+  String issuerName;
+
+  @HiveField(2)
+  String last4;
+
+  @HiveField(3)
+  String colorHex;
+
+  @HiveField(4)
+  String iconName;
+
+  @HiveField(5)
+  bool isDefault;
+
+  PaymentCardModel({
+    required this.id,
+    required this.issuerName,
+    required this.last4,
+    required this.colorHex,
+    required this.iconName,
+    this.isDefault = false,
+  });
+}

lib/models/payment_card_model.g.dart

@@ -0,0 +1,56 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'payment_card_model.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class PaymentCardModelAdapter extends TypeAdapter<PaymentCardModel> {
+  @override
+  final int typeId = 2;
+
+  @override
+  PaymentCardModel read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return PaymentCardModel(
+      id: fields[0] as String,
+      issuerName: fields[1] as String,
+      last4: fields[2] as String,
+      colorHex: fields[3] as String,
+      iconName: fields[4] as String,
+      isDefault: fields[5] as bool,
+    );
+  }
+
+  @override
+  void write(BinaryWriter writer, PaymentCardModel obj) {
+    writer
+      ..writeByte(6)
+      ..writeByte(0)
+      ..write(obj.id)
+      ..writeByte(1)
+      ..write(obj.issuerName)
+      ..writeByte(2)
+      ..write(obj.last4)
+      ..writeByte(3)
+      ..write(obj.colorHex)
+      ..writeByte(4)
+      ..write(obj.iconName)
+      ..writeByte(5)
+      ..write(obj.isDefault);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is PaymentCardModelAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

lib/models/payment_card_suggestion.dart

@@ -0,0 +1,14 @@
+/// SMS 스캔 등에서 추출한 결제수단 정보 제안
+class PaymentCardSuggestion {
+  final String issuerName;
+  final String? last4;
+  final String? source; // 예: SMS, OCR 등
+
+  const PaymentCardSuggestion({
+    required this.issuerName,
+    this.last4,
+    this.source,
+  });
+
+  bool get hasLast4 => last4 != null && last4!.length == 4;
+}

lib/models/subscription.dart

@@ -1,3 +1,5 @@
+import 'payment_card_suggestion.dart';
+
 class Subscription {
   final String id;
   final String serviceName;
@@ -10,6 +12,8 @@ class Subscription {
   final DateTime? lastPaymentDate;
   final String? websiteUrl;
   final String currency;
+  final String? paymentCardId;
+  final PaymentCardSuggestion? paymentCardSuggestion;
 
   Subscription({
     required this.id,
@@ -23,6 +27,8 @@ class Subscription {
     this.lastPaymentDate,
     this.websiteUrl,
     this.currency = 'KRW',
+    this.paymentCardId,
+    this.paymentCardSuggestion,
   });
 
   Map<String, dynamic> toMap() {
@@ -38,6 +44,10 @@ class Subscription {
       'lastPaymentDate': lastPaymentDate?.toIso8601String(),
       'websiteUrl': websiteUrl,
       'currency': currency,
+      'paymentCardId': paymentCardId,
+      'paymentCardSuggestionIssuer': paymentCardSuggestion?.issuerName,
+      'paymentCardSuggestionLast4': paymentCardSuggestion?.last4,
+      'paymentCardSuggestionSource': paymentCardSuggestion?.source,
     };
   }
 
@@ -56,6 +66,14 @@ class Subscription {
           : null,
       websiteUrl: map['websiteUrl'] as String?,
       currency: map['currency'] as String? ?? 'KRW',
+      paymentCardId: map['paymentCardId'] as String?,
+      paymentCardSuggestion: map['paymentCardSuggestionIssuer'] != null
+          ? PaymentCardSuggestion(
+              issuerName: map['paymentCardSuggestionIssuer'] as String,
+              last4: map['paymentCardSuggestionLast4'] as String?,
+              source: map['paymentCardSuggestionSource'] as String?,
+            )
+          : null,
     );
   }
 

lib/models/subscription_model.dart

@@ -49,6 +49,9 @@ class SubscriptionModel extends HiveObject {
   @HiveField(14)
   double? eventPrice; // 이벤트 기간 중 가격
 
+  @HiveField(15)
+  String? paymentCardId; // 연결된 결제수단의 ID
+
   SubscriptionModel({
     required this.id,
     required this.serviceName,
@@ -65,6 +68,7 @@ class SubscriptionModel extends HiveObject {
     this.eventStartDate,
     this.eventEndDate,
     this.eventPrice,
+    this.paymentCardId,
   });
 
   // 주기적 결제 여부 확인

lib/models/subscription_model.g.dart

@@ -32,13 +32,14 @@ class SubscriptionModelAdapter extends TypeAdapter<SubscriptionModel> {
       eventStartDate: fields[12] as DateTime?,
       eventEndDate: fields[13] as DateTime?,
       eventPrice: fields[14] as double?,
+      paymentCardId: fields[15] as String?,
     );
   }
 
   @override
   void write(BinaryWriter writer, SubscriptionModel obj) {
     writer
-      ..writeByte(15)
+      ..writeByte(16)
       ..writeByte(0)
       ..write(obj.id)
       ..writeByte(1)
@@ -68,7 +69,9 @@ class SubscriptionModelAdapter extends TypeAdapter<SubscriptionModel> {
       ..writeByte(13)
       ..write(obj.eventEndDate)
       ..writeByte(14)
-      ..write(obj.eventPrice);
+      ..write(obj.eventPrice)
+      ..writeByte(15)
+      ..write(obj.paymentCardId);
   }
 
   @override