feat: improve patient flow and pricing workflow

lib/models/finance_entry.dart

@@ -21,6 +21,7 @@ class FinanceEntry {
     required this.amount,
     required this.currency,
     required this.status,
+    this.counterpartyTenantId,
     this.paidAt,
     this.counterpartyName,
     this.patientCode,
@@ -34,6 +35,7 @@ class FinanceEntry {
   final double amount;
   final String currency;
   final FinanceStatus status;
+  final String? counterpartyTenantId;
   final String? paidAt;
   final String? counterpartyName;
   final String? patientCode;
@@ -53,6 +55,7 @@ class FinanceEntry {
       currency: j['currency'] as String? ?? 'TRY',
       status: FinanceStatus.values.firstWhere((e) => e.value == j['status'],
           orElse: () => FinanceStatus.pending),
+      counterpartyTenantId: _str(j['counterparty_tenant_id']),
       paidAt: _str(j['paid_at']),
       counterpartyName: _str(j['counterparty_name']),
       patientCode: jobExp?['patient_code'] as String?,
@@ -60,3 +63,23 @@ class FinanceEntry {
     );
   }
 }
+
+class CounterpartyFinanceSummary {
+  const CounterpartyFinanceSummary({
+    required this.counterpartyName,
+    required this.currency,
+    required this.pendingAmount,
+    required this.paidAmount,
+    required this.entryCount,
+    this.counterpartyTenantId,
+  });
+
+  final String counterpartyName;
+  final String currency;
+  final double pendingAmount;
+  final double paidAmount;
+  final int entryCount;
+  final String? counterpartyTenantId;
+
+  double get totalAmount => pendingAmount + paidAmount;
+}