Add pricing entry flow and platform admin foundations

lib/models/finance_entry.dart

@@ -5,11 +5,23 @@ extension FinanceTypeX on FinanceType {
   String get label => this == FinanceType.receivable ? 'Alacak' : 'Borç';
 }
 
-enum FinanceStatus { pending, paid }
+enum FinanceStatus { pending, reported, paid }
 
 extension FinanceStatusX on FinanceStatus {
   String get value => name;
-  String get label => this == FinanceStatus.pending ? 'Bekliyor' : 'Ödendi';
+  String get label {
+    switch (this) {
+      case FinanceStatus.pending:
+        return 'Bekliyor';
+      case FinanceStatus.reported:
+        return 'Onay Bekliyor';
+      case FinanceStatus.paid:
+        return 'Onaylandı';
+    }
+  }
+
+  bool get isOpen =>
+      this == FinanceStatus.pending || this == FinanceStatus.reported;
 }
 
 class FinanceEntry {
@@ -44,7 +56,11 @@ class FinanceEntry {
   factory FinanceEntry.fromJson(Map<String, dynamic> j) {
     final expand = j['expand'] as Map<String, dynamic>?;
     final jobExp = expand?['job_id'] as Map<String, dynamic>?;
-    String? _str(dynamic v) { final s = v as String?; return (s == null || s.isEmpty) ? null : s; }
+    String? parseOptionalString(dynamic v) {
+      final s = v as String?;
+      return (s == null || s.isEmpty) ? null : s;
+    }
+
     return FinanceEntry(
       id: j['id'] as String,
       tenantId: j['tenant_id'] as String,
@@ -55,9 +71,9 @@ 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']),
+      counterpartyTenantId: parseOptionalString(j['counterparty_tenant_id']),
+      paidAt: parseOptionalString(j['paid_at']),
+      counterpartyName: parseOptionalString(j['counterparty_name']),
       patientCode: jobExp?['patient_code'] as String?,
       dateCreated: j['created'] as String?,
     );