feat(client): 购买模型/仓库切 pay v2 契约（render_type 多态 + 分金额 + 订单列表）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/lib/models/license.dart

@@ -1,4 +1,5 @@
 import '../core/config/app_constants.dart';
+import '../core/utils/money.dart';
 
 class LicenseInfo {
   final int id;
@@ -65,24 +66,41 @@ class LicenseInfo {
       phase == 'grace' || phase == 'readonly' || phase == 'locked';
 }
 
-/// POST /license/purchase 响应：pay 收银台跳转信息。
+/// POST /license/purchase 响应：pay v2 收银台会话信息（render_type 多态）。
 class PurchaseOrder {
-  final String payUrl;
   final String outTradeNo;
-  final String amount; // 实付金额（pay 侧权威价，如 "2999.00"）
+  final String renderType; // redirect | qr | ...
+  final Map<String, dynamic> payload;
+  final int amountMinor;
+  final String currency;
   final String subject;
 
   const PurchaseOrder({
-    required this.payUrl,
     required this.outTradeNo,
-    required this.amount,
+    required this.renderType,
+    required this.payload,
+    required this.amountMinor,
+    required this.currency,
     required this.subject,
   });
 
+  /// render_type == redirect 时的跳转链接（payload['url']）。
+  String get redirectUrl => payload['url'] as String? ?? '';
+
+  /// render_type == qr 时的二维码内容（payload['qr_content']）。
+  String get qrContent => payload['qr_content'] as String? ?? '';
+
+  /// 兼容旧字段：purchase_card.dart（Task 7 改造前）仍读 payUrl/amount。
+  String get payUrl => redirectUrl;
+  String get amount => yuanFromMinor(amountMinor);
+
   factory PurchaseOrder.fromJson(Map<String, dynamic> json) => PurchaseOrder(
-        payUrl: json['pay_url'] as String? ?? '',
         outTradeNo: json['out_trade_no'] as String? ?? '',
-        amount: json['amount'] as String? ?? '',
+        renderType: json['render_type'] as String? ?? 'redirect',
+        payload:
+            (json['payload'] as Map?)?.cast<String, dynamic>() ?? const {},
+        amountMinor: (json['amount_minor'] as num?)?.toInt() ?? 0,
+        currency: json['currency'] as String? ?? 'CNY',
         subject: json['subject'] as String? ?? '',
       );
 }
@@ -91,13 +109,17 @@ class PurchaseOrder {
 class PurchaseStatusInfo {
   final String outTradeNo;
   final String status; // pending | paid | failed
-  final String amount;
+  final int amountMinor;
+  final String currency;
+  final String amount; // Deprecated：后端 formatMinor 串回退，串失败时用 amountMinor
   final DateTime? paidAt;
   final DateTime? expiresAt; // 续期后的门店授权到期时间（仅 paid 时有值）
 
   const PurchaseStatusInfo({
     required this.outTradeNo,
     required this.status,
+    required this.amountMinor,
+    required this.currency,
     required this.amount,
     this.paidAt,
     this.expiresAt,
@@ -105,10 +127,16 @@ class PurchaseStatusInfo {
 
   bool get isPaid => status == 'paid';
 
+  /// 展示用金额：优先按 amount_minor 换算，退回旧 amount 串兜底。
+  String get displayAmount =>
+      amountMinor > 0 ? yuanFromMinor(amountMinor) : amount;
+
   factory PurchaseStatusInfo.fromJson(Map<String, dynamic> json) =>
       PurchaseStatusInfo(
         outTradeNo: json['out_trade_no'] as String? ?? '',
         status: json['status'] as String? ?? 'pending',
+        amountMinor: (json['amount_minor'] as num?)?.toInt() ?? 0,
+        currency: json['currency'] as String? ?? 'CNY',
         amount: json['amount'] as String? ?? '',
         paidAt: json['paid_at'] != null
             ? DateTime.tryParse(json['paid_at'] as String)
@@ -118,3 +146,105 @@ class PurchaseStatusInfo {
             : null,
       );
 }
+
+/// GET /license/purchases 列表项。
+class PurchaseRecord {
+  final String outTradeNo;
+  final String productBizCode;
+  final int amountMinor;
+  final String currency;
+  final String amount; // Deprecated：后端 formatMinor 串回退
+  final String status; // pending | paid | failed
+  final String payUrl;
+  final String userName;
+  final DateTime? createdAt;
+  final DateTime? paidAt;
+  final DateTime? renewedTo;
+
+  const PurchaseRecord({
+    required this.outTradeNo,
+    required this.productBizCode,
+    required this.amountMinor,
+    required this.currency,
+    required this.amount,
+    required this.status,
+    required this.payUrl,
+    required this.userName,
+    this.createdAt,
+    this.paidAt,
+    this.renewedTo,
+  });
+
+  bool get isPaid => status == 'paid';
+
+  /// 展示用金额：优先按 amount_minor 换算，退回旧 amount 串兜底。
+  String get displayAmount =>
+      amountMinor > 0 ? yuanFromMinor(amountMinor) : amount;
+
+  factory PurchaseRecord.fromJson(Map<String, dynamic> json) =>
+      PurchaseRecord(
+        outTradeNo: json['out_trade_no'] as String? ?? '',
+        productBizCode: json['product_biz_code'] as String? ?? '',
+        amountMinor: (json['amount_minor'] as num?)?.toInt() ?? 0,
+        currency: json['currency'] as String? ?? 'CNY',
+        amount: json['amount'] as String? ?? '',
+        status: json['status'] as String? ?? 'pending',
+        payUrl: json['pay_url'] as String? ?? '',
+        userName: json['user_name'] as String? ?? '',
+        createdAt: json['created_at'] != null
+            ? DateTime.tryParse(json['created_at'] as String)
+            : null,
+        paidAt: json['paid_at'] != null
+            ? DateTime.tryParse(json['paid_at'] as String)
+            : null,
+        renewedTo: json['renewed_to'] != null
+            ? DateTime.tryParse(json['renewed_to'] as String)
+            : null,
+      );
+}
+
+/// GET /license/purchases 汇总（订单管理 tab KPI）。
+class PurchaseSummary {
+  final int paidTotalMinor;
+  final int paidCount;
+  final int pendingCount;
+  final int totalCount;
+
+  const PurchaseSummary({
+    required this.paidTotalMinor,
+    required this.paidCount,
+    required this.pendingCount,
+    required this.totalCount,
+  });
+
+  factory PurchaseSummary.fromJson(Map<String, dynamic> json) =>
+      PurchaseSummary(
+        paidTotalMinor: (json['paid_total_minor'] as num?)?.toInt() ?? 0,
+        paidCount: (json['paid_count'] as num?)?.toInt() ?? 0,
+        pendingCount: (json['pending_count'] as num?)?.toInt() ?? 0,
+        totalCount: (json['total_count'] as num?)?.toInt() ?? 0,
+      );
+}
+
+/// GET /license/purchases 响应整体。
+class PurchaseListResult {
+  final List<PurchaseRecord> items;
+  final int total;
+  final PurchaseSummary summary;
+
+  const PurchaseListResult({
+    required this.items,
+    required this.total,
+    required this.summary,
+  });
+
+  factory PurchaseListResult.fromJson(Map<String, dynamic> json) =>
+      PurchaseListResult(
+        items: (json['items'] as List<dynamic>? ?? const [])
+            .map((e) => PurchaseRecord.fromJson(e as Map<String, dynamic>))
+            .toList(),
+        total: (json['total'] as num?)?.toInt() ?? 0,
+        summary: PurchaseSummary.fromJson(
+            (json['summary'] as Map<String, dynamic>?) ?? const {}),
+      );
+}