feat(mobile-app): KYC成功后自动跳转合同签署页面

从认种流程进入KYC时传递orderNo参数:
- 认种页面 -> KYC Entry -> KYC ID 传递 orderNo
- KYC成功后如果有orderNo则跳转合同签署
- 直接进入KYC（无orderNo）则正常返回

修改文件:
- app_router.dart: KYC路由支持orderNo参数
- kyc_entry_page.dart: 接收并传递orderNo
- kyc_id_page.dart: 成功后判断是否跳转合同签署
- planting_location_page.dart: 跳转KYC时传递orderNo

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mobile-app/lib/features/kyc/presentation/pages/kyc_entry_page.dart

@@ -25,7 +25,10 @@ final kycStatusProvider = FutureProvider.autoDispose<KycStatusResponse>((ref) as
 /// 层级2: 实人认证 (人脸活体检测)
 /// 层级3: KYC (证件照上传验证)
 class KycEntryPage extends ConsumerWidget {
-  const KycEntryPage({super.key});
+  /// 从认种流程跳转时带的订单号，KYC成功后需要跳转到合同签署
+  final String? orderNo;
+
+  const KycEntryPage({super.key, this.orderNo});
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
@@ -257,7 +260,8 @@ class KycEntryPage extends ConsumerWidget {
             // 手机号未验证，跳转到验证手机号页面
             _showPhoneVerificationRequiredDialog(context);
           } else {
-            context.push(RoutePaths.kycId);
+            // 传递 orderNo 到 KycIdPage
+            context.push(RoutePaths.kycId, extra: orderNo);
           }
         }
       },

frontend/mobile-app/lib/features/kyc/presentation/pages/kyc_id_page.dart

@@ -2,14 +2,15 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:go_router/go_router.dart';
-import 'kyc_entry_page.dart';
-import '../../../home/presentation/pages/home_shell_page.dart';
-import '../../../../core/di/injection_container.dart';
+import 'kyc_entry_page.dart' show kycStatusProvider, kycServiceProvider;
 import '../../../../routes/route_paths.dart';
 
 /// KYC 层级1: 实名认证页面 (三要素验证: 姓名+身份证号+手机号)
 class KycIdPage extends ConsumerStatefulWidget {
-  const KycIdPage({super.key});
+  /// 从认种流程跳转时带的订单号，KYC成功后需要跳转到合同签署
+  final String? orderNo;
+
+  const KycIdPage({super.key, this.orderNo});
 
   @override
   ConsumerState<KycIdPage> createState() => _KycIdPageState();
@@ -85,9 +86,16 @@ class _KycIdPageState extends ConsumerState<KycIdPage> {
             behavior: SnackBarBehavior.floating,
           ),
         );
-        // 刷新状态并返回
+        // 刷新状态
         ref.invalidate(kycStatusProvider);
-        context.pop(true);
+
+        // 如果有 orderNo，说明是从认种流程来的，跳转到合同签署页面
+        if (widget.orderNo != null) {
+          context.go('${RoutePaths.contractSigning}/${widget.orderNo}');
+        } else {
+          // 否则直接返回
+          context.pop(true);
+        }
       } else {
         setState(() {
           _errorMessage = result.errorMessage ?? '验证失败，请检查信息是否正确';

frontend/mobile-app/lib/features/planting/presentation/pages/planting_location_page.dart

@@ -287,7 +287,8 @@ class _PlantingLocationPageState extends ConsumerState<PlantingLocationPage> {
 
             final goToKyc = await KycRequiredDialog.show(context: context);
             if (goToKyc == true && mounted) {
-              context.push(RoutePaths.kycEntry);
+              // 传递 orderNo，KYC 成功后自动跳转到合同签署
+              context.push(RoutePaths.kycEntry, extra: widget.orderNo);
               return;
             }
           } else if (mounted) {

frontend/mobile-app/lib/routes/app_router.dart

@@ -368,7 +368,11 @@ final appRouterProvider = Provider<GoRouter>((ref) {
       GoRoute(
         path: RoutePaths.kycEntry,
         name: RouteNames.kycEntry,
-        builder: (context, state) => const KycEntryPage(),
+        builder: (context, state) {
+          // 从认种流程来时会带 orderNo
+          final orderNo = state.extra as String?;
+          return KycEntryPage(orderNo: orderNo);
+        },
       ),
 
       // KYC Phone Verification Page (手机号验证)
@@ -382,7 +386,11 @@ final appRouterProvider = Provider<GoRouter>((ref) {
       GoRoute(
         path: RoutePaths.kycId,
         name: RouteNames.kycId,
-        builder: (context, state) => const KycIdPage(),
+        builder: (context, state) {
+          // 从认种流程来时会带 orderNo
+          final orderNo = state.extra as String?;
+          return KycIdPage(orderNo: orderNo);
+        },
       ),
 
       // KYC Face Verification Page (层级2: 实人认证 - 人脸活体)