feat: 接入起卦后端流程并完善积分扣减链路

apps/test/features/divination/divination_params_test.dart

@@ -2,8 +2,15 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:meeyao_qianwen/features/divination/data/models/divination_params.dart';
 
 void main() {
-  test('mock data contains valid defaults', () {
-    final params = DivinationMockData.initial();
+  test('params contains valid fields', () {
+    final params = DivinationParams(
+      method: DivinationMethod.manual,
+      questionType: QuestionType.career,
+      question: '测试问题',
+      divinationTime: DateTime(2026, 4, 3, 10, 30),
+      coinBalance: 8,
+      userId: 'u_test',
+    );
 
     expect(params.method, DivinationMethod.manual);
     expect(params.questionType, QuestionType.career);
@@ -30,7 +37,14 @@ void main() {
   });
 
   test('toBinary and toChangedBinary mappings are correct', () {
-    final params = DivinationMockData.initial();
+    final params = DivinationParams(
+      method: DivinationMethod.manual,
+      questionType: QuestionType.career,
+      question: '测试问题',
+      divinationTime: DateTime(2026, 4, 3, 10, 30),
+      coinBalance: 8,
+      userId: 'u_test',
+    );
     final states = <YaoType>[
       YaoType.oldYin,
       YaoType.youngYang,