feat: 新增诊断报告全流程功能，适配登录后报告跳转逻辑

实现了入门测/出门测报告的完整链路：
1. 新增UserInfo模型的出门测报告标记字段与相关接口
2. 新增全局报告路由拦截器，自动在登录后/应用回前台时检查报告状态
3. 新增报告相关API、页面与路由配置，包含欢迎页、H5壳子、AI计算页
4. 适配登录成功后的报告跳转逻辑，更新用户状态管理方法

lib/core/api/report/api.dart

@@ -0,0 +1,46 @@
+import 'package:new_learn/core/api/report/model.dart';
+import 'package:new_learn/core/network/dio_client.dart';
+
+/// ============================================================
+/// 【report 模块接口】入门测/出门测诊断报告 —— 对标 Vue3 端 api/report/index.ts
+///
+///  注意：这个模块是"诊断报告包"那条链路的接口（studentInfo / reportComputation 页用），
+///  与 core/api/my_report（历史报告列表）不是同一个业务模块。
+///
+///   getCurrentReport()        → 入门测报告（placementTest）
+///   getCurrentAfterReport()   → 出门测报告（exitTest）
+///   getCurrentReportKnow()    → 当前用户未掌握知识点（reportComputation AI 动画页用）
+/// ============================================================
+class ReportApi {
+  ReportApi._();
+
+  static final ReportApi instance = ReportApi._();
+
+  /// 获取当前用户入门测试报告 → GET /api/v1/UserReport/GetCurrentReport
+  Future<UserReportType> getCurrentReport() async {
+    final data = await DioClient.instance.get(
+      '/api/v1/UserReport/GetCurrentReport',
+    );
+    return UserReportType.fromJson(data as Map<String, dynamic>);
+  }
+
+  /// 获取当前用户出门测试报告 → GET /api/v1/UserReport/GetCurrentAfterReport
+  Future<UserReportType> getCurrentAfterReport() async {
+    final data = await DioClient.instance.get(
+      '/api/v1/UserReport/GetCurrentAfterReport',
+    );
+    return UserReportType.fromJson(data as Map<String, dynamic>);
+  }
+
+  /// 获取当前用户未掌握的知识点 → GET /api/v1/UserReport/GetCurrentReportKnow
+  Future<List<UserReportKnowType>> getCurrentReportKnow() async {
+    final data = await DioClient.instance.get(
+      '/api/v1/UserReport/GetCurrentReportKnow',
+    );
+    final list = data is List ? data : (data['data'] as List<dynamic>? ?? const []);
+    return list
+        .whereType<Map<String, dynamic>>()
+        .map(UserReportKnowType.fromJson)
+        .toList();
+  }
+}

lib/core/api/report/model.dart

@@ -0,0 +1,80 @@
+/// ============================================================
+/// 【report 模块模型】入门测/出门测报告 —— 对标 Vue3 端 api/report/type.ts
+///
+///  注意：这个模块是"诊断报告包"（报告状态流转那条链路用的），
+///  与 core/api/my_report（历史报告列表）不是同一个业务模块。
+///
+///   SubjectReportType  → 单科目报告（科目名/图标/知识点数/报告URL）
+///   UserReportType      → 当前用户诊断报告整体（用户名/能力等级/科目列表）
+///   UserReportKnowType  → 当前用户未掌握的知识点（reportComputation 页用）
+///
+/// 序列化：手动 fromJson，与项目其他模块风格一致，不依赖 build_runner。
+/// ============================================================
+library;
+
+/// 单科目报告信息
+class SubjectReportType {
+  const SubjectReportType({
+    this.subjectName = '',
+    this.url = '',
+    this.icon = '',
+    this.knowledgePoint = 0,
+  });
+
+  final String subjectName;
+  final String url;
+  final String icon;
+  final int knowledgePoint;
+
+  factory SubjectReportType.fromJson(Map<String, dynamic> json) {
+    return SubjectReportType(
+      subjectName: (json['subjectName'] as String?) ?? '',
+      url: (json['url'] as String?) ?? '',
+      icon: (json['icon'] as String?) ?? '',
+      knowledgePoint: (json['knowledgePoint'] as num?)?.toInt() ?? 0,
+    );
+  }
+}
+
+/// 当前用户诊断报告整体
+class UserReportType {
+  const UserReportType({
+    this.userName = '',
+    this.userLevel = '',
+    this.subjectReports = const [],
+  });
+
+  final String userName;
+  final String userLevel;
+  final List<SubjectReportType> subjectReports;
+
+  factory UserReportType.fromJson(Map<String, dynamic> json) {
+    final payload = (json['data'] as Map<String, dynamic>?) ?? json;
+    return UserReportType(
+      userName: (payload['userName'] as String?) ?? '',
+      userLevel: (payload['userLevel'] as String?) ?? '',
+      subjectReports: (payload['subjectReports'] as List<dynamic>? ?? const [])
+          .whereType<Map<String, dynamic>>()
+          .map(SubjectReportType.fromJson)
+          .toList(),
+    );
+  }
+}
+
+/// 当前用户未掌握的知识点（reportComputation AI加载动画页用）
+class UserReportKnowType {
+  const UserReportKnowType({
+    this.subjectName = '',
+    this.knowCount = 0,
+  });
+
+  final String subjectName;
+  final int knowCount;
+
+  factory UserReportKnowType.fromJson(Map<String, dynamic> json) {
+    return UserReportKnowType(
+      subjectName: (json['subjectName'] as String?) ?? '',
+      knowCount: (json['knowCount'] as num?)?.toInt() ?? 0,
+    );
+  }
+}