feat：参照研听的基础工程

lib/features/auth/data/auth_models.dart

@@ -0,0 +1,26 @@
+class JinzhiUser {
+  const JinzhiUser({
+    required this.phone,
+    required this.nickname,
+    required this.createdAt,
+  });
+
+  final String phone;
+  final String nickname;
+  final DateTime createdAt;
+}
+
+sealed class AuthState {
+  const AuthState();
+}
+
+class GuestAuthState extends AuthState {
+  const GuestAuthState();
+}
+
+class LoggedInAuthState extends AuthState {
+  const LoggedInAuthState({required this.user, required this.token});
+
+  final JinzhiUser user;
+  final String token;
+}