diff --git a/analysis_options.yaml b/analysis_options.yaml
index f9b3034..e07e9e9 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1 +1,5 @@
 include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  errors:
+    invalid_annotation_target: ignore
diff --git a/lib/data/models/server_problem.dart b/lib/data/models/server_problem.dart
index 2e1979e..d463e76 100644
--- a/lib/data/models/server_problem.dart
+++ b/lib/data/models/server_problem.dart
@@ -1,88 +1,24 @@
-import 'package:flutter/material.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
 
-@immutable
-class ServerProblem {
-  final String id;
-  final String title;
-  final String location;
-  final String? censorTaskId;
-  final String? rowId;
-  final String? bindData;
-  final List<String>? imageUrls;
-  final DateTime creationTime;
-  final String creatorId;
-  final DateTime lastModificationTime;
-  final String lastModifierId;
+part 'server_problem.freezed.dart';
+part 'server_problem.g.dart';
 
-  const ServerProblem({
-    required this.id,
-    required this.title,
-    required this.location,
-    this.censorTaskId,
-    this.rowId,
-    this.bindData,
-    this.imageUrls,
-    required this.creationTime,
-    required this.creatorId,
-    required this.lastModificationTime,
-    required this.lastModifierId,
-  });
-
-  factory ServerProblem.fromJson(Map<String, dynamic> json) => ServerProblem(
-    id: json['id'] as String,
-    title: json['title'] as String,
-    location: json['location'] as String,
-    censorTaskId: json['censorTaskId'] as String?,
-    rowId: json['rowId'] as String?,
-    bindData: json['bindData'] as String?,
-    imageUrls: json['imageUrls'] as List<String>?,
-    creationTime: DateTime.parse(json['creationTime'] as String),
-    creatorId: json['creatorId'] as String,
-    lastModificationTime: DateTime.parse(
-      json['lastModificationTime'] as String,
-    ),
-    lastModifierId: json['lastModifierId'] as String,
-  );
-
-  Map<String, dynamic> toJson() => {
-    'id': id,
-    'title': title,
-    'location': location,
-    'censorTaskId': censorTaskId,
-    'rowId': rowId,
-    'bindData': bindData,
-    'imageUrls': imageUrls,
-    'creationTime': creationTime.toUtc().toIso8601String(),
-    'creatorId': creatorId,
-    'lastModificationTime': lastModificationTime.toUtc().toIso8601String(),
-    'lastModifierId': lastModifierId,
-  };
-
-  ServerProblem copyWith({
-    String? id,
-    String? title,
-    String? location,
+@freezed
+abstract class ServerProblem with _$ServerProblem {
+  const factory ServerProblem({
+    required String id,
+    required String title,
+    required String location,
     String? censorTaskId,
     String? rowId,
     String? bindData,
     List<String>? imageUrls,
-    DateTime? creationTime,
-    String? creatorId,
+    required DateTime creationTime,
+    required String creatorId,
     DateTime? lastModificationTime,
     String? lastModifierId,
-  }) {
-    return ServerProblem(
-      id: id ?? this.id,
-      title: title ?? this.title,
-      location: location ?? this.location,
-      censorTaskId: censorTaskId ?? this.censorTaskId,
-      rowId: rowId ?? this.rowId,
-      bindData: bindData ?? this.bindData,
-      imageUrls: imageUrls ?? this.imageUrls,
-      creationTime: creationTime ?? this.creationTime,
-      creatorId: creatorId ?? this.creatorId,
-      lastModificationTime: lastModificationTime ?? this.lastModificationTime,
-      lastModifierId: lastModifierId ?? this.lastModifierId,
-    );
-  }
+  }) = _ServerProblem;
+
+  factory ServerProblem.fromJson(Map<String, Object?> json) =>
+      _$ServerProblemFromJson(json);
 }
diff --git a/lib/data/models/server_problem.freezed.dart b/lib/data/models/server_problem.freezed.dart
new file mode 100644
index 0000000..e331dee
--- /dev/null
+++ b/lib/data/models/server_problem.freezed.dart
@@ -0,0 +1,315 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// coverage:ignore-file
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'server_problem.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+// dart format off
+T _$identity<T>(T value) => value;
+
+/// @nodoc
+mixin _$ServerProblem {
+
+ String get id; String get title; String get location; String? get censorTaskId; String? get rowId; String? get bindData; List<String>? get imageUrls; DateTime get creationTime; String get creatorId; DateTime? get lastModificationTime; String? get lastModifierId;
+/// Create a copy of ServerProblem
+/// with the given fields replaced by the non-null parameter values.
+@JsonKey(includeFromJson: false, includeToJson: false)
+@pragma('vm:prefer-inline')
+$ServerProblemCopyWith<ServerProblem> get copyWith => _$ServerProblemCopyWithImpl<ServerProblem>(this as ServerProblem, _$identity);
+
+  /// Serializes this ServerProblem to a JSON map.
+  Map<String, dynamic> toJson();
+
+
+@override
+bool operator ==(Object other) {
+  return identical(this, other) || (other.runtimeType == runtimeType&&other is ServerProblem&&(identical(other.id, id) || other.id == id)&&(identical(other.title, title) || other.title == title)&&(identical(other.location, location) || other.location == location)&&(identical(other.censorTaskId, censorTaskId) || other.censorTaskId == censorTaskId)&&(identical(other.rowId, rowId) || other.rowId == rowId)&&(identical(other.bindData, bindData) || other.bindData == bindData)&&const DeepCollectionEquality().equals(other.imageUrls, imageUrls)&&(identical(other.creationTime, creationTime) || other.creationTime == creationTime)&&(identical(other.creatorId, creatorId) || other.creatorId == creatorId)&&(identical(other.lastModificationTime, lastModificationTime) || other.lastModificationTime == lastModificationTime)&&(identical(other.lastModifierId, lastModifierId) || other.lastModifierId == lastModifierId));
+}
+
+@JsonKey(includeFromJson: false, includeToJson: false)
+@override
+int get hashCode => Object.hash(runtimeType,id,title,location,censorTaskId,rowId,bindData,const DeepCollectionEquality().hash(imageUrls),creationTime,creatorId,lastModificationTime,lastModifierId);
+
+@override
+String toString() {
+  return 'ServerProblem(id: $id, title: $title, location: $location, censorTaskId: $censorTaskId, rowId: $rowId, bindData: $bindData, imageUrls: $imageUrls, creationTime: $creationTime, creatorId: $creatorId, lastModificationTime: $lastModificationTime, lastModifierId: $lastModifierId)';
+}
+
+
+}
+
+/// @nodoc
+abstract mixin class $ServerProblemCopyWith<$Res>  {
+  factory $ServerProblemCopyWith(ServerProblem value, $Res Function(ServerProblem) _then) = _$ServerProblemCopyWithImpl;
+@useResult
+$Res call({
+ String id, String title, String location, String? censorTaskId, String? rowId, String? bindData, List<String>? imageUrls, DateTime creationTime, String creatorId, DateTime? lastModificationTime, String? lastModifierId
+});
+
+
+
+
+}
+/// @nodoc
+class _$ServerProblemCopyWithImpl<$Res>
+    implements $ServerProblemCopyWith<$Res> {
+  _$ServerProblemCopyWithImpl(this._self, this._then);
+
+  final ServerProblem _self;
+  final $Res Function(ServerProblem) _then;
+
+/// Create a copy of ServerProblem
+/// with the given fields replaced by the non-null parameter values.
+@pragma('vm:prefer-inline') @override $Res call({Object? id = null,Object? title = null,Object? location = null,Object? censorTaskId = freezed,Object? rowId = freezed,Object? bindData = freezed,Object? imageUrls = freezed,Object? creationTime = null,Object? creatorId = null,Object? lastModificationTime = freezed,Object? lastModifierId = freezed,}) {
+  return _then(_self.copyWith(
+id: null == id ? _self.id : id // ignore: cast_nullable_to_non_nullable
+as String,title: null == title ? _self.title : title // ignore: cast_nullable_to_non_nullable
+as String,location: null == location ? _self.location : location // ignore: cast_nullable_to_non_nullable
+as String,censorTaskId: freezed == censorTaskId ? _self.censorTaskId : censorTaskId // ignore: cast_nullable_to_non_nullable
+as String?,rowId: freezed == rowId ? _self.rowId : rowId // ignore: cast_nullable_to_non_nullable
+as String?,bindData: freezed == bindData ? _self.bindData : bindData // ignore: cast_nullable_to_non_nullable
+as String?,imageUrls: freezed == imageUrls ? _self.imageUrls : imageUrls // ignore: cast_nullable_to_non_nullable
+as List<String>?,creationTime: null == creationTime ? _self.creationTime : creationTime // ignore: cast_nullable_to_non_nullable
+as DateTime,creatorId: null == creatorId ? _self.creatorId : creatorId // ignore: cast_nullable_to_non_nullable
+as String,lastModificationTime: freezed == lastModificationTime ? _self.lastModificationTime : lastModificationTime // ignore: cast_nullable_to_non_nullable
+as DateTime?,lastModifierId: freezed == lastModifierId ? _self.lastModifierId : lastModifierId // ignore: cast_nullable_to_non_nullable
+as String?,
+  ));
+}
+
+}
+
+
+/// Adds pattern-matching-related methods to [ServerProblem].
+extension ServerProblemPatterns on ServerProblem {
+/// A variant of `map` that fallback to returning `orElse`.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case _:
+///     return orElse();
+/// }
+/// ```
+
+@optionalTypeArgs TResult maybeMap<TResult extends Object?>(TResult Function( _ServerProblem value)?  $default,{required TResult orElse(),}){
+final _that = this;
+switch (_that) {
+case _ServerProblem() when $default != null:
+return $default(_that);case _:
+  return orElse();
+
+}
+}
+/// A `switch`-like method, using callbacks.
+///
+/// Callbacks receives the raw object, upcasted.
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case final Subclass2 value:
+///     return ...;
+/// }
+/// ```
+
+@optionalTypeArgs TResult map<TResult extends Object?>(TResult Function( _ServerProblem value)  $default,){
+final _that = this;
+switch (_that) {
+case _ServerProblem():
+return $default(_that);case _:
+  throw StateError('Unexpected subclass');
+
+}
+}
+/// A variant of `map` that fallback to returning `null`.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case final Subclass value:
+///     return ...;
+///   case _:
+///     return null;
+/// }
+/// ```
+
+@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>(TResult? Function( _ServerProblem value)?  $default,){
+final _that = this;
+switch (_that) {
+case _ServerProblem() when $default != null:
+return $default(_that);case _:
+  return null;
+
+}
+}
+/// A variant of `when` that fallback to an `orElse` callback.
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case _:
+///     return orElse();
+/// }
+/// ```
+
+@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( String id,  String title,  String location,  String? censorTaskId,  String? rowId,  String? bindData,  List<String>? imageUrls,  DateTime creationTime,  String creatorId,  DateTime? lastModificationTime,  String? lastModifierId)?  $default,{required TResult orElse(),}) {final _that = this;
+switch (_that) {
+case _ServerProblem() when $default != null:
+return $default(_that.id,_that.title,_that.location,_that.censorTaskId,_that.rowId,_that.bindData,_that.imageUrls,_that.creationTime,_that.creatorId,_that.lastModificationTime,_that.lastModifierId);case _:
+  return orElse();
+
+}
+}
+/// A `switch`-like method, using callbacks.
+///
+/// As opposed to `map`, this offers destructuring.
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case Subclass2(:final field2):
+///     return ...;
+/// }
+/// ```
+
+@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String id,  String title,  String location,  String? censorTaskId,  String? rowId,  String? bindData,  List<String>? imageUrls,  DateTime creationTime,  String creatorId,  DateTime? lastModificationTime,  String? lastModifierId)  $default,) {final _that = this;
+switch (_that) {
+case _ServerProblem():
+return $default(_that.id,_that.title,_that.location,_that.censorTaskId,_that.rowId,_that.bindData,_that.imageUrls,_that.creationTime,_that.creatorId,_that.lastModificationTime,_that.lastModifierId);case _:
+  throw StateError('Unexpected subclass');
+
+}
+}
+/// A variant of `when` that fallback to returning `null`
+///
+/// It is equivalent to doing:
+/// ```dart
+/// switch (sealedClass) {
+///   case Subclass(:final field):
+///     return ...;
+///   case _:
+///     return null;
+/// }
+/// ```
+
+@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String id,  String title,  String location,  String? censorTaskId,  String? rowId,  String? bindData,  List<String>? imageUrls,  DateTime creationTime,  String creatorId,  DateTime? lastModificationTime,  String? lastModifierId)?  $default,) {final _that = this;
+switch (_that) {
+case _ServerProblem() when $default != null:
+return $default(_that.id,_that.title,_that.location,_that.censorTaskId,_that.rowId,_that.bindData,_that.imageUrls,_that.creationTime,_that.creatorId,_that.lastModificationTime,_that.lastModifierId);case _:
+  return null;
+
+}
+}
+
+}
+
+/// @nodoc
+@JsonSerializable()
+
+class _ServerProblem implements ServerProblem {
+  const _ServerProblem({required this.id, required this.title, required this.location, this.censorTaskId, this.rowId, this.bindData, final  List<String>? imageUrls, required this.creationTime, required this.creatorId, this.lastModificationTime, this.lastModifierId}): _imageUrls = imageUrls;
+  factory _ServerProblem.fromJson(Map<String, dynamic> json) => _$ServerProblemFromJson(json);
+
+@override final  String id;
+@override final  String title;
+@override final  String location;
+@override final  String? censorTaskId;
+@override final  String? rowId;
+@override final  String? bindData;
+ final  List<String>? _imageUrls;
+@override List<String>? get imageUrls {
+  final value = _imageUrls;
+  if (value == null) return null;
+  if (_imageUrls is EqualUnmodifiableListView) return _imageUrls;
+  // ignore: implicit_dynamic_type
+  return EqualUnmodifiableListView(value);
+}
+
+@override final  DateTime creationTime;
+@override final  String creatorId;
+@override final  DateTime? lastModificationTime;
+@override final  String? lastModifierId;
+
+/// Create a copy of ServerProblem
+/// with the given fields replaced by the non-null parameter values.
+@override @JsonKey(includeFromJson: false, includeToJson: false)
+@pragma('vm:prefer-inline')
+_$ServerProblemCopyWith<_ServerProblem> get copyWith => __$ServerProblemCopyWithImpl<_ServerProblem>(this, _$identity);
+
+@override
+Map<String, dynamic> toJson() {
+  return _$ServerProblemToJson(this, );
+}
+
+@override
+bool operator ==(Object other) {
+  return identical(this, other) || (other.runtimeType == runtimeType&&other is _ServerProblem&&(identical(other.id, id) || other.id == id)&&(identical(other.title, title) || other.title == title)&&(identical(other.location, location) || other.location == location)&&(identical(other.censorTaskId, censorTaskId) || other.censorTaskId == censorTaskId)&&(identical(other.rowId, rowId) || other.rowId == rowId)&&(identical(other.bindData, bindData) || other.bindData == bindData)&&const DeepCollectionEquality().equals(other._imageUrls, _imageUrls)&&(identical(other.creationTime, creationTime) || other.creationTime == creationTime)&&(identical(other.creatorId, creatorId) || other.creatorId == creatorId)&&(identical(other.lastModificationTime, lastModificationTime) || other.lastModificationTime == lastModificationTime)&&(identical(other.lastModifierId, lastModifierId) || other.lastModifierId == lastModifierId));
+}
+
+@JsonKey(includeFromJson: false, includeToJson: false)
+@override
+int get hashCode => Object.hash(runtimeType,id,title,location,censorTaskId,rowId,bindData,const DeepCollectionEquality().hash(_imageUrls),creationTime,creatorId,lastModificationTime,lastModifierId);
+
+@override
+String toString() {
+  return 'ServerProblem(id: $id, title: $title, location: $location, censorTaskId: $censorTaskId, rowId: $rowId, bindData: $bindData, imageUrls: $imageUrls, creationTime: $creationTime, creatorId: $creatorId, lastModificationTime: $lastModificationTime, lastModifierId: $lastModifierId)';
+}
+
+
+}
+
+/// @nodoc
+abstract mixin class _$ServerProblemCopyWith<$Res> implements $ServerProblemCopyWith<$Res> {
+  factory _$ServerProblemCopyWith(_ServerProblem value, $Res Function(_ServerProblem) _then) = __$ServerProblemCopyWithImpl;
+@override @useResult
+$Res call({
+ String id, String title, String location, String? censorTaskId, String? rowId, String? bindData, List<String>? imageUrls, DateTime creationTime, String creatorId, DateTime? lastModificationTime, String? lastModifierId
+});
+
+
+
+
+}
+/// @nodoc
+class __$ServerProblemCopyWithImpl<$Res>
+    implements _$ServerProblemCopyWith<$Res> {
+  __$ServerProblemCopyWithImpl(this._self, this._then);
+
+  final _ServerProblem _self;
+  final $Res Function(_ServerProblem) _then;
+
+/// Create a copy of ServerProblem
+/// with the given fields replaced by the non-null parameter values.
+@override @pragma('vm:prefer-inline') $Res call({Object? id = null,Object? title = null,Object? location = null,Object? censorTaskId = freezed,Object? rowId = freezed,Object? bindData = freezed,Object? imageUrls = freezed,Object? creationTime = null,Object? creatorId = null,Object? lastModificationTime = freezed,Object? lastModifierId = freezed,}) {
+  return _then(_ServerProblem(
+id: null == id ? _self.id : id // ignore: cast_nullable_to_non_nullable
+as String,title: null == title ? _self.title : title // ignore: cast_nullable_to_non_nullable
+as String,location: null == location ? _self.location : location // ignore: cast_nullable_to_non_nullable
+as String,censorTaskId: freezed == censorTaskId ? _self.censorTaskId : censorTaskId // ignore: cast_nullable_to_non_nullable
+as String?,rowId: freezed == rowId ? _self.rowId : rowId // ignore: cast_nullable_to_non_nullable
+as String?,bindData: freezed == bindData ? _self.bindData : bindData // ignore: cast_nullable_to_non_nullable
+as String?,imageUrls: freezed == imageUrls ? _self._imageUrls : imageUrls // ignore: cast_nullable_to_non_nullable
+as List<String>?,creationTime: null == creationTime ? _self.creationTime : creationTime // ignore: cast_nullable_to_non_nullable
+as DateTime,creatorId: null == creatorId ? _self.creatorId : creatorId // ignore: cast_nullable_to_non_nullable
+as String,lastModificationTime: freezed == lastModificationTime ? _self.lastModificationTime : lastModificationTime // ignore: cast_nullable_to_non_nullable
+as DateTime?,lastModifierId: freezed == lastModifierId ? _self.lastModifierId : lastModifierId // ignore: cast_nullable_to_non_nullable
+as String?,
+  ));
+}
+
+
+}
+
+// dart format on
diff --git a/lib/data/models/server_problem.g.dart b/lib/data/models/server_problem.g.dart
new file mode 100644
index 0000000..47770d4
--- /dev/null
+++ b/lib/data/models/server_problem.g.dart
@@ -0,0 +1,41 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'server_problem.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_ServerProblem _$ServerProblemFromJson(Map<String, dynamic> json) =>
+    _ServerProblem(
+      id: json['id'] as String,
+      title: json['title'] as String,
+      location: json['location'] as String,
+      censorTaskId: json['censorTaskId'] as String?,
+      rowId: json['rowId'] as String?,
+      bindData: json['bindData'] as String?,
+      imageUrls: (json['imageUrls'] as List<dynamic>?)
+          ?.map((e) => e as String)
+          .toList(),
+      creationTime: DateTime.parse(json['creationTime'] as String),
+      creatorId: json['creatorId'] as String,
+      lastModificationTime: json['lastModificationTime'] == null
+          ? null
+          : DateTime.parse(json['lastModificationTime'] as String),
+      lastModifierId: json['lastModifierId'] as String?,
+    );
+
+Map<String, dynamic> _$ServerProblemToJson(_ServerProblem instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'title': instance.title,
+      'location': instance.location,
+      'censorTaskId': instance.censorTaskId,
+      'rowId': instance.rowId,
+      'bindData': instance.bindData,
+      'imageUrls': instance.imageUrls,
+      'creationTime': instance.creationTime.toIso8601String(),
+      'creatorId': instance.creatorId,
+      'lastModificationTime': instance.lastModificationTime?.toIso8601String(),
+      'lastModifierId': instance.lastModifierId,
+    };
diff --git a/lib/data/repositories/file_repository.dart b/lib/data/repositories/file_repository.dart
index 58abb29..d17813e 100644
--- a/lib/data/repositories/file_repository.dart
+++ b/lib/data/repositories/file_repository.dart
@@ -1,14 +1,9 @@
-import 'dart:io';
-
 import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart'; // 引入 kDebugMode 和 debugPrint
 import 'package:get/get.dart' hide FormData, MultipartFile;
 import 'package:path/path.dart' as p;
-import 'package:path_provider/path_provider.dart';
 import 'package:problem_check_system/core/extensions/http_response_extension.dart';
 import 'package:problem_check_system/core/utils/constants/api_endpoints.dart';
-import 'package:problem_check_system/data/models/image_metadata_model.dart';
-import 'package:problem_check_system/data/models/image_status.dart';
 import 'package:problem_check_system/data/providers/http_provider.dart';
 
 class FileRepository {
@@ -66,102 +61,4 @@ class FileRepository {
       throw Exception('图片上传发生未知错误: $e');
     }
   }
-
-  // 新增的下载方法
-  Future<ImageMetadata> downloadImage(
-    String imageUrl, {
-    CancelToken? cancelToken,
-    void Function(int received, int total)? onReceiveProgress,
-  }) async {
-    final directory = await getApplicationDocumentsDirectory();
-    final imagesDir = Directory('${directory.path}/problem_images');
-
-    // 确保目录存在
-    if (!await imagesDir.exists()) {
-      await imagesDir.create(recursive: true);
-    }
-
-    // 生成唯一的文件名
-    final String fileName =
-        'downloaded_${DateTime.now().millisecondsSinceEpoch}_${imageUrl.hashCode}${_getFileExtension(imageUrl)}';
-    final String imagePath = '${imagesDir.path}/$fileName';
-
-    try {
-      // 下载图片
-      await _httpProvider.download(
-        imageUrl,
-        imagePath,
-        cancelToken: cancelToken,
-        onReceiveProgress: onReceiveProgress,
-      );
-
-      // 返回图片元数据
-      return ImageMetadata(
-        localPath: imagePath,
-        remoteUrl: imageUrl,
-        status: ImageStatus.synced,
-      );
-    } catch (e) {
-      // 清理可能创建的不完整文件
-      final file = File(imagePath);
-      if (await file.exists()) {
-        await file.delete();
-      }
-      rethrow;
-    }
-  }
-
-  // 批量下载方法
-  Future<List<ImageMetadata>> downloadImages(
-    List<String> imageUrls, {
-    CancelToken? cancelToken,
-    void Function(int current, int total)? onProgress,
-  }) async {
-    final List<ImageMetadata> results = [];
-    int downloadedCount = 0;
-
-    for (final imageUrl in imageUrls) {
-      if (cancelToken?.isCancelled == true) {
-        break;
-      }
-
-      try {
-        final metadata = await downloadImage(
-          imageUrl,
-          cancelToken: cancelToken,
-          onReceiveProgress: (received, total) {
-            // 单个文件的进度可以在这里处理
-          },
-        );
-        results.add(metadata);
-
-        // 更新总体进度
-        downloadedCount++;
-        onProgress?.call(downloadedCount, imageUrls.length);
-      } catch (e) {
-        Get.log('Failed to download image $imageUrl: $e');
-        // 可以选择继续下载其他图片或抛出异常
-      }
-    }
-
-    return results;
-  }
-
-  // 辅助方法：获取文件扩展名
-  String _getFileExtension(String url) {
-    try {
-      final uri = Uri.parse(url);
-      final pathSegments = uri.pathSegments;
-      if (pathSegments.isNotEmpty) {
-        final fileName = pathSegments.last;
-        final dotIndex = fileName.lastIndexOf('.');
-        if (dotIndex != -1 && dotIndex < fileName.length - 1) {
-          return fileName.substring(dotIndex);
-        }
-      }
-      return '.jpg';
-    } catch (e) {
-      return '.jpg';
-    }
-  }
 }
diff --git a/lib/data/repositories/problem_repository.dart b/lib/data/repositories/problem_repository.dart
index 38c96a8..e84b67b 100644
--- a/lib/data/repositories/problem_repository.dart
+++ b/lib/data/repositories/problem_repository.dart
@@ -76,14 +76,21 @@ class ProblemRepository extends GetxService {
       );
 
       if (response.isSuccess) {
-        // 假设服务器返回的是Problem对象的列表
-        final List<dynamic> data = response.data;
-        return data.map((json) => ServerProblem.fromJson(json)).toList();
+        // Dio 会自动解析 JSON，response.data 已经是 Map 或 List
+        final Map<String, dynamic> data = response.data;
+        final List<dynamic> items = data['items'];
+
+        // 使用 Freezed 生成的 fromJson 方法
+        return items.map((item) => ServerProblem.fromJson(item)).toList();
       } else {
         throw Exception('拉取问题失败: ${response.statusCode}');
       }
     } on DioException catch (e) {
-      throw Exception('拉取问题失败: $e');
+      Get.log("Dio 异常$e");
+      rethrow;
+    } catch (e) {
+      Get.log("解析失败：$e");
+      rethrow;
     }
   }
 
diff --git a/lib/modules/problem/controllers/problem_controller.dart b/lib/modules/problem/controllers/problem_controller.dart
index dabcdb7..ed3f412 100644
--- a/lib/modules/problem/controllers/problem_controller.dart
+++ b/lib/modules/problem/controllers/problem_controller.dart
@@ -16,8 +16,10 @@ import 'package:problem_check_system/data/repositories/file_repository.dart';
 import 'package:problem_check_system/data/repositories/image_repository.dart';
 import 'package:problem_check_system/data/repositories/problem_repository.dart';
 import 'package:problem_check_system/data/models/problem_model.dart';
+import 'package:problem_check_system/modules/problem/controllers/sync_progress_state.dart';
 import 'package:problem_check_system/modules/problem/views/widgets/models/date_range_enum.dart';
 import 'package:problem_check_system/modules/problem/views/widgets/models/dropdown_option.dart';
+import 'package:problem_check_system/modules/problem/views/widgets/sync_progress_dialog.dart';
 
 class ProblemController extends GetxController
     with GetSingleTickerProviderStateMixin {
@@ -73,7 +75,7 @@ class ProblemController extends GetxController
 
   // 历史问题列表筛选条件
   final Rx<DateTime> historyStartTime = DateTime.now()
-      .subtract(const Duration(days: 7))
+      .subtract(const Duration(days: 365))
       .obs;
   final Rx<DateTime> historyEndTime = DateTime(
     DateTime.now().year,
@@ -440,18 +442,33 @@ class ProblemController extends GetxController
   // #endregion
 
   // #region 问题同步
-  // TODO 同步服务器问题到本地
+
+  final SyncProgressState syncProgress = SyncProgressState();
+
   Future<void> pullDataFromServer() async {
     isLoading.value = true;
+
+    // 显示进度对话框
+    Get.dialog(
+      SyncProgressDialog(progressState: syncProgress),
+      barrierDismissible: false,
+    );
+
     try {
+      const int totalSteps = 4;
+      syncProgress.startSync(totalSteps);
+
       // 1. 从服务器获取最新数据
+      syncProgress.updateProgress('正在从服务器获取数据...', 1);
       final List<ServerProblem> serverProblems = await problemRepository
-          .fetchProblemsFromServer();
+          .fetchProblemsFromServer(pageNumber: 1, pageSize: 99);
 
       // 2. 获取本地数据
+      syncProgress.updateProgress('正在获取本地数据...', 2);
       final List<Problem> localProblems = await problemRepository.getProblems();
 
       // 3. 同步策略：以服务器数据为准，保留本地未同步的更改
+      syncProgress.updateProgress('正在同步数据...', 3);
       final List<Problem> downloadedProblems = await _syncProblems(
         serverProblems,
         localProblems,
@@ -461,10 +478,20 @@ class ProblemController extends GetxController
       _downloadImagesForProblems(downloadedProblems);
 
       // 5. 重新加载本地问题列表
+      syncProgress.updateProgress('正在重新加载数据...', 4);
       await loadProblems();
 
+      syncProgress.completeSync();
+
+      // 关闭对话框
+      Get.back();
+
       Get.snackbar('成功', '数据同步完成', snackPosition: SnackPosition.TOP);
     } catch (e) {
+      syncProgress.errorSync(e.toString());
+
+      // 关闭对话框并显示错误
+      Get.back();
       Get.snackbar('同步失败', '错误: $e', snackPosition: SnackPosition.TOP);
     } finally {
       isLoading.value = false;
@@ -578,7 +605,7 @@ class ProblemController extends GetxController
           final serverUpdated = serverProblem.lastModificationTime;
           final localUpdated = localProblem.lastModifiedTime;
 
-          if (serverUpdated.isAfter(localUpdated)) {
+          if (serverUpdated != null && serverUpdated.isAfter(localUpdated)) {
             // 服务器数据更新，更新本地数据
             final updatedProblem = _convertServerProblemToLocal(serverProblem);
             await problemRepository.updateProblem(updatedProblem);
@@ -611,7 +638,7 @@ class ProblemController extends GetxController
       location: serverProblem.location,
       imageUrls: imageMetadatas,
       creationTime: serverProblem.creationTime,
-      lastModifiedTime: serverProblem.lastModificationTime,
+      lastModifiedTime: serverProblem.lastModificationTime ?? DateTime.now(),
       syncStatus: ProblemSyncStatus.synced, // 来自服务器的数据标记为已同步
       censorTaskId: serverProblem.censorTaskId,
       bindData: serverProblem.bindData,
diff --git a/lib/modules/problem/controllers/sync_progress_state.dart b/lib/modules/problem/controllers/sync_progress_state.dart
new file mode 100644
index 0000000..308c90b
--- /dev/null
+++ b/lib/modules/problem/controllers/sync_progress_state.dart
@@ -0,0 +1,35 @@
+// sync_progress_state.dart
+import 'package:get/get.dart';
+
+class SyncProgressState {
+  final RxBool isSyncing = false.obs;
+  final RxString currentStep = ''.obs;
+  final RxDouble progress = 0.0.obs;
+  final RxInt totalSteps = 0.obs;
+  final RxInt completedSteps = 0.obs;
+
+  void startSync(int totalSteps) {
+    isSyncing.value = true;
+    this.totalSteps.value = totalSteps;
+    completedSteps.value = 0;
+    progress.value = 0.0;
+    currentStep.value = '开始同步...';
+  }
+
+  void updateProgress(String step, int completed) {
+    completedSteps.value = completed;
+    progress.value = completed / totalSteps.value;
+    currentStep.value = step;
+  }
+
+  void completeSync() {
+    isSyncing.value = false;
+    currentStep.value = '同步完成';
+    progress.value = 1.0;
+  }
+
+  void errorSync(String error) {
+    isSyncing.value = false;
+    currentStep.value = '同步失败: $error';
+  }
+}
diff --git a/lib/modules/problem/views/widgets/sync_progress_dialog.dart b/lib/modules/problem/views/widgets/sync_progress_dialog.dart
new file mode 100644
index 0000000..aee6d1c
--- /dev/null
+++ b/lib/modules/problem/views/widgets/sync_progress_dialog.dart
@@ -0,0 +1,40 @@
+// sync_progress_dialog.dart
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+import 'package:problem_check_system/modules/problem/controllers/sync_progress_state.dart';
+
+class SyncProgressDialog extends StatelessWidget {
+  final SyncProgressState progressState;
+
+  const SyncProgressDialog({super.key, required this.progressState});
+
+  @override
+  Widget build(BuildContext context) {
+    return Obx(
+      () => AlertDialog(
+        title: const Text('数据同步中'),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            LinearProgressIndicator(
+              value: progressState.progress.value,
+              backgroundColor: Colors.grey[300],
+              valueColor: const AlwaysStoppedAnimation<Color>(Colors.blue),
+            ),
+            const SizedBox(height: 16),
+            Text(
+              progressState.currentStep.value,
+              style: const TextStyle(fontSize: 14),
+              textAlign: TextAlign.center,
+            ),
+            const SizedBox(height: 8),
+            Text(
+              '${(progressState.progress.value * 100).toStringAsFixed(1)}%',
+              style: const TextStyle(fontSize: 12, color: Colors.grey),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
diff --git a/pubspec.lock b/pubspec.lock
index a48b1f2..12d8278 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,22 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: f0bb5d1648339c8308cc0b9838d8456b3cfe5c91f9dc1a735b4d003269e5da9a
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "88.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "0b7b9c329d2879f8f05d6c05b32ee9ec025f39b077864bdb5ac9a7b63418a98f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "8.1.1"
   args:
     dependency: transitive
     description:
@@ -25,6 +41,54 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.2"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      sha256: "5b887c55a0f734b433b3b2d89f9cd1f99eb636b17e268a5b4259258bc916504b"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.0.0"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      sha256: "4f64382b97504dc2fcdf487d5aae33418e08b4703fc21249e4db6d804a4d0187"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.0"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      sha256: "8e928697a82be082206edb0b9c99c5a4ad6bc31c9e9b8b2f291ae65cd4a25daa"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.0.4"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      sha256: "804c47c936df75e1911c19a4fb8c46fa8ff2b3099b9f2b2aa4726af3774f734b"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.8.0"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      sha256: "376e3dd27b51ea877c28d525560790aee2e6fbb5f20e2f85d5081027d94e2100"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      sha256: a30f0a0e38671e89a492c44d005b5545b830a961575bbd8336d42869ff71066d
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "8.12.0"
   characters:
     dependency: transitive
     description:
@@ -33,6 +97,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.4.0"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      sha256: "959525d3162f249993882720d52b7e0c833978df229be20702b33d48d91de70f"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.4"
   clock:
     dependency: transitive
     description:
@@ -41,6 +113,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.2"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      sha256: "0ec10bf4a89e4c613960bf1e8b42c64127021740fb21640c29c909826a5eea3e"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.10.1"
   collection:
     dependency: transitive
     description:
@@ -65,6 +145,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.2"
   cross_file:
     dependency: transitive
     description:
@@ -81,6 +169,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "3.0.6"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      sha256: c87dfe3d56f183ffe9106a18aebc6db431fc7c98c31a54b952a77f3d54a85697
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.2"
   dbus:
     dependency: transitive
     description:
@@ -129,6 +225,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.4"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "7.0.1"
   file_selector_linux:
     dependency: transitive
     description:
@@ -229,6 +333,30 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  freezed:
+    dependency: "direct dev"
+    description:
+      name: freezed
+      sha256: b6445822d9b3961a9d0f3def0b4297bd77314bdbfd1de0b62eaca27c93e9bc0f
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.2.2"
+  freezed_annotation:
+    dependency: "direct main"
+    description:
+      name: freezed_annotation
+      sha256: "7294967ff0a6d98638e7acb774aac3af2550777accd8149c90af5b014e6d44d8"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.0.0"
   get:
     dependency: "direct main"
     description:
@@ -245,6 +373,22 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.1"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.3"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      sha256: "741bbf84165310a68ff28fe9e727332eef1407342fca52759cb21ad8177bb8d0"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.3.2"
   http:
     dependency: transitive
     description:
@@ -253,6 +397,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.5.0"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.2.2"
   http_parser:
     dependency: transitive
     description:
@@ -333,6 +485,30 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "0.20.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.5"
+  json_annotation:
+    dependency: "direct main"
+    description:
+      name: json_annotation
+      sha256: "1ce844379ca14835a50d2f019a3099f419082cfdd231cd86a142af94dd5c6bb1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.9.0"
+  json_serializable:
+    dependency: "direct dev"
+    description:
+      name: json_serializable
+      sha256: "33a040668b31b320aafa4822b7b1e177e163fc3c1e835c6750319d4ab23aa6fe"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.11.1"
   leak_tracker:
     dependency: transitive
     description:
@@ -365,6 +541,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "5.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.0"
   matcher:
     dependency: transitive
     description:
@@ -405,6 +589,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "0.5.0"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.0"
   path:
     dependency: "direct main"
     description:
@@ -549,6 +741,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.8"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.5.1"
   pretty_dio_logger:
     dependency: "direct main"
     description:
@@ -557,11 +757,59 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.4.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.0"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      sha256: "0560ba233314abbed0a48a2956f7f022cce7c3e1e73df540277da7544cad4082"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.5.0"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.2"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.0"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      sha256: ccf30b0c9fbcd79d8b6f5bfac23199fb354938436f62475e14aea0f29ee0f800
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "4.0.1"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      sha256: "6a3c6cc82073a8797f8c4dc4572146114a39652851c157db37e964d9c7038723"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.8"
   source_span:
     dependency: transitive
     description:
@@ -634,6 +882,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.4"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      sha256: ad47125e588cfd37a9a7f86c7d6356dde8dfe89d071d293f80ca9e9273a33871
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
@@ -714,6 +970,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "15.0.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "5bf046f41320ac97a469d506261797f35254fa61c641741ef32dacda98b7d39c"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.3"
   web:
     dependency: transitive
     description:
@@ -722,6 +986,22 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.3"
   xdg_directories:
     dependency: transitive
     description:
@@ -738,6 +1018,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "6.6.1"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.3"
 sdks:
   dart: ">=3.8.1 <4.0.0"
   flutter: ">=3.29.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 2a3615f..34137a8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -16,10 +16,12 @@ dependencies:
   flutter_localizations:
     sdk: flutter
   flutter_screenutil: ^5.9.3
+  freezed_annotation: ^3.1.0
   get: ^4.7.2
   get_storage: ^2.1.1
   image_picker: ^1.1.2
   intl: ^0.20.2
+  json_annotation: ^4.9.0
   path: ^1.9.1
   path_provider: ^2.1.5
   permission_handler: ^12.0.1
@@ -32,6 +34,9 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   flutter_lints: ^5.0.0
+  build_runner: ^2.8.0
+  freezed: ^3.2.2
+  json_serializable: ^6.11.1
 
 flutter:
   uses-material-design: true