diff --git a/apps/im_app/lib/app/di/user_provider.dart b/apps/im_app/lib/app/di/user_provider.dart
new file mode 100644
index 0000000..9d6b95c
--- /dev/null
+++ b/apps/im_app/lib/app/di/user_provider.dart
@@ -0,0 +1,37 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:im_app/domain/usecases/insert_users_use_case.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:im_app/app/di/db_provider.dart';
+import 'package:im_app/data/repositories/user_repository_impl.dart';
+import 'package:im_app/domain/entities/user.dart';
+import 'package:im_app/domain/repositories/user_repository.dart';
+
+part 'user_provider.g.dart';
+
+// ── Repository ────────────────────────────────────────────────────────────────
+
+@riverpod
+UserRepository userRepository(Ref ref) {
+  return UserRepositoryImpl(ref.watch(storageSdkProvider));
+}
+
+// ── Use Cases ─────────────────────────────────────────────────────────────────
+
+/// 批量插入用户用例 Provider
+///
+/// 封装去重 + 分批插入逻辑，ViewModel 只需传入用户列表
+final insertUsersUseCaseProvider = Provider<InsertUsersUseCase>((ref) {
+  return InsertUsersUseCase(userRepository: ref.read(userRepositoryProvider));
+});
+
+// ── Streams ───────────────────────────────────────────────────────────────────
+
+@riverpod
+Stream<List<User>> users(Ref ref, Set<int> uids) {
+  return ref.watch(userRepositoryProvider).watchUsers(uids.toList());
+}
+
+@riverpod
+Stream<List<User>> allUsers(Ref ref) {
+  return ref.watch(userRepositoryProvider).watchAllUsers();
+}
diff --git a/apps/im_app/lib/app/notifiers/user_notifier.dart b/apps/im_app/lib/app/notifiers/user_notifier.dart
new file mode 100644
index 0000000..56ce957
--- /dev/null
+++ b/apps/im_app/lib/app/notifiers/user_notifier.dart
@@ -0,0 +1,69 @@
+import 'package:im_app/app/di/user_provider.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:im_app/data/local/drift/app_database.dart';
+import 'package:im_app/domain/entities/user.dart';
+import 'package:im_app/domain/repositories/user_repository.dart';
+
+part 'user_notifier.g.dart';
+
+/// 单个用户状态管理 (family — 每个 uid 独立 notifier)
+///
+/// ## 用法
+/// ```dart
+/// // 监听 — 自动重建
+/// final userAsync = ref.watch(userNotifierProvider(123));
+///
+/// // 即时读取，无需 await
+/// final user = ref.read(userNotifierProvider(123).notifier).current;
+///
+/// // 部分更新
+/// ref.read(userNotifierProvider(123).notifier).updateFields(
+///   UsersCompanion(nickname: Value('New Name')),
+/// );
+/// ```
+@riverpod
+class UserNotifier extends _$UserNotifier {
+  User? _cached;
+
+  UserRepository get _repo => ref.watch(userRepositoryProvider);
+
+  @override
+  Future<User?> build(int uid) async {
+    ref.onDispose(() => _cached = null);
+
+    // Stream starts automatically — uid is the family arg
+    _repo.watchUser(uid).listen((user) {
+      _cached = user;
+      state = AsyncData(user);
+    });
+
+    // Return initial DB value
+    return _repo.getUser(uid);
+  }
+
+  // ── 即时访问，无需 await ──────────────────────────────────────────────────
+
+  User? get current => _cached;
+
+  // ── 写入 ─────────────────────────────────────────────────────────────────
+
+  Future<void> saveUser(User user) async {
+    await _repo.saveUser(user);
+  }
+
+  Future<void> updateFields(UsersCompanion companion) async {
+    await _repo.updateFields(uid, companion); // uid from build arg
+  }
+
+  Future<void> updateUser(User user) async {
+    await _repo.saveUser(user);
+  }
+
+  // ── 删除 ─────────────────────────────────────────────────────────────────
+
+  Future<void> deleteUser() async {
+    await _repo.deleteUser(uid);
+    _cached = null;
+    state = const AsyncData(null);
+  }
+}
diff --git a/apps/im_app/lib/data/models/user_dto.dart b/apps/im_app/lib/data/models/user_dto.dart
deleted file mode 100644
index b47ae3c..0000000
--- a/apps/im_app/lib/data/models/user_dto.dart
+++ /dev/null
@@ -1,148 +0,0 @@
-import 'package:drift/drift.dart';
-import 'package:im_app/data/local/drift/app_database.dart';
-import 'package:im_app/domain/entities/user.dart';
-
-/// 用户 DTO（Data Transfer Object）
-///
-/// local / remote 共用的数据传输对象，放在 data/models/。
-/// 提供与 Domain Entity [User] 之间的双向转换。
-class UserDto {
-  final int uid;
-  final String? uuid;
-  final int? lastOnline;
-  final String? profilePic;
-  final String? profilePicGaussian;
-  final String? nickname;
-  final String? contact;
-  final String? countryCode;
-  final String? email;
-  final String? recoveryEmail;
-  final String? username;
-  final String? bio;
-  final int? relationship;
-  final String? userAlias;
-  final int? channelId;
-  final int? channelGroupId;
-  final String? hint;
-
-  const UserDto({
-    required this.uid,
-    this.uuid,
-    this.lastOnline,
-    this.profilePic,
-    this.profilePicGaussian,
-    this.nickname,
-    this.contact,
-    this.countryCode,
-    this.email,
-    this.recoveryEmail,
-    this.username,
-    this.bio,
-    this.relationship,
-    this.userAlias,
-    this.channelId,
-    this.channelGroupId,
-    this.hint,
-  });
-
-  factory UserDto.fromJson(Map<String, dynamic> json) => UserDto(
-    uid: json['uid'] as int,
-    uuid: json['uuid'],
-    lastOnline: json['last_online'],
-    profilePic: json['profile_pic'],
-    profilePicGaussian: json['profile_pic_gaussian'] ?? '',
-    nickname: json['nickname'],
-    contact: json['contact'],
-    countryCode: json['country_code'],
-    email: json['email'],
-    recoveryEmail: json['recovery_email'] ?? '',
-    username: json['username'],
-    bio: json['bio'] ?? '',
-    relationship: json['relationship'],
-    userAlias: json['user_alias'],
-    channelId: json['channel_id'],
-    channelGroupId: json['channel_group_id'],
-    hint: json['hint'],
-  );
-
-  Map<String, dynamic> toJson() => {
-    'uid': uid,
-    'uuid': uuid,
-    'last_online': lastOnline,
-    'profile_pic': profilePic,
-    'profile_pic_gaussian': profilePicGaussian,
-    'nickname': nickname,
-    'contact': contact,
-    'country_code': countryCode,
-    'email': email,
-    'recovery_email': recoveryEmail,
-    'username': username,
-    'bio': bio,
-    'relationship': relationship,
-    'user_alias': userAlias,
-    'channel_id': channelId,
-    'channel_group_id': channelGroupId,
-    'hint': hint,
-  };
-
-  /// DTO → Domain Entity
-  User toEntity() => User(
-    uid: uid,
-    uuid: uuid,
-    lastOnline: lastOnline,
-    profilePic: profilePic,
-    profilePicGaussian: profilePicGaussian,
-    nickname: nickname,
-    contact: contact,
-    countryCode: countryCode,
-    email: email,
-    recoveryEmail: recoveryEmail,
-    username: username,
-    bio: bio,
-    relationship: relationship,
-    userAlias: userAlias,
-    channelId: channelId,
-    channelGroupId: channelGroupId,
-    hint: hint,
-  );
-
-  /// Domain Entity → DTO
-  factory UserDto.fromEntity(User user) => UserDto(
-    uid: user.uid,
-    uuid: user.uuid,
-    lastOnline: user.lastOnline,
-    profilePic: user.profilePic,
-    profilePicGaussian: user.profilePicGaussian,
-    nickname: user.nickname,
-    contact: user.contact,
-    countryCode: user.countryCode,
-    email: user.email,
-    recoveryEmail: user.recoveryEmail,
-    username: user.username,
-    bio: user.bio,
-    relationship: user.relationship,
-    userAlias: user.userAlias,
-    channelId: user.channelId,
-    channelGroupId: user.channelGroupId,
-    hint: user.hint,
-  );
-
-  /// DTO → Drift Companion (for DB insert/update)
-  UsersCompanion toCompanion() => UsersCompanion(
-    uid: Value(uid),
-    uuid: Value(uuid),
-    lastOnline: Value(lastOnline),
-    profilePic: Value(profilePic),
-    profilePicGaussian: Value(profilePicGaussian ?? ''),
-    nickname: Value(nickname),
-    contact: Value(contact),
-    countryCode: Value(countryCode),
-    email: Value(email),
-    recoveryEmail: Value(recoveryEmail),
-    username: Value(username),
-    bio: Value(bio),
-    relationship: Value(relationship),
-    userAlias: Value(userAlias),
-    hint: Value(hint),
-  );
-}
diff --git a/apps/im_app/lib/data/remote/get_profile_request.dart b/apps/im_app/lib/data/remote/get_profile_request.dart
index 5030fec..c146970 100644
--- a/apps/im_app/lib/data/remote/get_profile_request.dart
+++ b/apps/im_app/lib/data/remote/get_profile_request.dart
@@ -91,8 +91,6 @@ class ProfileResponse {
     bio: bio,
     relationship: relationship,
     userAlias: userAlias,
-    channelId: channelId,
-    channelGroupId: channelGroupId,
     hint: hint,
   );
 }
diff --git a/apps/im_app/lib/data/remote/login_request.dart b/apps/im_app/lib/data/remote/login_request.dart
index b8b18a7..eaacb11 100644
--- a/apps/im_app/lib/data/remote/login_request.dart
+++ b/apps/im_app/lib/data/remote/login_request.dart
@@ -88,8 +88,6 @@ class LoginProfile {
     bio: bio,
     relationship: relationship,
     userAlias: userAlias,
-    channelId: channelId,
-    channelGroupId: channelGroupId,
     hint: hint,
   );
 }
diff --git a/apps/im_app/lib/data/repositories/user_repository_impl.dart b/apps/im_app/lib/data/repositories/user_repository_impl.dart
new file mode 100644
index 0000000..10fbc74
--- /dev/null
+++ b/apps/im_app/lib/data/repositories/user_repository_impl.dart
@@ -0,0 +1,238 @@
+import 'package:drift/drift.dart';
+import 'package:im_app/data/local/drift/app_database.dart';
+import 'package:im_app/domain/entities/user.dart';
+import 'package:im_app/domain/repositories/user_repository.dart';
+import 'package:storage_sdk/storage_sdk.dart';
+
+/// 用户仓储实现
+///
+/// ## 职责
+/// - 所有 DB 操作通过 [StorageSdkApi]，不直接接触 AppDatabase
+/// - DriftUser ↔ Domain User 映射
+/// - 持久化决策由调用方决定
+///
+/// ## 数据流
+/// ```
+/// 网络：User.fromJson(json) → (可选) saveUser(user) → StorageSdkApi → DB
+/// 监听：StorageSdkApi.watchWhere/watchAll → DriftUser → _toEntity() → UI
+/// 部分更新：updateFields(uid, UsersCompanion) → StorageSdkApi.updateWhere
+/// ```
+class UserRepositoryImpl implements UserRepository {
+  final StorageSdkApi _storage;
+
+  UserRepositoryImpl(this._storage);
+
+  // ── DB row → Domain ──────────────────────────────────────────────────────
+
+  User _toEntity(DriftUser row) => User(
+    uid: row.uid,
+    uuid: row.uuid,
+    lastOnline: row.lastOnline,
+    profilePic: row.profilePic,
+    profilePicGaussian: row.profilePicGaussian,
+    nickname: row.nickname,
+    depositName: row.depositName,
+    hasSetDepositName: row.hasSetDepositName,
+    contact: row.contact,
+    countryCode: row.countryCode,
+    username: row.username,
+    role: row.role,
+    relationship: row.relationship,
+    friendStatus: row.friendStatus,
+    bio: row.bio,
+    userAlias: row.userAlias,
+    requestAt: row.requestAt,
+    deletedAt: row.deletedAt,
+    email: row.email,
+    recoveryEmail: row.recoveryEmail,
+    remark: row.remark,
+    source: row.source,
+    addIndex: row.addIndex,
+    incomingSoundId: row.incomingSoundId,
+    outgoingSoundId: row.outgoingSoundId,
+    notificationSoundId: row.notificationSoundId,
+    sendMessageSoundId: row.sendMessageSoundId,
+    groupNotificationSoundId: row.groupNotificationSoundId,
+    groupTags: row.groupTags,
+    friendTags: row.friendTags,
+    publicKey: row.publicKey,
+    configBits: row.configBits,
+    hint: row.hint,
+  );
+
+  // ── Domain → DB companion ────────────────────────────────────────────────
+
+  UsersCompanion _toCompanion(User user) => UsersCompanion(
+    uid: Value(user.uid),
+    uuid: Value(user.uuid),
+    lastOnline: Value(user.lastOnline),
+    profilePic: Value(user.profilePic),
+    profilePicGaussian: Value(user.profilePicGaussian ?? ''),
+    nickname: Value(user.nickname),
+    depositName: Value(user.depositName),
+    hasSetDepositName: Value(user.hasSetDepositName ?? 0),
+    contact: Value(user.contact),
+    countryCode: Value(user.countryCode),
+    username: Value(user.username),
+    role: Value(user.role),
+    relationship: Value(user.relationship),
+    friendStatus: Value(user.friendStatus),
+    bio: Value(user.bio),
+    userAlias: Value(user.userAlias),
+    requestAt: Value(user.requestAt),
+    deletedAt: Value(user.deletedAt),
+    email: Value(user.email),
+    recoveryEmail: Value(user.recoveryEmail),
+    remark: Value(user.remark),
+    source: Value(user.source),
+    addIndex: Value(user.addIndex),
+    incomingSoundId: Value(user.incomingSoundId ?? 0),
+    outgoingSoundId: Value(user.outgoingSoundId ?? 0),
+    notificationSoundId: Value(user.notificationSoundId ?? 0),
+    sendMessageSoundId: Value(user.sendMessageSoundId ?? 0),
+    groupNotificationSoundId: Value(user.groupNotificationSoundId ?? 0),
+    groupTags: Value(user.groupTags ?? '[]'),
+    friendTags: Value(user.friendTags ?? '[]'),
+    publicKey: Value(user.publicKey),
+    configBits: Value(user.configBits ?? 0),
+    hint: Value(user.hint),
+  );
+
+  // ── 监听 ─────────────────────────────────────────────────────────────────
+
+  /// 监听单个用户
+  @override
+  Stream<User?> watchUser(int uid) {
+    return _storage
+        .watchFirst<DriftUser, $UsersTable>((t) => t.uid.equals(uid))
+        .map((row) => row != null ? _toEntity(row) : null);
+  }
+
+  /// 监听指定 uid 列表
+  @override
+  Stream<List<User>> watchUsers(List<int> uids) {
+    return _storage
+        .watchWhere<DriftUser, $UsersTable>((t) => t.uid.isIn(uids))
+        .map((rows) => rows.map(_toEntity).toList());
+  }
+
+  /// 监听所有用户
+  @override
+  Stream<List<User>> watchAllUsers() {
+    return _storage.watchAll<DriftUser>().map(
+      (rows) => rows.map(_toEntity).toList(),
+    );
+  }
+
+  // ── 读取 ─────────────────────────────────────────────────────────────────
+
+  @override
+  Future<User?> getUser(int uid) async {
+    final row = await _storage.selectFirst<DriftUser, $UsersTable>(
+      (t) => t.uid.equals(uid),
+    );
+    return row != null ? _toEntity(row) : null;
+  }
+
+  @override
+  Future<List<User>> getAllUsers() async {
+    final rows = await _storage.selectAll<DriftUser>();
+    return rows.map(_toEntity).toList();
+  }
+
+  @override
+  Future<List<User>> getUsers({required int offset, required int limit}) async {
+    final rows = await _storage.rawQuery(
+      'SELECT * FROM user ORDER BY id LIMIT ? OFFSET ?',
+      [limit, offset],
+    );
+    return rows
+        .map(
+          (row) => User(
+            uid: row.read<int>('uid'),
+            uuid: row.readNullable<String>('uuid'),
+            lastOnline: row.readNullable<int>('last_online'),
+            profilePic: row.readNullable<String>('profile_pic'),
+            profilePicGaussian: row.readNullable<String>(
+              'profile_pic_gaussian',
+            ),
+            nickname: row.readNullable<String>('nickname'),
+            depositName: row.readNullable<String>('deposit_name'),
+            hasSetDepositName: row.readNullable<int>('has_set_deposit_name'),
+            contact: row.readNullable<String>('contact'),
+            countryCode: row.readNullable<String>('country_code'),
+            username: row.readNullable<String>('username'),
+            role: row.readNullable<int>('role'),
+            relationship: row.readNullable<int>('relationship'),
+            friendStatus: row.readNullable<int>('friend_status'),
+            bio: row.readNullable<String>('bio'),
+            userAlias: row.readNullable<String>('user_alias'),
+            requestAt: row.readNullable<int>('request_at'),
+            deletedAt: row.readNullable<int>('deleted_at'),
+            email: row.readNullable<String>('email'),
+            recoveryEmail: row.readNullable<String>('recovery_email'),
+            remark: row.readNullable<String>('remark'),
+            source: row.readNullable<String>('source'),
+            addIndex: row.readNullable<int>('add_index'),
+            incomingSoundId: row.readNullable<int>('incoming_sound_id'),
+            outgoingSoundId: row.readNullable<int>('outgoing_sound_id'),
+            notificationSoundId: row.readNullable<int>('notification_sound_id'),
+            sendMessageSoundId: row.readNullable<int>('send_message_sound_id'),
+            groupNotificationSoundId: row.readNullable<int>(
+              'group_notification_sound_id',
+            ),
+            groupTags: row.readNullable<String>('group_tags'),
+            friendTags: row.readNullable<String>('friend_tags'),
+            publicKey: row.readNullable<String>('public_key'),
+            configBits: row.readNullable<int>('config_bits'),
+            hint: row.readNullable<String>('hint'),
+          ),
+        )
+        .toList();
+  }
+
+  @override
+  Future<int> countUsers() async {
+    return _storage.count<DriftUser, $UsersTable>();
+  }
+
+  // ── 写入 ─────────────────────────────────────────────────────────────────
+
+  @override
+  Future<void> saveUser(User user) async {
+    await _storage.insertOrReplace<DriftUser>(_toCompanion(user));
+  }
+
+  @override
+  Future<void> saveUsers(List<User> users) async {
+    await _storage.batchInsertOrReplace<DriftUser>(
+      users.map(_toCompanion).toList(),
+    );
+  }
+
+  /// 仅更新指定列，其他列不变
+  ///
+  /// 示例：
+  /// ```dart
+  /// await userRepo.updateFields(uid, UsersCompanion(
+  ///   nickname: Value('New Name'),
+  ///   lastOnline: Value(DateTime.now().millisecondsSinceEpoch),
+  /// ));
+  /// ```
+  @override
+  Future<void> updateFields(int uid, UsersCompanion companion) async {
+    await _storage.updateWhere<DriftUser, $UsersTable>(
+      companion,
+      (t) => t.uid.equals(uid),
+    );
+  }
+
+  // ── 删除 ─────────────────────────────────────────────────────────────────
+
+  @override
+  Future<void> deleteUser(int uid) async {
+    await _storage.deleteWhere<DriftUser, $UsersTable>(
+      (t) => t.uid.equals(uid),
+    );
+  }
+}
diff --git a/apps/im_app/lib/domain/entities/user.dart b/apps/im_app/lib/domain/entities/user.dart
index a801c1c..7e29144 100644
--- a/apps/im_app/lib/domain/entities/user.dart
+++ b/apps/im_app/lib/domain/entities/user.dart
@@ -3,13 +3,12 @@
 /// 全局共享实体，被 auth / chat / contact 等多个 Feature 共用。
 /// 纯 Dart 类，零 Flutter / 零网络 / 零 DB 依赖。
 ///
-/// ## 数据流位置
-///
+/// ## 数据流
 /// ```
 /// 服务端 JSON
-///   → LoginData（Response DTO，data/remote/login_request.dart）
-///     → LoginData.toEntity()
-///       → ★ User ★                ← 你在这里
+///   → User.fromJson()               ← 直接从网络创建
+///     → ★ User ★                   ← 你在这里
+///       → userRepo.saveUser(user)   ← 可选持久化
 ///         → ViewModel.state
 ///           → View 渲染
 /// ```
@@ -20,16 +19,32 @@ class User {
   final String? profilePic;
   final String? profilePicGaussian;
   final String? nickname;
+  final String? depositName;
+  final int? hasSetDepositName;
   final String? contact;
   final String? countryCode;
+  final String? username;
+  final int? role;
+  final int? relationship;
+  final int? friendStatus;
+  final String? bio;
+  final String? userAlias;
+  final int? requestAt;
+  final int? deletedAt;
   final String? email;
   final String? recoveryEmail;
-  final String? username;
-  final String? bio;
-  final int? relationship;
-  final String? userAlias;
-  final int? channelId;
-  final int? channelGroupId;
+  final String? remark;
+  final String? source;
+  final int? addIndex;
+  final int? incomingSoundId;
+  final int? outgoingSoundId;
+  final int? notificationSoundId;
+  final int? sendMessageSoundId;
+  final int? groupNotificationSoundId;
+  final String? groupTags;
+  final String? friendTags;
+  final String? publicKey;
+  final int? configBits;
   final String? hint;
 
   const User({
@@ -39,19 +54,73 @@ class User {
     this.profilePic,
     this.profilePicGaussian,
     this.nickname,
+    this.depositName,
+    this.hasSetDepositName,
     this.contact,
     this.countryCode,
+    this.username,
+    this.role,
+    this.relationship,
+    this.friendStatus,
+    this.bio,
+    this.userAlias,
+    this.requestAt,
+    this.deletedAt,
     this.email,
     this.recoveryEmail,
-    this.username,
-    this.bio,
-    this.relationship,
-    this.userAlias,
-    this.channelId,
-    this.channelGroupId,
+    this.remark,
+    this.source,
+    this.addIndex,
+    this.incomingSoundId,
+    this.outgoingSoundId,
+    this.notificationSoundId,
+    this.sendMessageSoundId,
+    this.groupNotificationSoundId,
+    this.groupTags,
+    this.friendTags,
+    this.publicKey,
+    this.configBits,
     this.hint,
   });
 
+  /// 直接从网络 JSON 创建 Domain 实体
+  factory User.fromJson(Map<String, dynamic> json) => User(
+    uid: json['uid'] as int,
+    uuid: json['uuid'],
+    lastOnline: json['last_online'],
+    profilePic: json['profile_pic'],
+    profilePicGaussian: json['profile_pic_gaussian'],
+    nickname: json['nickname'],
+    depositName: json['deposit_name'],
+    hasSetDepositName: json['has_set_deposit_name'],
+    contact: json['contact'],
+    countryCode: json['country_code'],
+    username: json['username'],
+    role: json['role'],
+    relationship: json['relationship'],
+    friendStatus: json['friend_status'],
+    bio: json['bio'],
+    userAlias: json['user_alias'],
+    requestAt: json['request_at'],
+    deletedAt: json['deleted_at'],
+    email: json['email'],
+    recoveryEmail: json['recovery_email'],
+    remark: json['remark'],
+    source: json['source'],
+    addIndex: json['__add_index'],
+    incomingSoundId: json['incoming_sound_id'],
+    outgoingSoundId: json['outgoing_sound_id'],
+    notificationSoundId: json['notification_sound_id'],
+    sendMessageSoundId: json['send_message_sound_id'],
+    groupNotificationSoundId: json['group_notification_sound_id'],
+    groupTags: json['group_tags'],
+    friendTags: json['friend_tags'],
+    publicKey: json['public_key'],
+    configBits: json['config_bits'],
+    hint: json['hint'],
+  );
+
+  /// 仅更新部分字段
   User copyWith({
     int? uid,
     String? uuid,
@@ -59,16 +128,32 @@ class User {
     String? profilePic,
     String? profilePicGaussian,
     String? nickname,
+    String? depositName,
+    int? hasSetDepositName,
     String? contact,
     String? countryCode,
+    String? username,
+    int? role,
+    int? relationship,
+    int? friendStatus,
+    String? bio,
+    String? userAlias,
+    int? requestAt,
+    int? deletedAt,
     String? email,
     String? recoveryEmail,
-    String? username,
-    String? bio,
-    int? relationship,
-    String? userAlias,
-    int? channelId,
-    int? channelGroupId,
+    String? remark,
+    String? source,
+    int? addIndex,
+    int? incomingSoundId,
+    int? outgoingSoundId,
+    int? notificationSoundId,
+    int? sendMessageSoundId,
+    int? groupNotificationSoundId,
+    String? groupTags,
+    String? friendTags,
+    String? publicKey,
+    int? configBits,
     String? hint,
   }) {
     return User(
@@ -78,16 +163,33 @@ class User {
       profilePic: profilePic ?? this.profilePic,
       profilePicGaussian: profilePicGaussian ?? this.profilePicGaussian,
       nickname: nickname ?? this.nickname,
+      depositName: depositName ?? this.depositName,
+      hasSetDepositName: hasSetDepositName ?? this.hasSetDepositName,
       contact: contact ?? this.contact,
       countryCode: countryCode ?? this.countryCode,
+      username: username ?? this.username,
+      role: role ?? this.role,
+      relationship: relationship ?? this.relationship,
+      friendStatus: friendStatus ?? this.friendStatus,
+      bio: bio ?? this.bio,
+      userAlias: userAlias ?? this.userAlias,
+      requestAt: requestAt ?? this.requestAt,
+      deletedAt: deletedAt ?? this.deletedAt,
       email: email ?? this.email,
       recoveryEmail: recoveryEmail ?? this.recoveryEmail,
-      username: username ?? this.username,
-      bio: bio ?? this.bio,
-      relationship: relationship ?? this.relationship,
-      userAlias: userAlias ?? this.userAlias,
-      channelId: channelId ?? this.channelId,
-      channelGroupId: channelGroupId ?? this.channelGroupId,
+      remark: remark ?? this.remark,
+      source: source ?? this.source,
+      addIndex: addIndex ?? this.addIndex,
+      incomingSoundId: incomingSoundId ?? this.incomingSoundId,
+      outgoingSoundId: outgoingSoundId ?? this.outgoingSoundId,
+      notificationSoundId: notificationSoundId ?? this.notificationSoundId,
+      sendMessageSoundId: sendMessageSoundId ?? this.sendMessageSoundId,
+      groupNotificationSoundId:
+          groupNotificationSoundId ?? this.groupNotificationSoundId,
+      groupTags: groupTags ?? this.groupTags,
+      friendTags: friendTags ?? this.friendTags,
+      publicKey: publicKey ?? this.publicKey,
+      configBits: configBits ?? this.configBits,
       hint: hint ?? this.hint,
     );
   }
diff --git a/apps/im_app/lib/domain/repositories/user_repository.dart b/apps/im_app/lib/domain/repositories/user_repository.dart
new file mode 100644
index 0000000..3fa4571
--- /dev/null
+++ b/apps/im_app/lib/domain/repositories/user_repository.dart
@@ -0,0 +1,78 @@
+import 'package:im_app/data/local/drift/app_database.dart';
+import 'package:im_app/domain/entities/user.dart';
+
+/// 用户仓储接口
+///
+/// ## 职责
+/// - StorageSdkApi ↔ Domain User 映射
+/// - CRUD 操作（通过 StorageSdkApi，不直接接触 DB）
+/// - 实时监听（单个 / 多个 / 全部）
+///
+/// ## 数据流
+/// ```
+/// 写入：Domain User → _toCompanion() → StorageSdkApi → DB
+/// 读取：DB row (DriftUser) → _toEntity() → Domain User
+/// 监听：DB 变化 → stream → Domain User → UI
+/// ```
+abstract class UserRepository {
+  // ── 监听 ─────────────────────────────────────────────────────────────────
+
+  /// 监听单个用户，DB 变化自动反映
+  Stream<User?> watchUser(int uid);
+
+  /// 监听指定 uid 列表，任一变化自动反映
+  Stream<List<User>> watchUsers(List<int> uids);
+
+  /// 监听所有用户，任一变化自动反映
+  Stream<List<User>> watchAllUsers();
+
+  // ── 读取 ─────────────────────────────────────────────────────────────────
+
+  /// 从 DB 读取单个用户，不存在返回 null
+  Future<User?> getUser(int uid);
+
+  /// 从 DB 读取所有用户
+  Future<List<User>> getAllUsers();
+
+  /// 分页读取用户
+  ///
+  /// [offset] 起始偏移量
+  /// [limit] 每页数量
+  ///
+  /// 示例：
+  /// ```dart
+  /// // 第一页
+  /// final page1 = await repo.getUsers(offset: 0, limit: 50);
+  /// // 第二页
+  /// final page2 = await repo.getUsers(offset: 50, limit: 50);
+  /// ```
+  Future<List<User>> getUsers({required int offset, required int limit});
+
+  /// 统计 DB 中用户总数
+  Future<int> countUsers();
+
+  // ── 写入 ─────────────────────────────────────────────────────────────────
+
+  /// 保存完整用户（insert or replace）
+  /// 调用方决定是否持久化
+  Future<void> saveUser(User user);
+
+  /// 批量保存用户（insert or replace）
+  Future<void> saveUsers(List<User> users);
+
+  /// 仅更新指定字段，不影响其他列
+  ///
+  /// 示例：
+  /// ```dart
+  /// await repo.updateFields(uid, UsersCompanion(
+  ///   nickname: Value('New Name'),
+  ///   lastOnline: Value(DateTime.now().millisecondsSinceEpoch),
+  /// ));
+  /// ```
+  Future<void> updateFields(int uid, UsersCompanion companion);
+
+  // ── 删除 ─────────────────────────────────────────────────────────────────
+
+  /// 删除指定用户
+  Future<void> deleteUser(int uid);
+}
diff --git a/apps/im_app/lib/domain/usecases/insert_users_use_case.dart b/apps/im_app/lib/domain/usecases/insert_users_use_case.dart
new file mode 100644
index 0000000..7223b1b
--- /dev/null
+++ b/apps/im_app/lib/domain/usecases/insert_users_use_case.dart
@@ -0,0 +1,55 @@
+import 'package:im_app/domain/entities/user.dart';
+import 'package:im_app/domain/repositories/user_repository.dart';
+
+/// 批量插入用户用例
+///
+/// ## 职责
+/// - 封装用户插入的业务规则
+/// - 去重（uid 相同时保留最后一个）
+/// - 分批插入，避免单次写入过大
+///
+/// ## 数据流
+/// ```
+/// ViewModel
+///   → InsertUsersUseCase.execute(users)
+///     → 去重
+///     → UserRepository.saveUsers(chunk)  ← 分批写入
+///     → onProgress(completed, total)     ← 可选进度回调
+///   ← 实际插入数量
+/// ```
+class InsertUsersUseCase {
+  final UserRepository _repo;
+  static const _chunkSize = 200;
+
+  InsertUsersUseCase({required UserRepository userRepository})
+    : _repo = userRepository;
+
+  /// 批量插入用户
+  ///
+  /// [users] 要插入的用户列表
+  /// [onProgress] 可选回调，每批完成后触发
+  ///
+  /// 返回实际插入数量
+  Future<int> execute(
+    List<User> users, {
+    void Function(int completed, int total, List<User> chunk)? onProgress,
+  }) async {
+    if (users.isEmpty) return 0;
+
+    final deduped = {for (final u in users) u.uid: u}.values.toList();
+    final total = deduped.length;
+    int completed = 0;
+
+    while (completed < total) {
+      final end = (completed + _chunkSize).clamp(0, total);
+      final chunk = deduped.sublist(completed, end);
+
+      await _repo.saveUsers(chunk);
+      completed += chunk.length;
+
+      onProgress?.call(completed, total, chunk);
+    }
+
+    return completed;
+  }
+}
diff --git a/apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart b/apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart
index 4386f91..e9a60e9 100644
--- a/apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart
+++ b/apps/im_app/lib/features/chat/presentation/chat_db_test_view_model.dart
@@ -1,83 +1,149 @@
 import 'dart:math';
 
-import 'package:drift/drift.dart';
 import 'package:flutter/material.dart';
-import 'package:im_app/app/di/db_provider.dart';
-import 'package:im_app/data/local/drift/app_database.dart';
+import 'package:im_app/app/di/user_provider.dart';
+import 'package:im_app/domain/entities/user.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
-import 'chat_db_test_state.dart';
-
-export 'chat_db_test_state.dart';
-
 part 'chat_db_test_view_model.g.dart';
 
+class ChatDbTestState {
+  final bool testStarted;
+  final List<User> users;
+  final String currentState;
+  final bool hasMore;
+  final int currentPage;
+  final int totalCount;
+
+  const ChatDbTestState({
+    this.testStarted = false,
+    this.users = const [],
+    this.currentState = '',
+    this.hasMore = true,
+    this.currentPage = 0,
+    this.totalCount = 0,
+  });
+
+  ChatDbTestState copyWith({
+    bool? testStarted,
+    List<User>? users,
+    String? currentState,
+    bool? hasMore,
+    int? currentPage,
+    int? totalCount,
+  }) => ChatDbTestState(
+    testStarted: testStarted ?? this.testStarted,
+    users: users ?? this.users,
+    currentState: currentState ?? this.currentState,
+    hasMore: hasMore ?? this.hasMore,
+    currentPage: currentPage ?? this.currentPage,
+    totalCount: totalCount ?? this.totalCount,
+  );
+}
+
 @riverpod
 class ChatDbTestViewModel extends _$ChatDbTestViewModel {
+  final _random = Random();
+  bool _isTesting = false;
+  static const _pageSize = 50;
+
   @override
   ChatDbTestState build() {
-    // 这里就是 onInit
-    final List<TestResult> testResults = List.generate(
-      1000,
-      (i) => TestResult(
-        title: '用户 ${Random().nextInt(9999)}',
-        subtitle: 'uid: ${Random().nextInt(999999)}',
-        duration: '${Random().nextInt(500)}ms',
-      ),
-    );
-    return ChatDbTestState(testResults: testResults);
+    Future.microtask(() => _loadNextPage(reset: true));
+    return const ChatDbTestState(currentState: '加载中...');
   }
 
-  // ── 操作（Demo 按钮，正式开发后随 UI 一并替换） ──────────────────────────
+  // ── 分页 ──────────────────────────────────────────────────────────────────
 
-  /// 切换测试状态（开始 / 停止）
-  void toggleDBTest() {
-    if (state.testStarted) {
-      state = state.copyWith(testStarted: false, currentState: '结束测试');
-    } else {
-      state = state.copyWith(testStarted: true, currentState: '开始测试');
-      _testDBInsert();
-    }
+  Future<void> _loadNextPage({bool reset = false}) async {
+    if (!state.hasMore && !reset) return;
+
+    final repo = ref.read(userRepositoryProvider);
+    final page = reset ? 0 : state.currentPage;
+    final offset = page * _pageSize;
+
+    final results = await Future.wait([
+      repo.getUsers(offset: offset, limit: _pageSize),
+      repo.countUsers(),
+    ]);
+
+    if (!ref.mounted) return;
+
+    final newUsers = results[0] as List<User>;
+    final total = results[1] as int;
+
+    state = state.copyWith(
+      users: reset ? newUsers : [...state.users, ...newUsers],
+      currentPage: page + 1,
+      hasMore: newUsers.length >= _pageSize,
+      totalCount: total,
+      currentState: reset && newUsers.isEmpty ? '暂无数据' : '空闲 (共 $total 条)',
+    );
+  }
+
+  /// Called by ListView when reaching the end
+  void loadMore() {
+    if (!state.hasMore || state.testStarted) return;
+    _loadNextPage();
+  }
+
+  // ── 测试 ──────────────────────────────────────────────────────────────────
+
+  void startDBTest(BuildContext context) {
+    _isTesting = true;
+    state = state.copyWith(testStarted: true, currentState: '开始测试');
+    _testDBInsert();
+  }
+
+  void stopDBTest(BuildContext context) {
+    _isTesting = false;
+    state = state.copyWith(testStarted: false, currentState: '结束测试');
   }
 
   Future<void> _testDBInsert() async {
-    final db = ref.read(storageSdkProvider);
+    final useCase = ref.read(insertUsersUseCaseProvider);
+    final repo = ref.read(userRepositoryProvider);
     const count = 10000;
-    const chunkSize = 50;
     final stopwatch = Stopwatch()..start();
+    final baseUid = DateTime.now().microsecondsSinceEpoch;
 
-    debugPrint('开始测试: $count 条，每批 $chunkSize 条');
+    debugPrint('开始测试: $count 条');
 
-    int completed = 0;
+    final workingList = List<User>.from(state.users);
 
-    for (var i = 0; i < count; i += chunkSize) {
-      final chunk = List.generate(
-        chunkSize.clamp(0, count - i),
-        (j) =>
-            UsersCompanion.insert(uid: i + j, nickname: Value('User ${i + j}')),
-      );
+    final allUsers = List.generate(
+      count,
+      (i) => User(uid: baseUid + i, nickname: 'User ${_random.nextInt(9999)}'),
+    );
 
-      await db.batchInsertOrReplace<DriftUser>(chunk);
-      completed += chunk.length;
+    await useCase.execute(
+      allUsers,
+      onProgress: (completed, total, chunk) {
+        workingList.addAll(chunk);
 
-      // 让出主线程
-      await Future.delayed(Duration.zero);
+        debugPrint(
+          '已完成: $completed / $total (${stopwatch.elapsedMilliseconds}ms)',
+        );
 
-      debugPrint(
-        '已完成: $completed / $count (${stopwatch.elapsedMilliseconds}ms)',
-      );
+        if (ref.mounted && _isTesting) {
+          state = state.copyWith(
+            users: List.unmodifiable(workingList),
+            currentState: '已插入 $completed / $total 条',
+          );
+        }
+      },
+    );
 
-      // 更新 UI 状态
-      if (ref.mounted) {
-        state = state.copyWith(currentState: '已插入 $completed / $count 条');
-      }
-    }
+    _isTesting = false;
+    final elapsed = stopwatch.elapsedMilliseconds;
+    debugPrint('全部完成: ${elapsed}ms');
 
-    debugPrint('全部完成: ${stopwatch.elapsedMilliseconds}ms');
     if (ref.mounted) {
+      final total = await repo.countUsers();
       state = state.copyWith(
         testStarted: false,
-        currentState: '完成！共 $count 条，耗时 ${stopwatch.elapsedMilliseconds}ms',
+        totalCount: total,
+        currentState: '完成！共 $total 条，耗时 ${elapsed}ms',
       );
     }
   }
diff --git a/apps/im_app/lib/features/chat/usecases/insert_users_use_case.dart b/apps/im_app/lib/features/chat/usecases/insert_users_use_case.dart
new file mode 100644
index 0000000..7223b1b
--- /dev/null
+++ b/apps/im_app/lib/features/chat/usecases/insert_users_use_case.dart
@@ -0,0 +1,55 @@
+import 'package:im_app/domain/entities/user.dart';
+import 'package:im_app/domain/repositories/user_repository.dart';
+
+/// 批量插入用户用例
+///
+/// ## 职责
+/// - 封装用户插入的业务规则
+/// - 去重（uid 相同时保留最后一个）
+/// - 分批插入，避免单次写入过大
+///
+/// ## 数据流
+/// ```
+/// ViewModel
+///   → InsertUsersUseCase.execute(users)
+///     → 去重
+///     → UserRepository.saveUsers(chunk)  ← 分批写入
+///     → onProgress(completed, total)     ← 可选进度回调
+///   ← 实际插入数量
+/// ```
+class InsertUsersUseCase {
+  final UserRepository _repo;
+  static const _chunkSize = 200;
+
+  InsertUsersUseCase({required UserRepository userRepository})
+    : _repo = userRepository;
+
+  /// 批量插入用户
+  ///
+  /// [users] 要插入的用户列表
+  /// [onProgress] 可选回调，每批完成后触发
+  ///
+  /// 返回实际插入数量
+  Future<int> execute(
+    List<User> users, {
+    void Function(int completed, int total, List<User> chunk)? onProgress,
+  }) async {
+    if (users.isEmpty) return 0;
+
+    final deduped = {for (final u in users) u.uid: u}.values.toList();
+    final total = deduped.length;
+    int completed = 0;
+
+    while (completed < total) {
+      final end = (completed + _chunkSize).clamp(0, total);
+      final chunk = deduped.sublist(completed, end);
+
+      await _repo.saveUsers(chunk);
+      completed += chunk.length;
+
+      onProgress?.call(completed, total, chunk);
+    }
+
+    return completed;
+  }
+}
diff --git a/apps/im_app/lib/features/chat/view/chat_db_test_page.dart b/apps/im_app/lib/features/chat/view/chat_db_test_page.dart
index 3c8c025..fe3f90f 100644
--- a/apps/im_app/lib/features/chat/view/chat_db_test_page.dart
+++ b/apps/im_app/lib/features/chat/view/chat_db_test_page.dart
@@ -4,53 +4,89 @@ import 'package:im_app/features/chat/presentation/chat_db_test_view_model.dart';
 
 import '../../../core/ui/components/app_button.dart';
 
-/// 数据库性能测试页（Demo）
-///
-/// 批量插入 10000 条用户记录，验证 Drift 批量写入性能。
-/// 所有操作通过 [ChatDbTestViewModel] 处理，View 只负责渲染。
-/// 正式开发后此页面将被删除。
-class ChatDbTestPage extends ConsumerWidget {
+class ChatDbTestPage extends ConsumerStatefulWidget {
   const ChatDbTestPage({super.key});
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  ConsumerState<ChatDbTestPage> createState() => _ChatDbTestPageState();
+}
+
+class _ChatDbTestPageState extends ConsumerState<ChatDbTestPage> {
+  final _scrollController = ScrollController();
+
+  @override
+  void initState() {
+    super.initState();
+    _scrollController.addListener(_onScroll);
+  }
+
+  @override
+  void dispose() {
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+  void _onScroll() {
+    if (_scrollController.position.pixels >=
+        _scrollController.position.maxScrollExtent - 300) {
+      ref.read(chatDbTestViewModelProvider.notifier).loadMore();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
     final vm = ref.read(chatDbTestViewModelProvider.notifier);
-    final state = ref.watch(chatDbTestViewModelProvider);
+    final testStarted = ref.watch(
+      chatDbTestViewModelProvider.select((s) => s.testStarted),
+    );
+    final currentState = ref.watch(
+      chatDbTestViewModelProvider.select((s) => s.currentState),
+    );
+    final users = ref.watch(chatDbTestViewModelProvider.select((s) => s.users));
+    final hasMore = ref.watch(
+      chatDbTestViewModelProvider.select((s) => s.hasMore),
+    );
+    final totalCount = ref.watch(
+      chatDbTestViewModelProvider.select((s) => s.totalCount),
+    );
 
     return Scaffold(
-      appBar: AppBar(title: const Text('测试数据库')),
+      appBar: AppBar(title: Text('测试数据库 ($totalCount)')),
       body: Column(
         mainAxisSize: MainAxisSize.max,
         spacing: 16,
         children: [
-          SizedBox(height: 4),
+          const SizedBox(height: 4),
           Padding(
-            padding: EdgeInsetsGeometry.symmetric(horizontal: 8),
+            padding: const EdgeInsets.symmetric(horizontal: 8),
             child: Row(
               mainAxisAlignment: MainAxisAlignment.spaceBetween,
               children: [
                 AppButton.inverse(
-                  label: state.buttonLabel,
-                  onPressed: () => vm.toggleDBTest(),
-                ),
-                SizedBox(width: 8),
-                Expanded(
-                  child: Text(state.currentState, textAlign: TextAlign.end),
+                  label: testStarted ? '结束' : '开始',
+                  onPressed: () => testStarted
+                      ? vm.stopDBTest(context)
+                      : vm.startDBTest(context),
                 ),
+                const SizedBox(width: 8),
+                Expanded(child: Text(currentState, textAlign: TextAlign.end)),
               ],
             ),
           ),
           Expanded(
             child: ListView.builder(
-              itemCount: state.testResults.length,
+              controller: _scrollController,
+              itemCount: users.length + (hasMore ? 1 : 0),
+              cacheExtent: 500,
               itemBuilder: (context, index) {
-                final result = state.testResults[index];
-                return ListTile(
-                  titleAlignment: ListTileTitleAlignment.center,
-                  title: Text(result.title),
-                  subtitle: Text(result.subtitle),
-                  // trailing: Text(result.duration),
-                );
+                if (index == users.length) {
+                  return const Padding(
+                    padding: EdgeInsets.all(16),
+                    child: Center(child: CircularProgressIndicator()),
+                  );
+                }
+                final user = users[index];
+                return _UserTile(uid: user.uid, nickname: user.nickname);
               },
             ),
           ),
@@ -59,3 +95,19 @@ class ChatDbTestPage extends ConsumerWidget {
     );
   }
 }
+
+class _UserTile extends StatelessWidget {
+  final int uid;
+  final String? nickname;
+
+  const _UserTile({required this.uid, required this.nickname});
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      titleAlignment: ListTileTitleAlignment.center,
+      title: Text(nickname ?? '-'),
+      subtitle: Text('uid: $uid'),
+    );
+  }
+}
diff --git a/apps/im_app/lib/features/login/presentation/login_view_model.dart b/apps/im_app/lib/features/login/presentation/login_view_model.dart
index 2cf2b45..3ae37a0 100644
--- a/apps/im_app/lib/features/login/presentation/login_view_model.dart
+++ b/apps/im_app/lib/features/login/presentation/login_view_model.dart
@@ -2,7 +2,7 @@ import 'dart:convert';
 
 import 'package:flutter/services.dart';
 import 'package:im_app/app/di/db_provider.dart';
-import 'package:im_app/data/models/user_dto.dart';
+import 'package:im_app/app/di/user_provider.dart';
 import 'package:im_app/domain/entities/user.dart';
 import 'package:networks_sdk/networks_sdk.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
@@ -62,11 +62,12 @@ class LoginViewModel extends _$LoginViewModel {
     // 防止连点重入：第一次调用未完成前忽略后续调用
     if (state.isLoading) return;
     state = state.copyWith(isLoading: true, error: null);
+    final storageApi = ref.read(storageSdkProvider);
+    final storageLifeCycle = storageApi as StorageSdkLifecycle;
+    final repositoryProvider = ref.read(userRepositoryProvider);
+    final provider = ref.read(authNotifierProvider);
 
     try {
-      final storageApi = ref.read(storageSdkProvider);
-      final storageLifeCycle = storageApi as StorageSdkLifecycle;
-
       // 读取 mock 数据（loginData.json 结构: { code, message, data: {...} }）
       // 手动拆包 data 字段，对应 SDK 内部 ApiResponseWrapper 的行为
       final raw = await rootBundle.loadString('assets/loginData.json');
@@ -90,23 +91,18 @@ class LoginViewModel extends _$LoginViewModel {
         bio: profile['bio'] as String,
         relationship: profile['relationship'] as int,
         userAlias: profile['user_alias'] as String?,
-        channelId: profile['channel_id'] as int,
-        channelGroupId: profile['channel_group_id'] as int,
         hint: profile['hint'] as String,
       );
 
       // 先完成 DB 操作，再标记登录状态（失败时不会误标为已登录）
       await storageLifeCycle.openDatabase(user.uid);
-      final userCompanion = UserDto.fromEntity(user).toCompanion();
-      await storageApi.insertOrReplace(userCompanion);
+      // Save user to DB via repository
+      await repositoryProvider.saveUser(user);
 
-      // 全部成功后再更新登录状态，触发路由守卫重定向
-      // 注意：login() 触发导航后 provider 随即被 dispose，之后不能再写 state
-      if (!ref.mounted) return;
-      ref.read(authNotifierProvider).login();
+      // Trigger auth state
+      provider.login();
     } catch (e) {
       // 导航已发生时 provider 已被 dispose，静默丢弃，不再写 state
-      if (!ref.mounted) return;
       state = state.copyWith(error: e.toString(), isLoading: false);
     }
   }
@@ -118,25 +114,19 @@ class LoginViewModel extends _$LoginViewModel {
   /// 3. 成功：写入 user；失败：写入 error
   Future<void> login(String email, String password) async {
     state = state.copyWith(isLoading: true, error: null);
+    final provider = ref.read(loginUseCaseProvider);
 
     try {
-      final user = await ref
-          .read(loginUseCaseProvider)
-          .execute(email: email, password: password);
-
-      if (!ref.mounted) return;
+      final user = await provider.execute(email: email, password: password);
       state = state.copyWith(user: user, isLoading: false);
     } on FormatException catch (e) {
       // 格式校验失败（UseCase 层抛出）
-      if (!ref.mounted) return;
       state = state.copyWith(error: e.message, isLoading: false);
     } on ApiError catch (e) {
       // 网络 / 服务端错误（Repository → SDK 透传）
-      if (!ref.mounted) return;
       state = state.copyWith(error: e.displayMessage, isLoading: false);
     } catch (e) {
       // 兜底：防止未预期的异常导致 isLoading 死锁
-      if (!ref.mounted) return;
       state = state.copyWith(error: e.toString(), isLoading: false);
     }
   }