diff --git a/lib/features/authentication/bloc/authentication_bloc.dart b/lib/features/authentication/bloc/authentication_bloc.dart
index fd7855cc..8514a5f8 100644
--- a/lib/features/authentication/bloc/authentication_bloc.dart
+++ b/lib/features/authentication/bloc/authentication_bloc.dart
@@ -10,16 +10,22 @@ import 'package:tsdm_client/utils/debug.dart';
 part 'authentication_event.dart';
 part 'authentication_state.dart';
 
+/// Emitter
 typedef AuthenticationEmitter = Emitter<AuthenticationState>;
 
+/// Bloc the authentication, including login and logout.
+///
+/// This bloc should be used as a global long-live bloc.
 class AuthenticationBloc
     extends Bloc<AuthenticationEvent, AuthenticationState> {
-  AuthenticationBloc(
-      {required AuthenticationRepository authenticationRepository})
-      : _authenticationRepository = authenticationRepository,
+  /// Constructor
+  AuthenticationBloc({
+    required AuthenticationRepository authenticationRepository,
+  })  : _authenticationRepository = authenticationRepository,
         super(const AuthenticationState()) {
     on<AuthenticationFetchLoginHashRequested>(
-        _onAuthenticationFetchLoginHashRequested);
+      _onAuthenticationFetchLoginHashRequested,
+    );
     on<AuthenticationLoginRequested>(_onAuthenticationLoginRequested);
   }
 
@@ -32,15 +38,23 @@ class AuthenticationBloc
     emit(state.copyWith(status: AuthenticationStatus.fetchingHash));
     try {
       final loginHash = await _authenticationRepository.fetchHash();
-      emit(state.copyWith(
-          status: AuthenticationStatus.gotHash, loginHash: loginHash));
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.gotHash,
+          loginHash: loginHash,
+        ),
+      );
     } on HttpRequestFailedException catch (e) {
       debug('failed to fetch login hash: $e');
       emit(state.copyWith(status: AuthenticationStatus.failed));
     } on LoginException catch (e) {
       debug('failed to fetch login hash: $e');
-      emit(state.copyWith(
-          status: AuthenticationStatus.failed, loginException: e));
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.failed,
+          loginException: e,
+        ),
+      );
     }
   }
 
@@ -57,8 +71,12 @@ class AuthenticationBloc
       emit(state.copyWith(status: AuthenticationStatus.failed));
     } on LoginException catch (e) {
       debug('failed to login: $e');
-      emit(state.copyWith(
-          status: AuthenticationStatus.failed, loginException: e));
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.failed,
+          loginException: e,
+        ),
+      );
     }
   }
 }
diff --git a/lib/features/authentication/bloc/authentication_event.dart b/lib/features/authentication/bloc/authentication_event.dart
index 735d3eed..aa3ea1e0 100644
--- a/lib/features/authentication/bloc/authentication_event.dart
+++ b/lib/features/authentication/bloc/authentication_event.dart
@@ -1,5 +1,6 @@
 part of 'authentication_bloc.dart';
 
+/// Event of authentication.
 sealed class AuthenticationEvent extends Equatable {
   const AuthenticationEvent();
 
@@ -10,7 +11,11 @@ sealed class AuthenticationEvent extends Equatable {
 /// Call this event to fetch hash data required in login process before login.
 final class AuthenticationFetchLoginHashRequested extends AuthenticationEvent {}
 
+/// User request to login with user credential.
 final class AuthenticationLoginRequested extends AuthenticationEvent {
+  /// Constructor.
   const AuthenticationLoginRequested(this.userCredential) : super();
+
+  /// User credential.
   final UserCredential userCredential;
 }
diff --git a/lib/features/authentication/bloc/authentication_state.dart b/lib/features/authentication/bloc/authentication_state.dart
index df444394..6cf46eff 100644
--- a/lib/features/authentication/bloc/authentication_state.dart
+++ b/lib/features/authentication/bloc/authentication_state.dart
@@ -1,12 +1,14 @@
 part of 'authentication_bloc.dart';
 
+/// Status of authentication.
 enum AuthenticationStatus {
+  /// Initial state
   initial,
 
   /// Fetching hash data that need to use in login process.
   fetchingHash,
 
-  //
+  /// After got the form hash.
   gotHash,
 
   /// Polling login request.
@@ -19,19 +21,29 @@ enum AuthenticationStatus {
   failed,
 }
 
+/// State of authentication.
+///
+/// Carrying all current logged user info and login status.
 final class AuthenticationState extends Equatable {
+  /// Constructor.
   const AuthenticationState({
     this.status = AuthenticationStatus.initial,
     this.loginHash,
     this.loginException,
   });
 
+  /// Status of authentication.
   final AuthenticationStatus status;
 
+  /// The login hash used to login.
+  ///
+  /// Useless unless is going to login.
   final LoginHash? loginHash;
 
+  /// Exception happened in login.
   final LoginException? loginException;
 
+  /// Copy with.
   AuthenticationState copyWith({
     AuthenticationStatus? status,
     LoginHash? loginHash,
diff --git a/lib/features/authentication/repository/authentication_repository.dart b/lib/features/authentication/repository/authentication_repository.dart
index f124b5e5..9b06c48d 100644
--- a/lib/features/authentication/repository/authentication_repository.dart
+++ b/lib/features/authentication/repository/authentication_repository.dart
@@ -38,8 +38,15 @@ import 'package:universal_html/parsing.dart';
 
 /// Status of authentication.
 enum AuthenticationStatus {
+  /// Unknown state.
+  ///
+  /// Same with [unauthenticated].
   unknown,
+
+  /// Have user logged.
   authenticated,
+
+  /// No one logged.
   unauthenticated,
 }
 
@@ -49,6 +56,7 @@ enum AuthenticationStatus {
 ///
 /// **Need to call dispose.**
 class AuthenticationRepository {
+  /// Constructor.
   AuthenticationRepository({User? user}) : _authedUser = user;
 
   static const _checkAuthUrl = '$baseUrl/home.php?mod=spacecp';
@@ -74,10 +82,13 @@ class AuthenticationRepository {
 
   User? _authedUser;
 
+  /// The current logged user.
   User? get currentUser => _authedUser;
 
+  /// Authentication status stream.
   Stream<AuthenticationStatus> get status => _controller.asBroadcastStream();
 
+  /// Dispose the resources.
   void dispose() {
     _controller.close();
   }
@@ -88,7 +99,8 @@ class AuthenticationRepository {
   ///
   /// * **HttpRequestFailedException** when http request failed.
   /// * **LoginFormHashNotFoundException** when form hash not found.
-  /// * **LoginInvalidFormHashException** when form hash found but not in the expected format.
+  /// * **LoginInvalidFormHashException** when form hash found but not in the
+  ///   expected format.
   Future<LoginHash> fetchHash() async {
     // TODO: Parse CDATA.
     // 返回的data是xml：
@@ -120,10 +132,6 @@ class AuthenticationRepository {
     return LoginHash(formHash: formHash, loginHash: loginHash);
   }
 
-  Future<void> loginWithCookie(Map<String, dynamic> cookieMap) async {
-    throw UnimplementedError();
-  }
-
   /// Login with password and other parameters in [credential].
   ///
   /// Will not change authentication status if failed to login.
diff --git a/lib/features/authentication/repository/exceptions/exceptions.dart b/lib/features/authentication/repository/exceptions/exceptions.dart
index 7e114d5a..5b02b5ad 100644
--- a/lib/features/authentication/repository/exceptions/exceptions.dart
+++ b/lib/features/authentication/repository/exceptions/exceptions.dart
@@ -1,30 +1,53 @@
+/// Basic exception class of login
 sealed class LoginException implements Exception {}
 
+/// The form hash used in login progress is not found.
 final class LoginFormHashNotFoundException implements LoginException {}
 
 /// Found form hash, but it's not in the expect format.
 final class LoginInvalidFormHashException implements LoginException {}
 
+/// The login result message of login progress is not found.
+///
+/// Indicating that we do not know whether we logged in successful or not.
 final class LoginMessageNotFoundException implements LoginException {}
 
+/// The captcha user texted is incorrect.
 final class LoginIncorrectCaptchaException implements LoginException {}
 
+/// Incorrect password or account.
 final class LoginInvalidCredentialException implements LoginException {}
 
+/// Security question or its answer is incorrect.
 final class LoginIncorrectSecurityQuestionException implements LoginException {}
 
+/// Reached the limit of login attempt.
+///
+/// Maybe locked in 20 minutes.
 final class LoginAttemptLimitException implements LoginException {}
 
+/// User info not found when try to login after login seems success.
+///
+/// Now we should update the logged user info but this exception means we can
+/// not found the logged user info.
 final class LoginUserInfoNotFoundException implements LoginException {}
 
+/// Some other exception that not recognized.
 final class LoginOtherErrorException implements LoginException {
+  /// Constructor.
   LoginOtherErrorException(this.message);
 
+  /// Message to describe the error.
   final String message;
 }
 
+/// Basic exception class of logout.
 sealed class LogoutException implements Exception {}
 
+/// The form hash used to logout is not found.
 final class LogoutFormHashNotFoundException implements LogoutException {}
 
+/// Failed to logout.
+///
+/// Nearly impossible to happen.
 final class LogoutFailedException implements LogoutException {}
diff --git a/lib/features/authentication/repository/internal/login_result.dart b/lib/features/authentication/repository/internal/login_result.dart
index fee3e0be..8a112ad8 100644
--- a/lib/features/authentication/repository/internal/login_result.dart
+++ b/lib/features/authentication/repository/internal/login_result.dart
@@ -51,7 +51,8 @@ enum LoginResult {
         return LoginResult.success;
       }
 
-      // Impossible unless server response page updated and changed these messages.
+      // Impossible unless server response page updated and changed these
+      // messages.
       debug(
         'login result check passed but message check maybe outdated: $message',
       );
@@ -65,7 +66,8 @@ enum LoginResult {
 
       // Other unrecognized error.
       debug(
-        'login result check not passed: alert_info class with unknown message: $message',
+        'login result check not passed: '
+        'alert_info class with unknown message: $message',
       );
       return LoginResult.otherError;
     }
@@ -85,7 +87,8 @@ enum LoginResult {
 
       // Other unrecognized error.
       debug(
-        'login result check not passed: alert_error with unknown message: $message',
+        'login result check not passed: '
+        'alert_error with unknown message: $message',
       );
       return LoginResult.otherError;
     }
diff --git a/lib/features/authentication/repository/internal/user_info.dart b/lib/features/authentication/repository/internal/user_info.dart
index af44c303..a29c25e8 100644
--- a/lib/features/authentication/repository/internal/user_info.dart
+++ b/lib/features/authentication/repository/internal/user_info.dart
@@ -1,8 +1,12 @@
 /// User info used in repo.
 class UserInfo {
+  /// Constructor.
   const UserInfo({required this.uid, required this.username});
 
+  /// User id.
   final String uid;
+
+  /// User name.
   final String username;
 
   @override
diff --git a/lib/features/authentication/repository/models/hash.dart b/lib/features/authentication/repository/models/hash.dart
index 535272f4..b2f878b0 100644
--- a/lib/features/authentication/repository/models/hash.dart
+++ b/lib/features/authentication/repository/models/hash.dart
@@ -1,12 +1,19 @@
 import 'package:equatable/equatable.dart';
 
+/// A group of login hash used in login or logout progress.
 class LoginHash extends Equatable {
+  /// Constructor.
   const LoginHash({
     required this.formHash,
     required this.loginHash,
   });
 
+  /// Form hash.
   final String formHash;
+
+  /// Login hash.
+  ///
+  /// Seems not used.
   final String loginHash;
 
   @override
diff --git a/lib/features/authentication/repository/models/user.dart b/lib/features/authentication/repository/models/user.dart
index 85493d9a..5d02ff5f 100644
--- a/lib/features/authentication/repository/models/user.dart
+++ b/lib/features/authentication/repository/models/user.dart
@@ -1,7 +1,15 @@
 import 'package:equatable/equatable.dart';
 
 /// Authenticated user.
+///
+/// [username], [uid] and [email] should have the same priority in identifying
+/// the user.
+///
+/// * Though we may not know the all info above when trying to login.
+/// * All the info above MUST be provided before save logged info info local
+///   storage.
 class User extends Equatable {
+  /// Constructor.
   const User({
     this.username,
     this.uid,
@@ -9,9 +17,18 @@ class User extends Equatable {
     this.email,
   });
 
+  /// Username.
   final String? username;
+
+  /// Uid.
   final String? uid;
+
+  /// Password.
+  ///
+  /// Never save this to local store.
   final String? password;
+
+  /// Email address.
   final String? email;
 
   @override
diff --git a/lib/features/authentication/repository/models/user_credential.dart b/lib/features/authentication/repository/models/user_credential.dart
index 64dce829..9beb9998 100644
--- a/lib/features/authentication/repository/models/user_credential.dart
+++ b/lib/features/authentication/repository/models/user_credential.dart
@@ -2,8 +2,13 @@ import 'package:tsdm_client/constants/url.dart';
 
 /// User name field type, pair with password.
 enum LoginField {
+  /// Username
   username,
+
+  /// Email address.
   email,
+
+  /// Uid
   uid;
 
   @override
@@ -18,17 +23,22 @@ enum LoginField {
 
 /// Additional security question.
 class SecurityQuestion {
+  /// Constructor.
   const SecurityQuestion({
     required this.questionId,
     required this.answer,
   });
 
+  /// The question id of security question chose by user.
   final String questionId;
+
+  /// The answer text that user texted.
   final String answer;
 }
 
 /// Login credential.
 class UserCredential {
+  /// Constructor.
   const UserCredential({
     required this.loginField,
     required this.loginFieldValue,
@@ -76,6 +86,7 @@ class UserCredential {
   /// Can be null.
   final SecurityQuestion? securityQuestion;
 
+  /// Method to convert to json.
   Map<String, dynamic> toJson() {
     final m = {
       'loginfield': loginField.toString(),
diff --git a/lib/features/authentication/view/login_page.dart b/lib/features/authentication/view/login_page.dart
index 62bb847b..ad19256d 100644
--- a/lib/features/authentication/view/login_page.dart
+++ b/lib/features/authentication/view/login_page.dart
@@ -6,9 +6,12 @@ import 'package:tsdm_client/features/authentication/repository/exceptions/except
 import 'package:tsdm_client/features/authentication/widgets/login_form.dart';
 import 'package:tsdm_client/generated/i18n/strings.g.dart';
 
+/// Page of user to login.
 class LoginPage extends StatefulWidget {
+  /// Constructor.
   const LoginPage({this.redirectBackState, super.key});
 
+  /// The redirect back route that navigator will push when logged in succeed.
   final GoRouterState? redirectBackState;
 
   @override
@@ -24,8 +27,8 @@ class _LoginPageState extends State<LoginPage> {
       ),
       body: BlocProvider(
         create: (context) => AuthenticationBloc(
-            authenticationRepository: RepositoryProvider.of(context))
-          ..add(AuthenticationFetchLoginHashRequested()),
+          authenticationRepository: RepositoryProvider.of(context),
+        )..add(AuthenticationFetchLoginHashRequested()),
         child: BlocListener<AuthenticationBloc, AuthenticationState>(
           listener: (context, state) {
             if (state.status == AuthenticationStatus.failed) {
diff --git a/lib/features/authentication/widgets/captcha_image.dart b/lib/features/authentication/widgets/captcha_image.dart
index c3bb3434..4e80847f 100644
--- a/lib/features/authentication/widgets/captcha_image.dart
+++ b/lib/features/authentication/widgets/captcha_image.dart
@@ -15,7 +15,9 @@ const _captchaImageHeight = 150;
 /// So indicator should use (150 / 60) * 320 width.
 const _indicatorBoxWidth = (60 / _captchaImageHeight) * _captchaImageWidth;
 
+/// The captcha image used in login form.
 class CaptchaImage extends StatefulWidget {
+  /// Constructor.
   const CaptchaImage({super.key});
 
   static final Uri _fakeFormVerifyUri =
@@ -78,10 +80,11 @@ class _VerityImageState extends State<CaptchaImage> {
             return Image.memory(bytes, height: 60);
           }
           return const SizedBox(
-              width: _indicatorBoxWidth,
-              child: Center(
-                child: CircularProgressIndicator(),
-              ));
+            width: _indicatorBoxWidth,
+            child: Center(
+              child: CircularProgressIndicator(),
+            ),
+          );
         },
       ),
     );
diff --git a/lib/features/authentication/widgets/login_form.dart b/lib/features/authentication/widgets/login_form.dart
index 28641331..cf95bbf3 100644
--- a/lib/features/authentication/widgets/login_form.dart
+++ b/lib/features/authentication/widgets/login_form.dart
@@ -18,10 +18,12 @@ final _loginQuestions = [
   '您其中一位老师的名字',
   '您个人计算机的型号',
   '您最喜欢的餐馆名称',
-  '驾驶执照的最后四位数字'
+  '驾驶执照的最后四位数字',
 ];
 
+/// Form for user to fill login info.
 class LoginForm extends StatefulWidget {
+  /// Constructor.
   const LoginForm({
     this.redirectPath,
     this.redirectPathParameters,
@@ -29,8 +31,13 @@ class LoginForm extends StatefulWidget {
     super.key,
   });
 
+  /// The url path to redirect back once login succeed.
   final String? redirectPath;
+
+  /// The path parameters of url to redirect back.
   final Map<String, String>? redirectPathParameters;
+
+  /// The extra object of url to redirect back.
   final Object? redirectExtra;
 
   @override
@@ -212,7 +219,9 @@ class _LoginFormState extends State<LoginForm> {
             Navigator.of(context).pop();
           } else {
             debug(
-              'login success, redirect back to: path=${widget.redirectPath} with parameters=${widget.redirectPathParameters}, extra=${widget.redirectExtra}',
+              'login success, redirect back to: path=${widget.redirectPath} '
+              'with parameters=${widget.redirectPathParameters}, '
+              'extra=${widget.redirectExtra}',
             );
             context.pushReplacementNamed(
               widget.redirectPath!,
diff --git a/lib/features/forum/bloc/forum_bloc.dart b/lib/features/forum/bloc/forum_bloc.dart
index 294fb3f4..cf513246 100644
--- a/lib/features/forum/bloc/forum_bloc.dart
+++ b/lib/features/forum/bloc/forum_bloc.dart
@@ -12,16 +12,17 @@ import 'package:universal_html/html.dart' as uh;
 part 'forum_event.dart';
 part 'forum_state.dart';
 
+/// Emitter
 typedef ForumEmitter = Emitter<ForumState>;
 
 /// Bloc of forum page.
 class ForumBloc extends Bloc<ForumEvent, ForumState> {
+  /// Constructor.
   ForumBloc({
     required String fid,
     required ForumRepository forumRepository,
   })  : _forumRepository = forumRepository,
         super(ForumState(fid: fid)) {
-    //
     on<ForumLoadMoreRequested>(_onForumLoadMoreRequested);
     on<ForumRefreshRequested>(_onForumRefreshRequested);
     on<ForumJumpPageRequested>(_onForumJumpPageRequested);
@@ -40,8 +41,8 @@ class ForumBloc extends Bloc<ForumEvent, ForumState> {
       );
       emit(await _parseFromDocument(document, event.pageNumber));
     } on HttpRequestFailedException catch (e) {
-      debug(
-          'failed to load forum page: fid=${state.fid}, pageNumber=${event.pageNumber}: $e');
+      debug('failed to load forum page: fid=${state.fid}, '
+          'pageNumber=${event.pageNumber}: $e');
       emit(state.copyWith(status: ForumStatus.failed));
     }
   }
@@ -52,10 +53,11 @@ class ForumBloc extends Bloc<ForumEvent, ForumState> {
   ) async {
     emit(
       state.copyWith(
-          status: ForumStatus.loading,
-          stickThreadList: [],
-          normalThreadList: [],
-          subredditList: []),
+        status: ForumStatus.loading,
+        stickThreadList: [],
+        normalThreadList: [],
+        subredditList: [],
+      ),
     );
 
     try {
@@ -95,13 +97,20 @@ class ForumBloc extends Bloc<ForumEvent, ForumState> {
     List<StickThread>? stickThreadList;
     List<Forum>? subredditList;
     final normalThreadList = _buildThreadList<NormalThread>(
-        document, 'tsdm_normalthread', NormalThread.fromTBody);
+      document,
+      'tsdm_normalthread',
+      NormalThread.fromTBody,
+    );
 
-    // When jump to other pages, pinned thread and subreddits should be reserved in state.
+    // When jump to other pages, pinned thread and subreddits should be
+    // reserved in state.
     // Only the first page has pinned threads and subreddits.
     if (pageNumber == 1) {
       stickThreadList = _buildThreadList<StickThread>(
-          document, 'tsdm_stickthread', StickThread.fromTBody);
+        document,
+        'tsdm_stickthread',
+        StickThread.fromTBody,
+      );
       subredditList = _buildForumList(document, state.fid);
     }
 
diff --git a/lib/features/forum/bloc/forum_event.dart b/lib/features/forum/bloc/forum_event.dart
index d2897bd7..b1d7e0db 100644
--- a/lib/features/forum/bloc/forum_event.dart
+++ b/lib/features/forum/bloc/forum_event.dart
@@ -1,5 +1,6 @@
 part of 'forum_bloc.dart';
 
+/// Forum event.
 sealed class ForumEvent extends Equatable {
   const ForumEvent();
 
@@ -7,17 +8,23 @@ sealed class ForumEvent extends Equatable {
   List<Object?> get props => [];
 }
 
+/// User request to refresh the forum page.
 final class ForumRefreshRequested extends ForumEvent {}
 
 /// User requested to load page [pageNumber].
 final class ForumLoadMoreRequested extends ForumEvent {
+  /// Constructor.
   const ForumLoadMoreRequested(this.pageNumber) : super();
 
+  /// Page number to load.
   final int pageNumber;
 }
 
 /// User request to jump to another page.
 final class ForumJumpPageRequested extends ForumEvent {
+  /// Constructor.
   const ForumJumpPageRequested(this.pageNumber) : super();
+
+  /// Page number to jump to.
   final int pageNumber;
 }
diff --git a/lib/features/forum/bloc/forum_state.dart b/lib/features/forum/bloc/forum_state.dart
index 0f17a74e..a8d7e9fb 100644
--- a/lib/features/forum/bloc/forum_state.dart
+++ b/lib/features/forum/bloc/forum_state.dart
@@ -2,14 +2,22 @@ part of 'forum_bloc.dart';
 
 /// Page status.
 enum ForumStatus {
+  /// Initial.
   initial,
+
+  /// Loading.
   loading,
+
+  /// Load succeed.
   success,
+
+  /// Failed to load.
   failed,
 }
 
 /// State of forum page of the app.
 class ForumState extends Equatable {
+  /// Constructor.
   const ForumState({
     required this.fid,
     this.title,
@@ -40,9 +48,11 @@ class ForumState extends Equatable {
 
   /// Pinned thread in this forum.
   ///
-  /// Only load in the first page and never update because other numbers of pages do not have pinned threads at all.
+  /// Only load in the first page and never update because other numbers of
+  /// pages do not have pinned threads at all.
   final List<StickThread> stickThreadList;
 
+  /// All normal thread list.
   final List<NormalThread> normalThreadList;
 
   /// All subreddits in this forum.
@@ -56,11 +66,13 @@ class ForumState extends Equatable {
   /// Current pageNumber
   final int currentPage;
 
+  /// How many pages in this forum
   final int totalPages;
 
   /// Flag indicating current user has permission to see this page or not.
   ///
-  /// Only works with logged user. If no user logged in, use [needLogin] flag instead.
+  /// Only works with logged user. If no user logged in, use [needLogin] flag
+  /// instead.
   final bool havePermission;
 
   /// Message showed from server when have no permission.
@@ -71,6 +83,7 @@ class ForumState extends Equatable {
   /// Only works when no user logged.
   final bool needLogin;
 
+  /// Copy with
   ForumState copyWith({
     ForumStatus? status,
     String? fid,
diff --git a/lib/features/forum/view/forum_page.dart b/lib/features/forum/view/forum_page.dart
index 6db2f68b..676ec427 100644
--- a/lib/features/forum/view/forum_page.dart
+++ b/lib/features/forum/view/forum_page.dart
@@ -27,12 +27,16 @@ const _pinnedTabIndex = 0;
 const _threadTabIndex = 1;
 const _subredditTabIndex = 2;
 
+/// Page to show all forum status.
 class ForumPage extends StatefulWidget {
+  /// Constructor.
   const ForumPage({required this.fid, this.title, super.key})
       : forumUrl = '$baseUrl/forum.php?mod=forumdisplay&fid=$fid';
 
   /// Forum ID.
   final String fid;
+
+  /// Forum title.
   final String? title;
 
   /// The url is used to provide features like "open in external browser".
@@ -188,7 +192,8 @@ class _ForumPageState extends State<ForumPage>
     } else if (!state.havePermission) {
       if (state.permissionDeniedMessage != null) {
         return Center(
-            child: munchElement(context, state.permissionDeniedMessage!));
+          child: munchElement(context, state.permissionDeniedMessage!),
+        );
       } else {
         return Center(child: Text(context.t.general.noPermission));
       }
@@ -348,15 +353,18 @@ class _ForumPageState extends State<ForumPage>
                       )
                     : null,
                 onSearch: () async {
-                  await context.pushNamed(ScreenPaths.search,
-                      queryParameters: {'fid': widget.fid});
+                  await context.pushNamed(
+                    ScreenPaths.search,
+                    queryParameters: {'fid': widget.fid},
+                  );
                 },
                 onJumpPage: (pageNumber) async {
                   if (!mounted) {
                     return;
                   }
                   // Mark loading here.
-                  // Mark state will be removed when loading finishes (next build).
+                  // Mark state will be removed when
+                  // loading finishes (next build).
                   context.read<JumpPageCubit>().markLoading();
                   context
                       .read<ForumBloc>()
@@ -388,14 +396,18 @@ class _ForumPageState extends State<ForumPage>
                       if (!context.mounted) {
                         return;
                       }
-                      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
-                        content: Text(
-                          context.t.aboutPage.copiedToClipboard,
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(
+                          content: Text(
+                            context.t.aboutPage.copiedToClipboard,
+                          ),
                         ),
-                      ));
+                      );
                     case MenuActions.openInBrowser:
-                      await context.dispatchAsUrl(widget.forumUrl,
-                          external: true);
+                      await context.dispatchAsUrl(
+                        widget.forumUrl,
+                        external: true,
+                      );
                     case MenuActions.backToTop:
                       await _threadScrollController.animateTo(
                         0,
diff --git a/lib/features/home/cubit/home_cubit.dart b/lib/features/home/cubit/home_cubit.dart
index fae3a39e..31b25849 100644
--- a/lib/features/home/cubit/home_cubit.dart
+++ b/lib/features/home/cubit/home_cubit.dart
@@ -10,6 +10,7 @@ part 'home_state.dart';
 ///
 /// Not the home tab nor the homepage of website.
 class HomeCubit extends Cubit<HomeState> {
+  /// Constructor.
   HomeCubit() : super(const HomeState());
 
   /// Change the current home page state.
diff --git a/lib/features/home/cubit/home_state.dart b/lib/features/home/cubit/home_state.dart
index 6c2b176b..28b50cab 100644
--- a/lib/features/home/cubit/home_state.dart
+++ b/lib/features/home/cubit/home_state.dart
@@ -25,6 +25,7 @@ enum HomeTab {
 
 /// State of the homepage of the app.
 final class HomeState extends Equatable {
+  /// Constructor.
   const HomeState({this.tab = HomeTab.home});
 
   /// Current tab.
@@ -34,8 +35,10 @@ final class HomeState extends Equatable {
   List<Object?> get props => [tab];
 }
 
+/// Bar item in app navigator.
 class NavigationBarItem {
-  NavigationBarItem({
+  /// Constructor.
+  const NavigationBarItem({
     required this.icon,
     required this.selectedIcon,
     required this.label,
@@ -43,13 +46,27 @@ class NavigationBarItem {
     required this.tab,
   });
 
+  /// Item icon.
+  ///
+  /// Use outline style icons.
   final Icon icon;
+
+  /// Item icon when selected.
+  ///
+  /// Use normal style icons.
   final Icon selectedIcon;
+
+  /// Name of the item.
   final String label;
+
+  /// Screen path of the item.
   final String targetPath;
+
+  /// Tab index.
   final HomeTab tab;
 }
 
+/// All navigation bar items.
 final barItems = [
   NavigationBarItem(
     icon: const Icon(Icons.home_outlined),
diff --git a/lib/features/home/view/home_page.dart b/lib/features/home/view/home_page.dart
index 469f6a2c..7b427735 100644
--- a/lib/features/home/view/home_page.dart
+++ b/lib/features/home/view/home_page.dart
@@ -7,6 +7,7 @@ import 'package:tsdm_client/shared/repositories/forum_home_repository/forum_home
 
 /// Page of the homepage of the app.
 class HomePage extends StatelessWidget {
+  /// Constructor.
   const HomePage({
     required ForumHomeRepository forumHomeRepository,
     required this.showNavigationBar,
@@ -14,8 +15,12 @@ class HomePage extends StatelessWidget {
     super.key,
   }) : _forumHomeRepository = forumHomeRepository;
 
+  /// Control to show the app level navigation bar or not.
+  ///
+  /// Only show in top pages.
   final bool showNavigationBar;
 
+  /// Child widget, or call it the body widget.
   final Widget child;
 
   final ForumHomeRepository _forumHomeRepository;
@@ -27,13 +32,15 @@ class HomePage extends StatelessWidget {
       create: (_) => HomeCubit(),
       child: RepositoryProvider.value(
         value: _forumHomeRepository,
-        child: Builder(builder: (context) {
-          return Scaffold(
-            body: child,
-            bottomNavigationBar:
-                showNavigationBar ? const HomeNavigationBar() : null,
-          );
-        }),
+        child: Builder(
+          builder: (context) {
+            return Scaffold(
+              body: child,
+              bottomNavigationBar:
+                  showNavigationBar ? const HomeNavigationBar() : null,
+            );
+          },
+        ),
       ),
     );
   }
diff --git a/lib/features/home/widgets/home_navigation_bar.dart b/lib/features/home/widgets/home_navigation_bar.dart
index 5aed828f..057f8558 100644
--- a/lib/features/home/widgets/home_navigation_bar.dart
+++ b/lib/features/home/widgets/home_navigation_bar.dart
@@ -4,7 +4,11 @@ import 'package:go_router/go_router.dart';
 import 'package:tsdm_client/features/home/cubit/home_cubit.dart';
 import 'package:tsdm_client/generated/i18n/strings.g.dart';
 
+/// Navigation bar or rail of the home page.
+///
+/// Root page.
 class HomeNavigationBar extends StatefulWidget {
+  /// Constructor.
   const HomeNavigationBar({super.key});
 
   @override
@@ -19,8 +23,13 @@ class _HomeNavigationBarState extends State<HomeNavigationBar> {
 
     return NavigationBar(
       destinations: barItems
-          .map((e) => NavigationDestination(
-              icon: e.icon, selectedIcon: e.selectedIcon, label: e.label))
+          .map(
+            (e) => NavigationDestination(
+              icon: e.icon,
+              selectedIcon: e.selectedIcon,
+              label: e.label,
+            ),
+          )
           .toList(),
       selectedIndex:
           context.select<HomeCubit, HomeTab>((cubit) => cubit.state.tab).index,
diff --git a/lib/features/homepage/bloc/homepage_bloc.dart b/lib/features/homepage/bloc/homepage_bloc.dart
index 8843d47b..8e8c5cd9 100644
--- a/lib/features/homepage/bloc/homepage_bloc.dart
+++ b/lib/features/homepage/bloc/homepage_bloc.dart
@@ -16,7 +16,9 @@ import 'package:universal_html/html.dart' as uh;
 part 'homepage_event.dart';
 part 'homepage_state.dart';
 
+/// Extension on [uh.Document] to extract user info.
 extension ExtractProfileAvatar on uh.Document {
+  /// Extract the user avatar url.
   String? extractAvatar() {
     return querySelector('div#wp.wp div#ct.ct2 div.sd div.hm > p > a > img')
         ?.imageUrl();
@@ -25,6 +27,7 @@ extension ExtractProfileAvatar on uh.Document {
 
 /// Bloc for the homepage of the app.
 class HomepageBloc extends Bloc<HomepageEvent, HomepageState> {
+  /// Constructor.
   HomepageBloc({
     required ForumHomeRepository forumHomeRepository,
     required ProfileRepository profileRepository,
@@ -32,20 +35,26 @@ class HomepageBloc extends Bloc<HomepageEvent, HomepageState> {
   })  : _forumHomeRepository = forumHomeRepository,
         _profileRepository = profileRepository,
         _authenticationRepository = authenticationRepository,
-        super(forumHomeRepository.hasCache()
-            ? _parseStateFromDocument(
-                forumHomeRepository.getCache()!,
-                authenticationRepository.currentUser?.username,
-                avatarUrl: profileRepository.getCache()?.extractAvatar(),
-              )
-            : const HomepageState()) {
+        super(
+          forumHomeRepository.hasCache()
+              ? _parseStateFromDocument(
+                  forumHomeRepository.getCache()!,
+                  authenticationRepository.currentUser?.username,
+                  avatarUrl: profileRepository.getCache()?.extractAvatar(),
+                )
+              : const HomepageState(),
+        ) {
     on<HomepageLoadRequested>(_onHomepageLoadRequested);
     on<HomepageRefreshRequested>(_onHomepageRefreshRequested);
     on<_HomepageAuthChanged>(_onHomepageAuthChanged);
 
-    _authStatusSub = _authenticationRepository.status.listen((status) => add(
+    _authStatusSub = _authenticationRepository.status.listen(
+      (status) => add(
         _HomepageAuthChanged(
-            isLogged: status == AuthenticationStatus.authenticated)));
+          isLogged: status == AuthenticationStatus.authenticated,
+        ),
+      ),
+    );
   }
 
   final ForumHomeRepository _forumHomeRepository;
@@ -60,19 +69,23 @@ class HomepageBloc extends Bloc<HomepageEvent, HomepageState> {
     Emitter<HomepageState> emit,
   ) async {
     if (_forumHomeRepository.hasCache()) {
-      final s = _parseStateFromDocument(_forumHomeRepository.getCache()!,
-          _authenticationRepository.currentUser?.username,
-          avatarUrl: state.loggedUserInfo?.avatarUrl);
+      final s = _parseStateFromDocument(
+        _forumHomeRepository.getCache()!,
+        _authenticationRepository.currentUser?.username,
+        avatarUrl: state.loggedUserInfo?.avatarUrl,
+      );
       emit(s);
       return;
     }
     // Clear data.
     emit(const HomepageState(status: HomepageStatus.loading));
     try {
-      final documentList = (await Future.wait([
-        _forumHomeRepository.fetchHomePage(),
-        _profileRepository.fetchProfile()
-      ]))
+      final documentList = (await Future.wait(
+        [
+          _forumHomeRepository.fetchHomePage(),
+          _profileRepository.fetchProfile(),
+        ],
+      ))
           .whereType<uh.Document>()
           .toList();
       if (documentList.length != 2) {
@@ -127,8 +140,10 @@ class HomepageBloc extends Bloc<HomepageEvent, HomepageState> {
           ?.imageUrl();
       // Parse data and change state.
       final s = _parseStateFromDocument(
-          document, _authenticationRepository.currentUser?.username,
-          avatarUrl: avatarUrl);
+        document,
+        _authenticationRepository.currentUser?.username,
+        avatarUrl: avatarUrl,
+      );
       emit(s);
     } on HttpHandshakeFailedException catch (e) {
       debug('failed to fetch dom: $e');
@@ -251,8 +266,8 @@ class HomepageBloc extends Bloc<HomepageEvent, HomepageState> {
         pinnedThreadGroupList.add(group);
       }
 
-      // The sort on server side is not as displayed, fix the sort to keep the same
-      // with website appearance.
+      // The sort on server side is not as displayed, fix the sort to keep the
+      // same with website appearance.
       if (pinnedThreadGroupList.length >= 7) {
         pinnedThreadGroupList
           ..swap(4, 5)
@@ -301,12 +316,14 @@ List<String?> _buildKahrpbaPicHrefList(uh.Element? scriptNode) {
       .innerHtmlEx()
       .split('\n')
       .where((e) => e.contains("window.location='"))
-      .map((e) => e
-          .split("window.location='")
-          .lastOrNull
-          ?.split("'")
-          .firstOrNull
-          ?.replaceFirst('&amp;', '&'))
+      .map(
+        (e) => e
+            .split("window.location='")
+            .lastOrNull
+            ?.split("'")
+            .firstOrNull
+            ?.replaceFirst('&amp;', '&'),
+      )
       .toList();
 }
 
diff --git a/lib/features/homepage/bloc/homepage_event.dart b/lib/features/homepage/bloc/homepage_event.dart
index 5dedf659..7606540c 100644
--- a/lib/features/homepage/bloc/homepage_event.dart
+++ b/lib/features/homepage/bloc/homepage_event.dart
@@ -8,9 +8,14 @@ sealed class HomepageEvent extends Equatable {
   List<Object> get props => [];
 }
 
+/// User request to load the homepage.
+///
+/// This will load from cache if available.
 final class HomepageLoadRequested extends HomepageEvent {}
 
 /// User requests to refresh homepage.
+///
+/// Directly load homepage from server.
 final class HomepageRefreshRequested extends HomepageEvent {}
 
 /// User requests to login.
diff --git a/lib/features/homepage/bloc/homepage_state.dart b/lib/features/homepage/bloc/homepage_state.dart
index 6a147da8..cf28be91 100644
--- a/lib/features/homepage/bloc/homepage_state.dart
+++ b/lib/features/homepage/bloc/homepage_state.dart
@@ -19,19 +19,25 @@ enum HomepageStatus {
   /// Failed to load data.
   failed;
 
+  /// Is [initial]?
   bool get isInitial => this == HomepageStatus.initial;
 
+  /// Is [needLogin]?
   bool get isNeedLogin => this == HomepageStatus.needLogin;
 
+  /// Is [loading]?
   bool get isLoading => this == HomepageStatus.loading;
 
+  /// Is [success]?
   bool get isSuccess => this == HomepageStatus.success;
 
+  /// Is [failed]?
   bool get isFailed => this == HomepageStatus.failed;
 }
 
 /// State of homepage.
 final class HomepageState extends Equatable {
+  /// Constructor.
   const HomepageState({
     this.status = HomepageStatus.initial,
     this.forumStatus = const ForumStatus.empty(),
@@ -57,6 +63,7 @@ final class HomepageState extends Equatable {
   /// Swiper urls in the homepage.
   final List<SwiperUrl> swiperUrlList;
 
+  /// Copy with
   HomepageState copyWith({
     HomepageStatus? status,
     ForumStatus? forumStatus,
diff --git a/lib/features/homepage/models/forum_status.dart b/lib/features/homepage/models/forum_status.dart
index faaf1c4e..6074134c 100644
--- a/lib/features/homepage/models/forum_status.dart
+++ b/lib/features/homepage/models/forum_status.dart
@@ -4,12 +4,14 @@ import 'package:equatable/equatable.dart';
 ///
 /// Including threads/replies in today and yesterday, and member count.
 final class ForumStatus extends Equatable {
+  /// Constructor.
   const ForumStatus({
     required this.todayCount,
     required this.yesterdayCount,
     required this.threadCount,
   });
 
+  /// Construct an empty forum status.
   const ForumStatus.empty()
       : todayCount = '0',
         yesterdayCount = '0',
diff --git a/lib/features/homepage/models/logged_user_info.dart b/lib/features/homepage/models/logged_user_info.dart
index 654a30b7..5d339287 100644
--- a/lib/features/homepage/models/logged_user_info.dart
+++ b/lib/features/homepage/models/logged_user_info.dart
@@ -6,6 +6,7 @@ import 'package:equatable/equatable.dart';
 /// * The logged user may have an avatar url or not, depending on the theme of
 ///   website.
 final class LoggedUserInfo extends Equatable {
+  /// Constructor.
   const LoggedUserInfo({
     required this.username,
     required this.relatedLinkPairList,
diff --git a/lib/features/homepage/models/pinned_thread.dart b/lib/features/homepage/models/pinned_thread.dart
index cead7192..ce4ec0f4 100644
--- a/lib/features/homepage/models/pinned_thread.dart
+++ b/lib/features/homepage/models/pinned_thread.dart
@@ -4,6 +4,7 @@ import 'package:equatable/equatable.dart';
 ///
 /// Contains thread info and the author's info.
 final class PinnedThread extends Equatable {
+  /// Constructor.
   const PinnedThread({
     required this.threadUrl,
     required this.threadTitle,
diff --git a/lib/features/homepage/models/pinned_thread_group.dart b/lib/features/homepage/models/pinned_thread_group.dart
index 655c184a..d9dc9b5c 100644
--- a/lib/features/homepage/models/pinned_thread_group.dart
+++ b/lib/features/homepage/models/pinned_thread_group.dart
@@ -3,6 +3,7 @@ import 'package:tsdm_client/features/homepage/models/pinned_thread.dart';
 
 /// A list of recommended thread with grouped name in the website homepage.
 final class PinnedThreadGroup extends Equatable {
+  /// Constructor.
   const PinnedThreadGroup({required this.title, required this.threadList});
 
   /// Title of this thread group.
diff --git a/lib/features/homepage/models/swiper_url.dart b/lib/features/homepage/models/swiper_url.dart
index 3f930aa3..079edc49 100644
--- a/lib/features/homepage/models/swiper_url.dart
+++ b/lib/features/homepage/models/swiper_url.dart
@@ -2,6 +2,7 @@ import 'package:equatable/equatable.dart';
 
 /// A pair of url used in swiper in homepage.
 final class SwiperUrl extends Equatable {
+  /// Constructor.
   const SwiperUrl({required this.coverUrl, required this.linkUrl});
 
   /// Url of the Cover image.
diff --git a/lib/features/homepage/repository/homepage_repository.dart b/lib/features/homepage/repository/homepage_repository.dart
deleted file mode 100644
index e756e3b9..00000000
--- a/lib/features/homepage/repository/homepage_repository.dart
+++ /dev/null
@@ -1,3 +0,0 @@
-class HomepageRepository {
-  // final authen
-}
diff --git a/lib/features/homepage/view/homepage_page.dart b/lib/features/homepage/view/homepage_page.dart
index 6b9c149c..9ae34f3d 100644
--- a/lib/features/homepage/view/homepage_page.dart
+++ b/lib/features/homepage/view/homepage_page.dart
@@ -20,6 +20,7 @@ import 'package:tsdm_client/utils/retry_button.dart';
 ///
 /// This page is in the Homepage of the app, already wrapped in a [Scaffold].
 class HomepagePage extends StatefulWidget {
+  /// Constructor.
   const HomepagePage({super.key});
 
   @override
@@ -51,7 +52,12 @@ class _HomepagePageState extends State<HomepagePage> {
         listener: (context, state) {
           if (state.status == HomepageStatus.failed) {
             ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text(context.t.general.failedToLoad)));
+              SnackBar(
+                content: Text(
+                  context.t.general.failedToLoad,
+                ),
+              ),
+            );
           }
         },
         child: BlocBuilder<HomepageBloc, HomepageState>(
@@ -107,7 +113,7 @@ class _HomepagePageState extends State<HomepagePage> {
                     onPressed: () async {
                       await context.pushNamed(ScreenPaths.search);
                     },
-                  )
+                  ),
                 ],
               ),
               body: body,
diff --git a/lib/features/homepage/widgets/pin_section.dart b/lib/features/homepage/widgets/pin_section.dart
index 0a329a30..2eda7463 100644
--- a/lib/features/homepage/widgets/pin_section.dart
+++ b/lib/features/homepage/widgets/pin_section.dart
@@ -11,12 +11,16 @@ import 'package:tsdm_client/widgets/single_line_text.dart';
 ///
 /// Threads are separated into different groups.
 class PinSection extends StatelessWidget {
+  /// Constructor.
   const PinSection(this.pinnedThreadGroup, {super.key});
 
+  /// All pinned thread gathered in groups.
   final List<PinnedThreadGroup> pinnedThreadGroup;
 
   Widget _sectionThreadBuilder(
-      BuildContext context, PinnedThread pinnedThread) {
+    BuildContext context,
+    PinnedThread pinnedThread,
+  ) {
     return ListTile(
       title: SingleLineText(
         pinnedThread.threadTitle,
@@ -64,23 +68,25 @@ class PinSection extends StatelessWidget {
       final sectionName = pinnedThreadGroup[i].title;
       final threadWidgetList =
           _buildSectionThreads(context, pinnedThreadGroup[i].threadList);
-      ret.add(Card(
-        clipBehavior: Clip.hardEdge,
-        margin: EdgeInsets.zero,
-        child: Padding(
-          padding: edgeInsetsT10,
-          child: Column(
-            children: [
-              Text(
-                sectionName,
-                style: Theme.of(context).textTheme.titleLarge,
-              ),
-              sizedBoxW10H10,
-              threadWidgetList,
-            ],
+      ret.add(
+        Card(
+          clipBehavior: Clip.hardEdge,
+          margin: EdgeInsets.zero,
+          child: Padding(
+            padding: edgeInsetsT10,
+            child: Column(
+              children: [
+                Text(
+                  sectionName,
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+                sizedBoxW10H10,
+                threadWidgetList,
+              ],
+            ),
           ),
         ),
-      ));
+      );
     }
 
     return GridView(
@@ -89,7 +95,8 @@ class PinSection extends StatelessWidget {
       // TODO: Not hardcode these Extent sizes.
       gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
         maxCrossAxisExtent: 800,
-        // Set to at least 552 to ensure not overflow when scaling window size down.
+        // Set to at least 552 to ensure not overflow when scaling window
+        // size down.
         mainAxisSpacing: 5,
         mainAxisExtent: 552,
         crossAxisSpacing: 5,
diff --git a/lib/features/homepage/widgets/welcome_section.dart b/lib/features/homepage/widgets/welcome_section.dart
index 15271de0..902d42aa 100644
--- a/lib/features/homepage/widgets/welcome_section.dart
+++ b/lib/features/homepage/widgets/welcome_section.dart
@@ -16,7 +16,9 @@ import 'package:tsdm_client/widgets/cached_image/cached_image_provider.dart';
 import 'package:tsdm_client/widgets/checkin_button/checkin_button.dart';
 import 'package:tsdm_client/widgets/single_line_text.dart';
 
+/// A section of homepage, contains swiper and user info.
 class WelcomeSection extends StatelessWidget {
+  /// Constructor.
   const WelcomeSection({
     required this.forumStatus,
     required this.loggedUserInfo,
@@ -24,15 +26,24 @@ class WelcomeSection extends StatelessWidget {
     super.key,
   });
 
+  /// Forum status.
   final ForumStatus forumStatus;
+
+  /// Current logged user info.
+  ///
+  /// Null if no one logged.
   final LoggedUserInfo? loggedUserInfo;
+
+  /// All urls used in swiper.
   final List<SwiperUrl> swiperUrlList;
 
   static const double _kahrpbaPicWidth = 300;
   static const double _kahrpbaPicHeight = 218;
 
   Widget _buildKahrpbaSwiper(
-      BuildContext context, List<SwiperUrl> swiperUrlList) {
+    BuildContext context,
+    List<SwiperUrl> swiperUrlList,
+  ) {
     return Card(
       margin: EdgeInsets.zero,
       clipBehavior: Clip.antiAlias,
diff --git a/lib/features/jump_page/cubit/jump_page_cubit.dart b/lib/features/jump_page/cubit/jump_page_cubit.dart
index 0802d01e..76ab4bd3 100644
--- a/lib/features/jump_page/cubit/jump_page_cubit.dart
+++ b/lib/features/jump_page/cubit/jump_page_cubit.dart
@@ -5,12 +5,16 @@ part 'jump_page_state.dart';
 
 /// Cubit of jump page feature.
 ///
-/// This cubit is used inside other pages that can "jump to another page" logically.
+/// This cubit is used inside other pages that can "jump to another page"
+/// logically.
 ///
-/// Provides the logic that need to handle in other widgets when jump page actions triggered..
+/// Provides the logic that need to handle in other widgets when jump page
+/// actions triggered..
 class JumpPageCubit extends Cubit<JumpPageState> {
+  /// Constructor.
   JumpPageCubit() : super(const JumpPageState());
 
+  /// Jump to another [page].
   void jumpTo(int page) => emit(
         state.copyWith(
           status: JumpPageStatus.success,
@@ -18,12 +22,15 @@ class JumpPageCubit extends Cubit<JumpPageState> {
         ),
       );
 
+  /// Mark the current page is loading, disable jump page.
   void markLoading() =>
       emit(state.copyWith(status: JumpPageStatus.loading, canJumpPage: false));
 
+  /// Mark the current page finished loading, enable jump page.
   void markSuccess() =>
       emit(state.copyWith(status: JumpPageStatus.success, canJumpPage: true));
 
+  /// Set current page status and total page status.
   void setPageInfo({int? currentPage, int? totalPages}) =>
       emit(state.copyWith(currentPage: currentPage, totalPages: totalPages));
 }
diff --git a/lib/features/jump_page/cubit/jump_page_state.dart b/lib/features/jump_page/cubit/jump_page_state.dart
index 5a970c42..60ad9a15 100644
--- a/lib/features/jump_page/cubit/jump_page_state.dart
+++ b/lib/features/jump_page/cubit/jump_page_state.dart
@@ -1,12 +1,20 @@
 part of 'jump_page_cubit.dart';
 
+/// status of jumping page.
 enum JumpPageStatus {
+  /// Initial.
   initial,
+
+  /// Loading the new page.
   loading,
+
+  /// Load succeed.
   success,
 }
 
+/// State of jumping page.
 final class JumpPageState extends Equatable {
+  /// Constructor.
   const JumpPageState({
     this.status = JumpPageStatus.initial,
     this.currentPage = 1,
@@ -14,6 +22,7 @@ final class JumpPageState extends Equatable {
     this.canJumpPage = true,
   });
 
+  /// Status of jumping.
   final JumpPageStatus status;
 
   /// Current page number
@@ -21,8 +30,11 @@ final class JumpPageState extends Equatable {
 
   /// Total page number.
   final int totalPages;
+
+  /// Flag indicates can jump page or not.
   final bool canJumpPage;
 
+  /// Copy with.
   JumpPageState copyWith({
     JumpPageStatus? status,
     int? currentPage,
diff --git a/lib/features/jump_page/widgets/jump_page_dialog.dart b/lib/features/jump_page/widgets/jump_page_dialog.dart
index bf689271..4753ffac 100644
--- a/lib/features/jump_page/widgets/jump_page_dialog.dart
+++ b/lib/features/jump_page/widgets/jump_page_dialog.dart
@@ -3,7 +3,9 @@ import 'dart:math' as math;
 import 'package:flutter/material.dart';
 import 'package:tsdm_client/generated/i18n/strings.g.dart';
 
+/// A dialog to ask jump page info from user before jump page.
 class JumpPageDialog extends StatelessWidget {
+  /// Constructor.
   const JumpPageDialog({
     required this.current,
     required this.max,
@@ -14,8 +16,13 @@ class JumpPageDialog extends StatelessWidget {
         assert(min <= current, 'current should larger than min'),
         assert(current <= max, 'current should no more than max');
 
+  /// Current page number.
   final int current;
+
+  /// Minimum page number.
   final int min;
+
+  /// Maximum page number.
   final int max;
 
   @override
@@ -29,24 +36,28 @@ class JumpPageDialog extends StatelessWidget {
     ).toList();
     return AlertDialog(
       title: Text(context.t.jumpDialog.title),
-      // FIXME: Here should handle better when both large mount or small mount of choices.
-      // Issue is that Column will junk is choices are too many and ListView fills all height even there are only few choices.
+      // FIXME: Here should handle better when both large mount or small mount
+      //  of choices.
+      // Issue is that Column will junk is choices are too many and ListView
+      // fills all height even there are only few choices.
       content: choicesList.length <= 30
           ? SingleChildScrollView(
               child: Column(
                 children: choicesList
-                    .map((e) => RadioListTile(
-                          title: Text('$e'),
-                          value: e,
-                          groupValue: v,
-                          onChanged: (value) {
-                            if (value == null) {
-                              return;
-                            }
-                            v = value;
-                            Navigator.pop(context, v);
-                          },
-                        ))
+                    .map(
+                      (e) => RadioListTile(
+                        title: Text('$e'),
+                        value: e,
+                        groupValue: v,
+                        onChanged: (value) {
+                          if (value == null) {
+                            return;
+                          }
+                          v = value;
+                          Navigator.pop(context, v);
+                        },
+                      ),
+                    )
                     .toList(),
               ),
             )
diff --git a/lib/features/latest_thread/bloc/latest_thread_bloc.dart b/lib/features/latest_thread/bloc/latest_thread_bloc.dart
index 63a88dd2..3b99beca 100644
--- a/lib/features/latest_thread/bloc/latest_thread_bloc.dart
+++ b/lib/features/latest_thread/bloc/latest_thread_bloc.dart
@@ -11,10 +11,13 @@ import 'package:universal_html/html.dart' as uh;
 part 'latest_thread_event.dart';
 part 'latest_thread_state.dart';
 
+/// Emitter
 typedef LatestThreadEmitter = Emitter<LatestThreadState>;
 
+/// Bloc the the latest thread feature.
 final class LatestThreadBloc
     extends Bloc<LatestThreadEvent, LatestThreadState> {
+  /// Constructor.
   LatestThreadBloc({required LatestThreadRepository latestThreadRepository})
       : _latestThreadRepository = latestThreadRepository,
         super(const LatestThreadState()) {
@@ -37,12 +40,14 @@ final class LatestThreadBloc
       final document =
           await _latestThreadRepository.fetchDocument(state.nextPageUrl!);
       final (threadList, nextPageUrl) = _parseThreadList(document);
-      emit(state.copyWith(
-        status: LatestThreadStatus.success,
-        threadList: [...state.threadList, ...?threadList],
-        pageNumber: state.pageNumber + 1,
-        nextPageUrl: nextPageUrl,
-      ));
+      emit(
+        state.copyWith(
+          status: LatestThreadStatus.success,
+          threadList: [...state.threadList, ...?threadList],
+          pageNumber: state.pageNumber + 1,
+          nextPageUrl: nextPageUrl,
+        ),
+      );
     } on HttpRequestFailedException catch (e) {
       debug('failed to load latest thread next page: $e');
       emit(state.copyWith(status: LatestThreadStatus.failed));
@@ -57,12 +62,14 @@ final class LatestThreadBloc
     try {
       final document = await _latestThreadRepository.fetchDocument(event.url);
       final (threadList, nextPageUrl) = _parseThreadList(document);
-      emit(state.copyWith(
-        status: LatestThreadStatus.success,
-        threadList: threadList,
-        pageNumber: 1,
-        nextPageUrl: nextPageUrl,
-      ));
+      emit(
+        state.copyWith(
+          status: LatestThreadStatus.success,
+          threadList: threadList,
+          pageNumber: 1,
+          nextPageUrl: nextPageUrl,
+        ),
+      );
     } on HttpRequestFailedException catch (e) {
       debug('failed to load latest thread page: $e');
       emit(state.copyWith(status: LatestThreadStatus.failed));
@@ -70,7 +77,8 @@ final class LatestThreadBloc
   }
 
   (List<LatestThread>?, String? nextPageUrl) _parseThreadList(
-      uh.Document document) {
+    uh.Document document,
+  ) {
     final data = document
         .querySelector('div#threadlist > ul')
         ?.querySelectorAll('li')
diff --git a/lib/features/latest_thread/bloc/latest_thread_event.dart b/lib/features/latest_thread/bloc/latest_thread_event.dart
index ab1d93d6..9e2c34d7 100644
--- a/lib/features/latest_thread/bloc/latest_thread_event.dart
+++ b/lib/features/latest_thread/bloc/latest_thread_event.dart
@@ -1,5 +1,6 @@
 part of 'latest_thread_bloc.dart';
 
+/// Events of latest thread feature.
 sealed class LatestThreadEvent extends Equatable {
   const LatestThreadEvent();
 
@@ -7,9 +8,14 @@ sealed class LatestThreadEvent extends Equatable {
   List<Object?> get props => [];
 }
 
+/// No more page to load.
 final class LatestThreadLoadMoreRequested extends LatestThreadEvent {}
 
+/// User request to refresh.
 final class LatestThreadRefreshRequested extends LatestThreadEvent {
+  /// Constructor.
   const LatestThreadRefreshRequested(this.url) : super();
+
+  /// Url to load page.
   final String url;
 }
diff --git a/lib/features/latest_thread/bloc/latest_thread_state.dart b/lib/features/latest_thread/bloc/latest_thread_state.dart
index 0f4363db..5997e7e9 100644
--- a/lib/features/latest_thread/bloc/latest_thread_state.dart
+++ b/lib/features/latest_thread/bloc/latest_thread_state.dart
@@ -1,13 +1,23 @@
 part of 'latest_thread_bloc.dart';
 
+/// Status of the latest thread feature.
 enum LatestThreadStatus {
+  /// Initial.
   initial,
+
+  /// Loading.
   loading,
+
+  /// Success.
   success,
+
+  /// Failed to load.
   failed,
 }
 
+/// State of the latest thread feature.
 final class LatestThreadState extends Equatable {
+  /// Constructor.
   const LatestThreadState({
     this.status = LatestThreadStatus.initial,
     this.threadList = const [],
@@ -15,11 +25,19 @@ final class LatestThreadState extends Equatable {
     this.nextPageUrl,
   });
 
+  /// Status.
   final LatestThreadStatus status;
+
+  /// All thread to display.
   final List<LatestThread> threadList;
+
+  /// Current page number.
   final int pageNumber;
+
+  /// Url to fetch the next page.
   final String? nextPageUrl;
 
+  /// Copy with
   LatestThreadState copyWith({
     LatestThreadStatus? status,
     List<LatestThread>? threadList,
diff --git a/lib/features/latest_thread/models/latest_thread.dart b/lib/features/latest_thread/models/latest_thread.dart
index 5fe22ec8..b7e83aac 100644
--- a/lib/features/latest_thread/models/latest_thread.dart
+++ b/lib/features/latest_thread/models/latest_thread.dart
@@ -1,11 +1,9 @@
-import 'package:flutter/foundation.dart';
 import 'package:tsdm_client/extensions/string.dart';
 import 'package:tsdm_client/extensions/universal_html.dart';
 import 'package:tsdm_client/shared/models/user.dart';
 import 'package:tsdm_client/utils/debug.dart';
 import 'package:universal_html/html.dart' as uh;
 
-@immutable
 class _LatestThreadInfo {
   const _LatestThreadInfo({
     required this.title,
@@ -60,31 +58,43 @@ class _LatestThreadInfo {
   final String? quotedMessage;
 }
 
+/// Latest thread model.
 class LatestThread {
+  /// Build from <li> node.
   LatestThread.fromLi(uh.Element element) : _info = _buildFromLiNode(element);
 
   final _LatestThreadInfo? _info;
 
   static final _re = RegExp(r'(?<count>\d+)');
 
+  /// Thread title.
   String? get title => _info?.title;
 
+  /// Thread url.
   String? get url => _info?.url;
 
+  /// Thread id.
   String? get threadID => _info?.threadID;
 
+  /// Forum name the thread belongs to.
   String? get forumName => _info?.forumName;
 
+  /// Forum url the thread belongs to.
   String? get forumUrl => _info?.forumUrl;
 
+  /// The user info of latest replied user.
   User? get latestReplyAuthor => _info?.latestReplyAuthor;
 
+  /// Time of latest reply.
   DateTime? get latestReplyTime => _info?.latestReplyTime;
 
+  /// Total replies count.
   int? get replyCount => _info?.replyCount;
 
+  /// View times count.
   int? get viewCount => _info?.viewCount;
 
+  /// Quoted message to show.
   String? get quotedMessage => _info?.quotedMessage;
 
   /// <div id="threadlist">
@@ -179,6 +189,7 @@ failed to parse LatestThread node: {
     );
   }
 
+  /// Is valid or not.
   bool isValid() {
     return _info != null;
   }
diff --git a/lib/features/latest_thread/repository/latest_thread_repository.dart b/lib/features/latest_thread/repository/latest_thread_repository.dart
index 1c41ff9e..f4479d98 100644
--- a/lib/features/latest_thread/repository/latest_thread_repository.dart
+++ b/lib/features/latest_thread/repository/latest_thread_repository.dart
@@ -7,6 +7,7 @@ import 'package:tsdm_client/shared/providers/server_time_provider/sevrer_time_pr
 import 'package:universal_html/html.dart' as uh;
 import 'package:universal_html/parsing.dart';
 
+/// Repository of the latest thread feature.
 class LatestThreadRepository {
   /// Fetch html document from [url].
   ///
diff --git a/lib/features/latest_thread/view/latest_thread_page.dart b/lib/features/latest_thread/view/latest_thread_page.dart
index b8bfcb40..72c6e563 100644
--- a/lib/features/latest_thread/view/latest_thread_page.dart
+++ b/lib/features/latest_thread/view/latest_thread_page.dart
@@ -8,9 +8,12 @@ import 'package:tsdm_client/generated/i18n/strings.g.dart';
 import 'package:tsdm_client/utils/retry_button.dart';
 import 'package:tsdm_client/widgets/card/thread_card.dart';
 
+/// Page to show info about latest thread page.
 class LatestThreadPage extends StatefulWidget {
+  /// Constructor.
   const LatestThreadPage({required this.url, super.key});
 
+  /// Url the the page.
   final String url;
 
   @override
@@ -58,7 +61,9 @@ class _LatestThreadPageState extends State<LatestThreadPage> {
   void initState() {
     super.initState();
     _refreshController = EasyRefreshController(
-        controlFinishLoad: true, controlFinishRefresh: true);
+      controlFinishLoad: true,
+      controlFinishRefresh: true,
+    );
   }
 
   @override
@@ -76,15 +81,18 @@ class _LatestThreadPageState extends State<LatestThreadPage> {
         ),
         BlocProvider(
           create: (context) => LatestThreadBloc(
-              latestThreadRepository: RepositoryProvider.of(context))
-            ..add(LatestThreadRefreshRequested(widget.url)),
-        )
+            latestThreadRepository: RepositoryProvider.of(context),
+          )..add(LatestThreadRefreshRequested(widget.url)),
+        ),
       ],
       child: BlocListener<LatestThreadBloc, LatestThreadState>(
         listener: (context, state) {
           if (state.status == LatestThreadStatus.failed) {
             ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text(context.t.general.failedToLoad)));
+              SnackBar(
+                content: Text(context.t.general.failedToLoad),
+              ),
+            );
           }
         },
         child: BlocBuilder<LatestThreadBloc, LatestThreadState>(
diff --git a/lib/widgets/list_app_bar.dart b/lib/widgets/list_app_bar.dart
index d4545df5..3fefcee6 100644
--- a/lib/widgets/list_app_bar.dart
+++ b/lib/widgets/list_app_bar.dart
@@ -13,7 +13,7 @@ enum MenuActions {
   backToTop,
 }
 
-class ListAppBar<T> extends StatelessWidget implements PreferredSizeWidget {
+class ListAppBar extends StatelessWidget implements PreferredSizeWidget {
   const ListAppBar({
     required this.onSearch,
     this.title,