diff --git a/lib/common/constants.dart b/lib/common/constants.dart
index b018cfb03..01cdbcb7e 100644
--- a/lib/common/constants.dart
+++ b/lib/common/constants.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 
-class StyleString {
+abstract final class StyleString {
   static const double cardSpace = 8;
   static const double safeSpace = 12;
   static const BorderRadius mdRadius = BorderRadius.all(imgRadius);
@@ -9,9 +9,13 @@ class StyleString {
   static const bottomSheetRadius = BorderRadius.vertical(
     top: Radius.circular(18),
   );
+  static const dialogFixedConstraints = BoxConstraints(
+    minWidth: 420,
+    maxWidth: 420,
+  );
 }
 
-class Constants {
+abstract final class Constants {
   static const appName = 'PiliPlus';
   static const sourceCodeUrl = 'https://github.com/bggRGjQaUbCoE/PiliPlus';
 
diff --git a/lib/common/widgets/dialog/report.dart b/lib/common/widgets/dialog/report.dart
index 1da1dd78c..1c7f4f698 100644
--- a/lib/common/widgets/dialog/report.dart
+++ b/lib/common/widgets/dialog/report.dart
@@ -20,7 +20,6 @@ Future<void> autoWrapReportDialog(
     context: context,
     builder: (context) {
       return AlertDialog(
-        constraints: const BoxConstraints(minWidth: 280, maxWidth: 420),
         title: const Text('举报'),
         titlePadding: const .only(left: 22, top: 16, right: 22),
         contentPadding: const .symmetric(vertical: 5),
diff --git a/lib/common/widgets/video_popup_menu.dart b/lib/common/widgets/video_popup_menu.dart
index 4667a4ce1..5634597a7 100644
--- a/lib/common/widgets/video_popup_menu.dart
+++ b/lib/common/widgets/video_popup_menu.dart
@@ -116,21 +116,13 @@ class VideoPopupMenu extends StatelessWidget {
                                 context: context,
                                 builder: (context) {
                                   return Dialog(
-                                    child: ConstrainedBox(
-                                      constraints: const BoxConstraints(
-                                        minWidth: 280,
-                                        maxWidth: 420,
-                                      ),
-                                      child: Padding(
-                                        padding: const EdgeInsets.symmetric(
-                                          vertical: 14,
-                                        ),
-                                        child: AiConclusionPanel.buildContent(
-                                          context,
-                                          Theme.of(context),
-                                          res,
-                                          tap: false,
-                                        ),
+                                    child: Padding(
+                                      padding: const .symmetric(vertical: 14),
+                                      child: AiConclusionPanel.buildContent(
+                                        context,
+                                        Theme.of(context),
+                                        res,
+                                        tap: false,
                                       ),
                                     ),
                                   );
@@ -201,8 +193,7 @@ class VideoPopupMenu extends StatelessWidget {
                                 return AlertDialog(
                                   content: SingleChildScrollView(
                                     child: Column(
-                                      crossAxisAlignment:
-                                          CrossAxisAlignment.start,
+                                      crossAxisAlignment: .start,
                                       children: [
                                         if (tp.dislikeReasons != null) ...[
                                           const Text('我不想看'),
diff --git a/lib/grpc/audio.dart b/lib/grpc/audio.dart
index 1d36efaf6..09d8eb6cf 100644
--- a/lib/grpc/audio.dart
+++ b/lib/grpc/audio.dart
@@ -6,7 +6,7 @@ import 'package:PiliPlus/grpc/url.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:fixnum/fixnum.dart';
 
-class AudioGrpc {
+abstract final class AudioGrpc {
   static Future<LoadingState<PlayURLResp>> audioPlayUrl({
     required Int64 oid,
     required List<Int64> subId,
diff --git a/lib/grpc/dm.dart b/lib/grpc/dm.dart
index 535a13c66..8cc73eaf8 100644
--- a/lib/grpc/dm.dart
+++ b/lib/grpc/dm.dart
@@ -4,7 +4,7 @@ import 'package:PiliPlus/grpc/url.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:fixnum/fixnum.dart';
 
-class DmGrpc {
+abstract final class DmGrpc {
   static Future<LoadingState<DmSegMobileReply>> dmSegMobile({
     required int cid,
     required int segmentIndex,
diff --git a/lib/grpc/dyn.dart b/lib/grpc/dyn.dart
index 573d5764d..cc525a991 100644
--- a/lib/grpc/dyn.dart
+++ b/lib/grpc/dyn.dart
@@ -7,7 +7,7 @@ import 'package:PiliPlus/grpc/url.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:fixnum/fixnum.dart';
 
-class DynGrpc {
+abstract final class DynGrpc {
   // static Future dynSpace({
   //   required int uid,
   //   required int page,
diff --git a/lib/grpc/grpc_req.dart b/lib/grpc/grpc_req.dart
index bb5fb6d7b..8cb331cf6 100644
--- a/lib/grpc/grpc_req.dart
+++ b/lib/grpc/grpc_req.dart
@@ -20,7 +20,7 @@ import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart' show kDebugMode;
 import 'package:protobuf/protobuf.dart' show GeneratedMessage;
 
-class GrpcReq {
+abstract final class GrpcReq {
   static String? _accessKey = Accounts.main.accessKey;
   static const _build = 2001100;
   static const _versionName = '2.0.1';
diff --git a/lib/grpc/im.dart b/lib/grpc/im.dart
index b5e1454cd..9a0a47418 100644
--- a/lib/grpc/im.dart
+++ b/lib/grpc/im.dart
@@ -8,7 +8,7 @@ import 'package:fixnum/fixnum.dart';
 import 'package:protobuf/protobuf.dart' show PbMap;
 import 'package:uuid/uuid.dart';
 
-class ImGrpc {
+abstract final class ImGrpc {
   static Future<LoadingState<RspSendMsg>> sendMsg({
     required int senderUid,
     required int receiverId,
diff --git a/lib/grpc/reply.dart b/lib/grpc/reply.dart
index f265a5559..c2634a580 100644
--- a/lib/grpc/reply.dart
+++ b/lib/grpc/reply.dart
@@ -7,7 +7,7 @@ import 'package:PiliPlus/http/loading_state.dart';
 import 'package:PiliPlus/utils/storage_pref.dart';
 import 'package:fixnum/fixnum.dart';
 
-class ReplyGrpc {
+abstract final class ReplyGrpc {
   static bool antiGoodsReply = Pref.antiGoodsReply;
   static RegExp replyRegExp = RegExp(
     Pref.banWordForReply,
diff --git a/lib/grpc/space.dart b/lib/grpc/space.dart
index ec27ff366..e81ae17af 100644
--- a/lib/grpc/space.dart
+++ b/lib/grpc/space.dart
@@ -5,7 +5,7 @@ import 'package:PiliPlus/grpc/url.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:fixnum/fixnum.dart';
 
-class SpaceGrpc {
+abstract final class SpaceGrpc {
   static Future<LoadingState<OpusSpaceFlowResp>> opusSpaceFlow({
     required int hostMid,
     String? next,
diff --git a/lib/grpc/url.dart b/lib/grpc/url.dart
index 485b54399..0bbdc6b3b 100644
--- a/lib/grpc/url.dart
+++ b/lib/grpc/url.dart
@@ -1,4 +1,4 @@
-class GrpcUrl {
+abstract final class GrpcUrl {
   // static const playerOnline =
   //     '/bilibili.app.playeronline.v1.PlayerOnline/PlayerOnline';
   // static const popular = '/bilibili.app.show.v1.Popular/Index';
diff --git a/lib/grpc/view.dart b/lib/grpc/view.dart
index 99f7a5fd8..e8de15f06 100644
--- a/lib/grpc/view.dart
+++ b/lib/grpc/view.dart
@@ -4,7 +4,7 @@ import 'package:PiliPlus/grpc/grpc_req.dart';
 import 'package:PiliPlus/grpc/url.dart';
 import 'package:PiliPlus/http/loading_state.dart';
 
-class ViewGrpc {
+abstract final class ViewGrpc {
   static Future<LoadingState<ViewReply>> view({
     required String bvid,
   }) {
diff --git a/lib/http/api.dart b/lib/http/api.dart
index 14311292a..9c76382a2 100644
--- a/lib/http/api.dart
+++ b/lib/http/api.dart
@@ -1,6 +1,6 @@
 import 'package:PiliPlus/http/constants.dart';
 
-class Api {
+abstract final class Api {
   // 推荐视频
   static const String recommendListApp =
       '${HttpString.appBaseUrl}/x/v2/feed/index';
diff --git a/lib/http/black.dart b/lib/http/black.dart
index 766b0b8de..b1001765a 100644
--- a/lib/http/black.dart
+++ b/lib/http/black.dart
@@ -4,7 +4,7 @@ import 'package:PiliPlus/http/loading_state.dart';
 import 'package:PiliPlus/models_new/blacklist/data.dart';
 import 'package:PiliPlus/utils/accounts.dart';
 
-class BlackHttp {
+abstract final class BlackHttp {
   static Future<LoadingState<BlackListData>> blackList({
     required int pn,
     int ps = 50,
diff --git a/lib/http/constants.dart b/lib/http/constants.dart
index 0f1f06975..cbd3dbbbd 100644
--- a/lib/http/constants.dart
+++ b/lib/http/constants.dart
@@ -1,4 +1,4 @@
-class HttpString {
+abstract final class HttpString {
   static const String baseUrl = 'https://www.bilibili.com';
   static const String apiBaseUrl = 'https://api.bilibili.com';
   static const String tUrl = 'https://api.vc.bilibili.com';
diff --git a/lib/http/dynamics.dart b/lib/http/dynamics.dart
index 58e7472dd..6e7ee3ab5 100644
--- a/lib/http/dynamics.dart
+++ b/lib/http/dynamics.dart
@@ -25,7 +25,7 @@ import 'package:PiliPlus/utils/utils.dart';
 import 'package:PiliPlus/utils/wbi_sign.dart';
 import 'package:dio/dio.dart';
 
-class DynamicsHttp {
+abstract final class DynamicsHttp {
   @pragma('vm:notify-debugger-on-exception')
   static Future<LoadingState<DynamicsDataModel>> followDynamic({
     DynamicsTabType type = DynamicsTabType.all,
diff --git a/lib/http/login.dart b/lib/http/login.dart
index cc7070425..542af8d57 100644
--- a/lib/http/login.dart
+++ b/lib/http/login.dart
@@ -15,7 +15,7 @@ import 'package:crypto/crypto.dart';
 import 'package:dio/dio.dart';
 import 'package:encrypt/encrypt.dart';
 
-class LoginHttp {
+abstract final class LoginHttp {
   static final String deviceId = LoginUtils.genDeviceId();
   static String get buvid => LoginUtils.buvid;
   static final Map<String, String> headers = {
diff --git a/lib/http/music.dart b/lib/http/music.dart
index 9e0fc15eb..74d37d94c 100644
--- a/lib/http/music.dart
+++ b/lib/http/music.dart
@@ -7,7 +7,7 @@ import 'package:PiliPlus/utils/accounts.dart';
 import 'package:PiliPlus/utils/wbi_sign.dart';
 import 'package:dio/dio.dart';
 
-class MusicHttp {
+abstract final class MusicHttp {
   static Future<LoadingState<MusicDetail>> bgmDetail(String musicId) async {
     final res = await Request().get(
       Api.bgmDetail,
diff --git a/lib/http/search.dart b/lib/http/search.dart
index 702a43dfd..66cbe6f83 100644
--- a/lib/http/search.dart
+++ b/lib/http/search.dart
@@ -17,7 +17,7 @@ import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 
-class SearchHttp {
+abstract final class SearchHttp {
   // 获取搜索建议
   static Future<LoadingState<SearchSuggestModel>> searchSuggest({
     required String term,
diff --git a/lib/http/user.dart b/lib/http/user.dart
index 3d23e06fc..2acf7cd06 100644
--- a/lib/http/user.dart
+++ b/lib/http/user.dart
@@ -20,7 +20,7 @@ import 'package:PiliPlus/utils/global_data.dart';
 import 'package:PiliPlus/utils/wbi_sign.dart';
 import 'package:dio/dio.dart';
 
-class UserHttp {
+abstract final class UserHttp {
   static Future<dynamic> userStat({required int mid}) async {
     var res = await Request().get(Api.userStat, queryParameters: {'vmid': mid});
     if (res.data['code'] == 0) {
diff --git a/lib/http/validate.dart b/lib/http/validate.dart
index 69530ca0f..bbc5f30c9 100644
--- a/lib/http/validate.dart
+++ b/lib/http/validate.dart
@@ -3,7 +3,7 @@ import 'package:PiliPlus/http/init.dart';
 import 'package:PiliPlus/utils/accounts.dart';
 import 'package:dio/dio.dart';
 
-class ValidateHttp {
+abstract final class ValidateHttp {
   static Future gaiaVgateRegister(String vVoucher) async {
     final res = await Request().post(
       Api.gaiaVgateRegister,
diff --git a/lib/pages/about/view.dart b/lib/pages/about/view.dart
index a5b4b014a..f24e26a29 100644
--- a/lib/pages/about/view.dart
+++ b/lib/pages/about/view.dart
@@ -91,8 +91,11 @@ class _AboutPageState extends State<AboutPage> {
                   context: context,
                   builder: (context) {
                     return AlertDialog(
+                      constraints: StyleString.dialogFixedConstraints,
                       content: TextField(
                         autofocus: true,
+                        minLines: 1,
+                        maxLines: 4,
                         onSubmitted: (value) {
                           Get.back();
                           if (value.isNotEmpty) {
@@ -451,10 +454,7 @@ Future<void> showImportExportDialog<T>(
               builder: (context) {
                 return AlertDialog(
                   title: Text('输入$title'),
-                  constraints: const BoxConstraints(
-                    minWidth: 420,
-                    maxWidth: 420,
-                  ),
+                  constraints: StyleString.dialogFixedConstraints,
                   content: TextFormField(
                     key: key,
                     minLines: 4,
diff --git a/lib/pages/dynamics/widgets/vote.dart b/lib/pages/dynamics/widgets/vote.dart
index a174a91ef..d5bc61897 100644
--- a/lib/pages/dynamics/widgets/vote.dart
+++ b/lib/pages/dynamics/widgets/vote.dart
@@ -205,10 +205,6 @@ class _VotePanelState extends State<VotePanel> {
                         clipBehavior: .hardEdge,
                         title: const Text('关注的人的投票'),
                         contentPadding: const .only(top: 10, bottom: 12),
-                        constraints: const BoxConstraints(
-                          minWidth: 280,
-                          maxWidth: 420,
-                        ),
                         content: SingleChildScrollView(
                           child: Column(
                             mainAxisSize: .min,
diff --git a/lib/pages/fav_create/view.dart b/lib/pages/fav_create/view.dart
index 494c86ff9..bdb3752ec 100644
--- a/lib/pages/fav_create/view.dart
+++ b/lib/pages/fav_create/view.dart
@@ -191,9 +191,7 @@ class _CreateFavPageState extends State<CreateFavPage> {
                           builder: (_) {
                             return AlertDialog(
                               clipBehavior: Clip.hardEdge,
-                              contentPadding: const EdgeInsets.symmetric(
-                                vertical: 12,
-                              ),
+                              contentPadding: const .symmetric(vertical: 12),
                               content: Column(
                                 mainAxisSize: MainAxisSize.min,
                                 children: [
diff --git a/lib/pages/setting/models/extra_settings.dart b/lib/pages/setting/models/extra_settings.dart
index d5cc8b865..979d8bc31 100644
--- a/lib/pages/setting/models/extra_settings.dart
+++ b/lib/pages/setting/models/extra_settings.dart
@@ -426,7 +426,7 @@ List<SettingsModel> get extraSettings => [
     setKey: SettingBoxKey.continuePlayingPart,
     defaultVal: true,
   ),
-  getBanwordModel(
+  getBanWordModel(
     title: '评论关键词过滤',
     key: SettingBoxKey.banWordForReply,
     onChanged: (value) {
@@ -434,7 +434,7 @@ List<SettingsModel> get extraSettings => [
       ReplyGrpc.enableFilter = value.pattern.isNotEmpty;
     },
   ),
-  getBanwordModel(
+  getBanWordModel(
     title: '动态关键词过滤',
     key: SettingBoxKey.banWordForDyn,
     onChanged: (value) {
diff --git a/lib/pages/setting/models/model.dart b/lib/pages/setting/models/model.dart
index 6ab147e62..06ec1d5f3 100644
--- a/lib/pages/setting/models/model.dart
+++ b/lib/pages/setting/models/model.dart
@@ -1,3 +1,4 @@
+import 'package:PiliPlus/common/constants.dart';
 import 'package:PiliPlus/pages/setting/widgets/normal_item.dart';
 import 'package:PiliPlus/pages/setting/widgets/select_dialog.dart';
 import 'package:PiliPlus/pages/setting/widgets/switch_item.dart';
@@ -108,7 +109,7 @@ class SwitchModel extends SettingsModel {
   );
 }
 
-SettingsModel getBanwordModel({
+SettingsModel getBanWordModel({
   required String title,
   required String key,
   required ValueChanged<RegExp> onChanged,
@@ -119,10 +120,12 @@ SettingsModel getBanwordModel({
     title: title,
     getSubtitle: () => banWord.isEmpty ? "点击添加" : banWord,
     onTap: (context, setState) {
+      String editValue = banWord;
       showDialog(
         context: context,
         builder: (context) {
           return AlertDialog(
+            constraints: StyleString.dialogFixedConstraints,
             title: Text(title),
             content: Column(
               mainAxisSize: MainAxisSize.min,
@@ -131,11 +134,11 @@ SettingsModel getBanwordModel({
                 const Text('使用|隔开，如：尝试|测试'),
                 TextFormField(
                   autofocus: true,
-                  initialValue: banWord,
+                  initialValue: editValue,
                   textInputAction: TextInputAction.newline,
                   minLines: 1,
                   maxLines: 4,
-                  onChanged: (value) => banWord = value,
+                  onChanged: (value) => editValue = value,
                 ),
               ],
             ),
@@ -153,6 +156,7 @@ SettingsModel getBanwordModel({
                 child: const Text('保存'),
                 onPressed: () {
                   Get.back();
+                  banWord = editValue;
                   setState();
                   onChanged(RegExp(banWord, caseSensitive: false));
                   SmartDialog.showToast('已保存');
diff --git a/lib/pages/setting/models/recommend_settings.dart b/lib/pages/setting/models/recommend_settings.dart
index 4a86e6510..d60dd7089 100644
--- a/lib/pages/setting/models/recommend_settings.dart
+++ b/lib/pages/setting/models/recommend_settings.dart
@@ -55,7 +55,7 @@ List<SettingsModel> get recommendSettings => [
     values: [0, 1, 2, 3, 4],
     onChanged: (value) => RecommendFilter.minLikeRatioForRecommend = value,
   ),
-  getBanwordModel(
+  getBanWordModel(
     title: '标题关键词过滤',
     key: SettingBoxKey.banWordForRecommend,
     onChanged: (value) {
@@ -63,7 +63,7 @@ List<SettingsModel> get recommendSettings => [
       RecommendFilter.enableFilter = value.pattern.isNotEmpty;
     },
   ),
-  getBanwordModel(
+  getBanWordModel(
     title: 'App推荐/热门/排行榜: 视频分区关键词过滤',
     key: SettingBoxKey.banWordForZone,
     onChanged: (value) {
diff --git a/lib/pages/video/controller.dart b/lib/pages/video/controller.dart
index 49bca99a1..1f34d1553 100644
--- a/lib/pages/video/controller.dart
+++ b/lib/pages/video/controller.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:math' show min;
 import 'dart:ui';
 
+import 'package:PiliPlus/common/constants.dart';
 import 'package:PiliPlus/common/widgets/pair.dart';
 import 'package:PiliPlus/common/widgets/progress_bar/segment_progress_bar.dart';
 import 'package:PiliPlus/grpc/bilibili/app/listener/v1.pbenum.dart'
@@ -1942,7 +1943,7 @@ class VideoDetailController extends GetxController
     showDialog(
       context: Get.context!,
       builder: (context) => AlertDialog(
-        constraints: const BoxConstraints(maxWidth: 425, minWidth: 425),
+        constraints: StyleString.dialogFixedConstraints,
         title: const Text('播放地址'),
         content: Column(
           spacing: 20,
diff --git a/lib/pages/video/reply/widgets/reply_item_grpc.dart b/lib/pages/video/reply/widgets/reply_item_grpc.dart
index c49d414d2..b1798adf4 100644
--- a/lib/pages/video/reply/widgets/reply_item_grpc.dart
+++ b/lib/pages/video/reply/widgets/reply_item_grpc.dart
@@ -984,15 +984,8 @@ class ReplyItemGrpc extends StatelessWidget {
                 context: context,
                 builder: (context) {
                   return Dialog(
-                    constraints: const BoxConstraints(
-                      minWidth: 280,
-                      maxWidth: 425,
-                    ),
                     child: Padding(
-                      padding: const EdgeInsets.symmetric(
-                        horizontal: 20,
-                        vertical: 16,
-                      ),
+                      padding: const .symmetric(horizontal: 20, vertical: 16),
                       child: SelectableText(
                         message,
                         style: const TextStyle(fontSize: 15, height: 1.7),
diff --git a/lib/pages/video/widgets/header_control.dart b/lib/pages/video/widgets/header_control.dart
index 240a7ab41..ff1778888 100644
--- a/lib/pages/video/widgets/header_control.dart
+++ b/lib/pages/video/widgets/header_control.dart
@@ -1440,10 +1440,6 @@ class HeaderControlState extends State<HeaderControl>
         return AlertDialog(
           title: const Text('播放信息'),
           contentPadding: const EdgeInsets.only(top: 16),
-          constraints: const BoxConstraints(
-            minWidth: 280,
-            maxWidth: 425,
-          ),
           content: Material(
             type: MaterialType.transparency,
             child: ListTileTheme(
diff --git a/lib/utils/accounts.dart b/lib/utils/accounts.dart
index 6179e948b..03ee9c583 100644
--- a/lib/utils/accounts.dart
+++ b/lib/utils/accounts.dart
@@ -5,7 +5,7 @@ import 'package:PiliPlus/utils/accounts/account.dart';
 import 'package:PiliPlus/utils/login_utils.dart';
 import 'package:hive/hive.dart';
 
-abstract class Accounts {
+abstract final class Accounts {
   static late final Box<LoginAccount> account;
   static final List<Account> accountMode = List.filled(
     AccountType.values.length,
diff --git a/lib/utils/app_sign.dart b/lib/utils/app_sign.dart
index 518c671b0..8e8106324 100644
--- a/lib/utils/app_sign.dart
+++ b/lib/utils/app_sign.dart
@@ -3,7 +3,7 @@ import 'dart:convert';
 import 'package:PiliPlus/common/constants.dart';
 import 'package:crypto/crypto.dart';
 
-abstract class AppSign {
+abstract final class AppSign {
   static void appSign(
     Map<String, dynamic> params, {
     String appkey = Constants.appKey,
diff --git a/lib/utils/cache_manager.dart b/lib/utils/cache_manager.dart
index d4555eaf1..a8e327b1b 100644
--- a/lib/utils/cache_manager.dart
+++ b/lib/utils/cache_manager.dart
@@ -6,7 +6,7 @@ import 'package:PiliPlus/utils/platform_utils.dart';
 import 'package:PiliPlus/utils/storage_pref.dart';
 import 'package:path_provider/path_provider.dart';
 
-abstract class CacheManager {
+abstract final class CacheManager {
   // 获取缓存目录
   @pragma('vm:notify-debugger-on-exception')
   static Future<int> loadApplicationCache([
diff --git a/lib/utils/date_utils.dart b/lib/utils/date_utils.dart
index c9833ff82..66c24e0d9 100644
--- a/lib/utils/date_utils.dart
+++ b/lib/utils/date_utils.dart
@@ -1,6 +1,6 @@
 import 'package:intl/intl.dart' show DateFormat;
 
-abstract class DateFormatUtils {
+abstract final class DateFormatUtils {
   static final shortFormat = DateFormat('MM-dd');
   static final longFormat = DateFormat('yyyy-MM-dd');
   static final _shortFormatD = DateFormat('MM-dd HH:mm');
diff --git a/lib/utils/em.dart b/lib/utils/em.dart
index 5febcc82f..40a96dac1 100644
--- a/lib/utils/em.dart
+++ b/lib/utils/em.dart
@@ -1,4 +1,4 @@
-abstract class Em {
+abstract final class Em {
   static final _exp = RegExp('<[^>]*>([^<]*)</[^>]*>');
   static final _htmlRegExp = RegExp(r'&(lt|gt|quot|apos|nbsp|amp);');
 
diff --git a/lib/utils/fav_utils.dart b/lib/utils/fav_utils.dart
index 238c778d5..c01318181 100644
--- a/lib/utils/fav_utils.dart
+++ b/lib/utils/fav_utils.dart
@@ -1,4 +1,4 @@
-abstract class FavUtils {
+abstract final class FavUtils {
   static bool isDefaultFav(int? attr) {
     if (attr == null) {
       return false;
diff --git a/lib/utils/grid.dart b/lib/utils/grid.dart
index 2764866f7..b41caa482 100644
--- a/lib/utils/grid.dart
+++ b/lib/utils/grid.dart
@@ -16,7 +16,7 @@ mixin GridMixin<T extends StatefulWidget> on State<T> {
   );
 }
 
-abstract class Grid {
+abstract final class Grid {
   static final double smallCardWidth = Pref.smallCardWidth;
 
   static SliverGridDelegateWithExtentAndRatio videoCardHDelegate(
diff --git a/lib/utils/id_utils.dart b/lib/utils/id_utils.dart
index 6ed01486b..5166593ed 100644
--- a/lib/utils/id_utils.dart
+++ b/lib/utils/id_utils.dart
@@ -5,7 +5,7 @@ import 'dart:convert';
 import 'package:PiliPlus/utils/utils.dart';
 import 'package:uuid/v4.dart';
 
-abstract class IdUtils {
+abstract final class IdUtils {
   static const XOR_CODE = 23442827791579;
   static const MASK_CODE = 2251799813685247;
   static const MAX_AID = 1 << 51;
diff --git a/lib/utils/image_utils.dart b/lib/utils/image_utils.dart
index 05ffff1ad..398c26323 100644
--- a/lib/utils/image_utils.dart
+++ b/lib/utils/image_utils.dart
@@ -21,7 +21,7 @@ import 'package:live_photo_maker/live_photo_maker.dart';
 import 'package:saver_gallery/saver_gallery.dart';
 import 'package:share_plus/share_plus.dart';
 
-abstract class ImageUtils {
+abstract final class ImageUtils {
   static String get time =>
       DateFormat('yyyy-MM-dd_HH-mm-ss').format(DateTime.now());
   static bool silentDownImg = Pref.silentDownImg;
diff --git a/lib/utils/page_utils.dart b/lib/utils/page_utils.dart
index 20cd4ec0a..2d5eca8f0 100644
--- a/lib/utils/page_utils.dart
+++ b/lib/utils/page_utils.dart
@@ -35,7 +35,7 @@ import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart' hide ContextExtensionss;
 import 'package:url_launcher/url_launcher.dart';
 
-abstract class PageUtils {
+abstract final class PageUtils {
   static final RouteObserver<PageRoute> routeObserver =
       RouteObserver<PageRoute>();
 
diff --git a/lib/utils/recommend_filter.dart b/lib/utils/recommend_filter.dart
index 756c3d0ab..4239342bf 100644
--- a/lib/utils/recommend_filter.dart
+++ b/lib/utils/recommend_filter.dart
@@ -1,7 +1,7 @@
 import 'package:PiliPlus/models/model_video.dart';
 import 'package:PiliPlus/utils/storage_pref.dart';
 
-class RecommendFilter {
+abstract final class RecommendFilter {
   static int minDurationForRcmd = Pref.minDurationForRcmd;
   static int minPlayForRcmd = Pref.minPlayForRcmd;
   static int minLikeRatioForRecommend = Pref.minLikeRatioForRecommend;
diff --git a/lib/utils/reply_utils.dart b/lib/utils/reply_utils.dart
index 4d19cb32c..475b06512 100644
--- a/lib/utils/reply_utils.dart
+++ b/lib/utils/reply_utils.dart
@@ -17,7 +17,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart';
 
-class ReplyUtils {
+abstract final class ReplyUtils {
   static void onCheckReply({
     required ReplyInfo replyInfo,
     required bool biliSendCommAntifraud,
diff --git a/lib/utils/storage.dart b/lib/utils/storage.dart
index 8986adb85..dc0b77cc3 100644
--- a/lib/utils/storage.dart
+++ b/lib/utils/storage.dart
@@ -13,7 +13,7 @@ import 'package:PiliPlus/utils/utils.dart';
 import 'package:hive_flutter/hive_flutter.dart';
 import 'package:path/path.dart' as path;
 
-abstract class GStorage {
+abstract final class GStorage {
   static late final Box<UserInfoData> userInfo;
   static late final Box<dynamic> historyWord;
   static late final Box<dynamic> localCache;
diff --git a/lib/utils/storage_key.dart b/lib/utils/storage_key.dart
index 030e34745..41f83d211 100644
--- a/lib/utils/storage_key.dart
+++ b/lib/utils/storage_key.dart
@@ -1,6 +1,6 @@
 // ignore_for_file: constant_identifier_names
 
-abstract class SettingBoxKey {
+abstract final class SettingBoxKey {
   static const String btmProgressBehavior = 'btmProgressBehavior',
       defaultVideoQa = 'defaultVideoQa',
       defaultVideoQaCellular = 'defaultVideoQaCellular',
@@ -224,7 +224,7 @@ abstract class SettingBoxKey {
       liveCdnUrl = 'liveCdnUrl';
 }
 
-abstract class LocalCacheKey {
+abstract final class LocalCacheKey {
   static const String historyPause = 'historyPause',
       blackMids = 'blackMids',
       danmakuFilterRules = 'danmakuFilterRules',
@@ -233,7 +233,7 @@ abstract class LocalCacheKey {
       buvid = 'buvid';
 }
 
-abstract class VideoBoxKey {
+abstract final class VideoBoxKey {
   static const String playRepeat = 'playRepeat',
       playSpeedDefault = 'playSpeedDefault',
       longPressSpeedDefault = 'longPressSpeedDefault',
diff --git a/lib/utils/storage_pref.dart b/lib/utils/storage_pref.dart
index e2ebb0957..2f2b48831 100644
--- a/lib/utils/storage_pref.dart
+++ b/lib/utils/storage_pref.dart
@@ -37,7 +37,7 @@ import 'package:get/get.dart' hide ContextExtensionss;
 import 'package:hive/hive.dart';
 import 'package:uuid/uuid.dart';
 
-abstract class Pref {
+abstract final class Pref {
   static final Box _setting = GStorage.setting;
   static final Box _video = GStorage.video;
   static final Box _localCache = GStorage.localCache;
diff --git a/lib/utils/theme_utils.dart b/lib/utils/theme_utils.dart
index 2614611a7..103be2951 100644
--- a/lib/utils/theme_utils.dart
+++ b/lib/utils/theme_utils.dart
@@ -5,7 +5,7 @@ import 'package:PiliPlus/utils/storage_pref.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
-abstract class ThemeUtils {
+abstract final class ThemeUtils {
   static ThemeData getThemeData({
     required ColorScheme colorScheme,
     required bool isDynamic,
@@ -91,6 +91,7 @@ abstract class ThemeUtils {
           fontWeight: fontWeight,
         ),
         backgroundColor: colorScheme.surface,
+        constraints: const BoxConstraints(minWidth: 280, maxWidth: 420),
       ),
       bottomSheetTheme: BottomSheetThemeData(
         backgroundColor: colorScheme.surface,
diff --git a/lib/utils/update.dart b/lib/utils/update.dart
index 308b9e96a..63b345d84 100644
--- a/lib/utils/update.dart
+++ b/lib/utils/update.dart
@@ -15,7 +15,7 @@ import 'package:flutter/foundation.dart' show kDebugMode;
 import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 
-abstract class Update {
+abstract final class Update {
   // 检查更新
   static Future<void> checkUpdate([bool isAuto = true]) async {
     if (kDebugMode) return;
diff --git a/lib/utils/url_utils.dart b/lib/utils/url_utils.dart
index a6155bf99..67f9fce9a 100644
--- a/lib/utils/url_utils.dart
+++ b/lib/utils/url_utils.dart
@@ -8,7 +8,7 @@ import 'package:flutter/foundation.dart' show kDebugMode;
 import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 
-abstract class UrlUtils {
+abstract final class UrlUtils {
   // 302重定向路由截取
   static Future<String?> parseRedirectUrl(
     String url, [
diff --git a/lib/utils/utils.dart b/lib/utils/utils.dart
index fa613bcfa..d4c050a11 100644
--- a/lib/utils/utils.dart
+++ b/lib/utils/utils.dart
@@ -14,7 +14,7 @@ import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart';
 import 'package:share_plus/share_plus.dart';
 
-abstract class Utils {
+abstract final class Utils {
   static final random = Random();
 
   static const channel = MethodChannel(Constants.appName);
diff --git a/lib/utils/wbi_sign.dart b/lib/utils/wbi_sign.dart
index 8ab53b7ec..bd6e76d09 100644
--- a/lib/utils/wbi_sign.dart
+++ b/lib/utils/wbi_sign.dart
@@ -13,7 +13,7 @@ import 'package:crypto/crypto.dart';
 import 'package:hive/hive.dart';
 import 'package:synchronized/synchronized.dart';
 
-abstract class WbiSign {
+abstract final class WbiSign {
   static Box localCache = GStorage.localCache;
   static final Lock lock = Lock();
   static final RegExp chrFilter = RegExp(r"[!\'\(\)\*]");