diff --git a/lib/grpc/grpc_repo.dart b/lib/grpc/grpc_repo.dart
index d9c02232f..fed740fca 100644
--- a/lib/grpc/grpc_repo.dart
+++ b/lib/grpc/grpc_repo.dart
@@ -45,9 +45,6 @@ class GrpcUrl {
 }
 
 class GrpcRepo {
-  static const gzipEncoder = GZipEncoder();
-  static const gzipDecoder = GZipDecoder();
-
   static final String? _accessKey = Accounts.main.accessKey;
   static const _build = 1462100;
   static const _biliChannel = 'bili';
@@ -124,21 +121,19 @@ class GrpcRepo {
   static final unprintableRegExp = RegExp(r"[^\u4e00-\u9fa5，。；！？UP]");
 
   static Uint8List compressProtobuf(Uint8List proto) {
-    proto = gzipEncoder.encodeBytes(proto, level: 0);
-    var byteLength = ByteData(4);
-    byteLength.setInt32(0, proto.length, Endian.big);
-    var compressed = Uint8List(5 + proto.length);
-    compressed[0] = 1;
-    compressed.setRange(1, 5, byteLength.buffer.asUint8List());
-    compressed.setAll(5, proto);
-    return compressed;
+    proto = const GZipEncoder().encodeBytes(proto);
+    var byteLength = ByteData(4)..setInt32(0, proto.length, Endian.big);
+    return Uint8List(5 + proto.length)
+      ..[0] = 1
+      ..setRange(1, 5, byteLength.buffer.asUint8List())
+      ..setAll(5, proto);
   }
 
   static Uint8List decompressProtobuf(Uint8List data) {
     var length = ByteData.sublistView(data, 1, 5).getInt32(0, Endian.big);
 
     if (data[0] == 1) {
-      return gzipDecoder.decodeBytes(data.sublist(5, length + 5));
+      return const GZipDecoder().decodeBytes(data.sublist(5, length + 5));
     } else {
       return data.sublist(5, length + 5);
     }
diff --git a/lib/http/loading_state.dart b/lib/http/loading_state.dart
index 82befbe67..c19e92e89 100644
--- a/lib/http/loading_state.dart
+++ b/lib/http/loading_state.dart
@@ -14,6 +14,11 @@ sealed class LoadingState<T> {
         Error() => throw this,
         Loading() => throw Exception('ApiException: loading'),
       };
+
+  T? get dataOrNull => switch (this) {
+        Success(response: final res) => res,
+        _ => null,
+      };
 }
 
 class Loading extends LoadingState<Never> {
diff --git a/lib/pages/bangumi/controller.dart b/lib/pages/bangumi/controller.dart
index 5c04d3877..d5e785460 100644
--- a/lib/pages/bangumi/controller.dart
+++ b/lib/pages/bangumi/controller.dart
@@ -102,9 +102,7 @@ class BangumiController extends CommonListController<
         followState.value = LoadingState.success(list);
         followController?.animToTop();
       } else if (followState.value is Success) {
-        List<BangumiListItemModel> currentList =
-            (followState.value as Success).response;
-        currentList.addAll(list!);
+        final currentList = followState.value.data!..addAll(list!);
         if (currentList.length >= followCount.value) {
           followEnd = true;
         }
diff --git a/lib/pages/blacklist/controller.dart b/lib/pages/blacklist/controller.dart
index fb4fc185e..896b44ce4 100644
--- a/lib/pages/blacklist/controller.dart
+++ b/lib/pages/blacklist/controller.dart
@@ -45,8 +45,7 @@ class BlackListController
       onConfirm: () async {
         var result = await VideoHttp.relationMod(mid: mid, act: 6, reSrc: 11);
         if (result['status']) {
-          List<BlackListItem> list = (loadingState.value as Success).response;
-          list.removeAt(index);
+          loadingState.value.data!.removeAt(index);
           total.value -= 1;
           loadingState.refresh();
           SmartDialog.showToast('操作成功');
diff --git a/lib/pages/common/common_controller.dart b/lib/pages/common/common_controller.dart
index 4da358725..140b1c778 100644
--- a/lib/pages/common/common_controller.dart
+++ b/lib/pages/common/common_controller.dart
@@ -64,8 +64,7 @@ abstract class CommonController<R, T> extends GetxController
           checkIsEnd(dataList.length);
           loadingState.value = LoadingState<List<T>?>.success(dataList);
         } else if (loadingState.value is Success) {
-          List<T> list = (loadingState.value as Success).response;
-          list.addAll(dataList);
+          final list = (loadingState.value.data! as List<T>)..addAll(dataList);
           checkIsEnd(list.length);
           loadingState.refresh();
         }
diff --git a/lib/pages/dynamics_tab/controller.dart b/lib/pages/dynamics_tab/controller.dart
index fefc0f6d6..8bb2e99bc 100644
--- a/lib/pages/dynamics_tab/controller.dart
+++ b/lib/pages/dynamics_tab/controller.dart
@@ -54,8 +54,7 @@ class DynamicsTabController
   Future onRemove(dynamic dynamicId) async {
     var res = await MsgHttp.removeDynamic(dynIdStr: dynamicId);
     if (res['status']) {
-      List<DynamicItemModel> list = (loadingState.value as Success).response;
-      list.removeWhere((item) => item.idStr == dynamicId);
+      loadingState.value.data!.removeWhere((item) => item.idStr == dynamicId);
       loadingState.refresh();
       SmartDialog.showToast('删除成功');
     } else {
diff --git a/lib/pages/fan/controller.dart b/lib/pages/fan/controller.dart
index 54e2aa764..e0c11f012 100644
--- a/lib/pages/fan/controller.dart
+++ b/lib/pages/fan/controller.dart
@@ -38,8 +38,7 @@ class FansController
       reSrc: 11,
     );
     if (res['status']) {
-      List<FansItemModel> list = (loadingState.value as Success).response;
-      list.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
       SmartDialog.showToast('移除成功');
     } else {
diff --git a/lib/pages/fav/article/controller.dart b/lib/pages/fav/article/controller.dart
index 54608d6f2..f96df9d50 100644
--- a/lib/pages/fav/article/controller.dart
+++ b/lib/pages/fav/article/controller.dart
@@ -30,8 +30,7 @@ class FavArticleController extends CommonListController {
   Future<void> onRemove(index, id) async {
     final res = await UserHttp.communityAction(opusId: id, action: 4);
     if (res['status']) {
-      List list = (loadingState.value as Success).response;
-      list.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
       SmartDialog.showToast('已取消收藏');
     } else {
diff --git a/lib/pages/fav/pgc/controller.dart b/lib/pages/fav/pgc/controller.dart
index 5d5552345..24cd8a418 100644
--- a/lib/pages/fav/pgc/controller.dart
+++ b/lib/pages/fav/pgc/controller.dart
@@ -57,9 +57,7 @@ class FavPgcController
   Future bangumiDel(index, seasonId) async {
     var result = await VideoHttp.bangumiDel(seasonId: seasonId);
     if (result['status']) {
-      List<BangumiListItemModel> list =
-          (loadingState.value as Success).response;
-      list.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
     }
     SmartDialog.showToast(result['msg']);
@@ -82,9 +80,8 @@ class FavPgcController
       try {
         final ctr = Get.find<FavPgcController>(tag: '$type$followStatus');
         if (ctr.loadingState.value is Success) {
-          List<BangumiListItemModel> list =
-              (ctr.loadingState.value as Success).response;
-          list.insertAll(0, updateList.map((item) => item..checked = null));
+          ctr.loadingState.value.data!
+              .insertAll(0, updateList.map((item) => item..checked = null));
           ctr.loadingState.refresh();
           ctr.allSelected.value = false;
         }
@@ -108,9 +105,7 @@ class FavPgcController
       try {
         final ctr = Get.find<FavPgcController>(tag: '$type$followStatus');
         if (ctr.loadingState.value is Success) {
-          List<BangumiListItemModel> list =
-              (ctr.loadingState.value as Success).response;
-          list.insert(0, item);
+          ctr.loadingState.value.data!.insert(0, item);
           ctr.loadingState.refresh();
           ctr.allSelected.value = false;
         }
diff --git a/lib/pages/fav/video/view.dart b/lib/pages/fav/video/view.dart
index 96307926b..ebc817874 100644
--- a/lib/pages/fav/video/view.dart
+++ b/lib/pages/fav/video/view.dart
@@ -85,10 +85,7 @@ class _FavVideoPageState extends State<FavVideoPage>
                         },
                       );
                       if (res == true) {
-                        List<FavFolderItemData> list =
-                            (_favController.loadingState.value as Success)
-                                .response;
-                        list.removeAt(index);
+                        _favController.loadingState.value.data!.removeAt(index);
                         _favController.loadingState.refresh();
                       }
                     },
diff --git a/lib/pages/fav_search/controller.dart b/lib/pages/fav_search/controller.dart
index 6e9f11bcd..09281f194 100644
--- a/lib/pages/fav_search/controller.dart
+++ b/lib/pages/fav_search/controller.dart
@@ -45,9 +45,7 @@ class FavSearchController
       type: type,
     );
     if (result['status']) {
-      List<FavDetailItemData> dataList =
-          (loadingState.value as Success).response;
-      dataList.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
       SmartDialog.showToast('取消收藏');
     }
diff --git a/lib/pages/history_search/controller.dart b/lib/pages/history_search/controller.dart
index d7068bc0d..8af46451d 100644
--- a/lib/pages/history_search/controller.dart
+++ b/lib/pages/history_search/controller.dart
@@ -27,8 +27,7 @@ class HistorySearchController
 
     var res = await UserHttp.delHistory([resKid]);
     if (res['status']) {
-      List historyList = (loadingState.value as Success).response;
-      historyList.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
       SmartDialog.showToast(res['msg']);
     }
diff --git a/lib/pages/later/controller.dart b/lib/pages/later/controller.dart
index ed1689d92..a52969c4d 100644
--- a/lib/pages/later/controller.dart
+++ b/lib/pages/later/controller.dart
@@ -105,9 +105,7 @@ class LaterController extends MultiSelectController<Map, HotVideoItemModel> {
                 Get.back();
                 var res = await UserHttp.toViewDel(aids: [aid]);
                 if (res['status']) {
-                  List<HotVideoItemModel> list =
-                      (loadingState.value as Success).response;
-                  list.removeAt(index);
+                  loadingState.value.data!.removeAt(index);
                   baseCtr.counts[laterViewType] =
                       baseCtr.counts[laterViewType]! - 1;
                   loadingState.refresh();
diff --git a/lib/pages/later_search/controller.dart b/lib/pages/later_search/controller.dart
index a5c4590a3..0b8f8acd6 100644
--- a/lib/pages/later_search/controller.dart
+++ b/lib/pages/later_search/controller.dart
@@ -1,7 +1,7 @@
 import 'package:PiliPlus/http/loading_state.dart';
+import 'package:PiliPlus/http/user.dart';
 import 'package:PiliPlus/models/model_hot_video_item.dart';
 import 'package:PiliPlus/pages/common/common_search_controller.dart';
-import 'package:PiliPlus/http/user.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart';
@@ -25,8 +25,7 @@ class LaterSearchController
   Future toViewDel(BuildContext context, int index, aid) async {
     var res = await UserHttp.toViewDel(aids: [aid]);
     if (res['status']) {
-      List<HotVideoItemModel> list = (loadingState.value as Success).response;
-      list.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
     }
     SmartDialog.showToast(res['msg']);
diff --git a/lib/pages/live/controller.dart b/lib/pages/live/controller.dart
index 0b6a8698c..e82a3f0f8 100644
--- a/lib/pages/live/controller.dart
+++ b/lib/pages/live/controller.dart
@@ -59,7 +59,8 @@ class LiveController
   }
 
   late RxBool isLogin = Accounts.main.isLogin.obs;
-  late Rx<LoadingState> followListState = LoadingState.loading().obs;
+  late Rx<LoadingState<List<LiveFollowingItemModel>?>> followListState =
+      Rx(LoadingState.loading());
   late int followPage = 1;
   late bool followEnd = false;
   late RxInt liveCount = 0.obs;
@@ -93,9 +94,8 @@ class LiveController
         }
         followListState.value = LoadingState.success(dataList);
       } else if (followListState.value is Success) {
-        List<LiveFollowingItemModel> list =
-            (followListState.value as Success).response;
-        list.addAll(dataList!);
+        List<LiveFollowingItemModel> list = followListState.value.data!
+          ..addAll(dataList!);
         if (list.length >= liveCount.value) {
           followEnd = true;
         }
diff --git a/lib/pages/member_dynamics/controller.dart b/lib/pages/member_dynamics/controller.dart
index adc9612cd..a408dc3ab 100644
--- a/lib/pages/member_dynamics/controller.dart
+++ b/lib/pages/member_dynamics/controller.dart
@@ -59,8 +59,7 @@ class MemberDynamicsController
   Future onRemove(dynamicId) async {
     var res = await MsgHttp.removeDynamic(dynIdStr: dynamicId);
     if (res['status']) {
-      List<DynamicItemModel> list = (loadingState.value as Success).response;
-      list.removeWhere((item) => item.idStr == dynamicId);
+      loadingState.value.data!.removeWhere((item) => item.idStr == dynamicId);
       loadingState.refresh();
       SmartDialog.showToast('删除成功');
     } else {
diff --git a/lib/pages/member_search/controller.dart b/lib/pages/member_search/controller.dart
index 53d36d897..dbda3581d 100644
--- a/lib/pages/member_search/controller.dart
+++ b/lib/pages/member_search/controller.dart
@@ -105,9 +105,8 @@ class MemberSearchController extends GetxController
         }
         dynamicState.value = LoadingState.success(items);
       } else if (dynamicState.value is Success) {
-        List<DynamicItemModel> currentList =
-            (dynamicState.value as Success).response;
-        currentList.addAll(items!);
+        List<DynamicItemModel> currentList = dynamicState.value.data!
+          ..addAll(items!);
         if (currentList.length >= dynamicCount.value) {
           isEndDynamic = true;
         }
@@ -147,9 +146,8 @@ class MemberSearchController extends GetxController
         }
         archiveState.value = LoadingState.success(vlist);
       } else if (archiveState.value is Success) {
-        List<VListItemModel> currentList =
-            (archiveState.value as Success).response;
-        currentList.addAll(vlist!);
+        List<VListItemModel> currentList = archiveState.value.data!
+          ..addAll(vlist!);
         if (currentList.length >= archiveCount.value) {
           isEndArchive = true;
         }
diff --git a/lib/pages/msg_feed_top/at_me/controller.dart b/lib/pages/msg_feed_top/at_me/controller.dart
index df1cdb5ab..2e574a315 100644
--- a/lib/pages/msg_feed_top/at_me/controller.dart
+++ b/lib/pages/msg_feed_top/at_me/controller.dart
@@ -45,8 +45,7 @@ class AtMeController extends CommonListController<MsgFeedAtMe, AtMeItems> {
     try {
       var res = await MsgHttp.delMsgfeed(2, id);
       if (res['status']) {
-        List<AtMeItems> list = (loadingState.value as Success).response;
-        list.removeAt(index);
+        loadingState.value.data!.removeAt(index);
         loadingState.refresh();
         SmartDialog.showToast('删除成功');
       } else {
diff --git a/lib/pages/msg_feed_top/reply_me/controller.dart b/lib/pages/msg_feed_top/reply_me/controller.dart
index 332dd62cc..c6f1d86d8 100644
--- a/lib/pages/msg_feed_top/reply_me/controller.dart
+++ b/lib/pages/msg_feed_top/reply_me/controller.dart
@@ -46,8 +46,7 @@ class ReplyMeController
     try {
       var res = await MsgHttp.delMsgfeed(1, id);
       if (res['status']) {
-        List<ReplyMeItems> list = (loadingState.value as Success).response;
-        list.removeAt(index);
+        loadingState.value.data!.removeAt(index);
         loadingState.refresh();
         SmartDialog.showToast('删除成功');
       } else {
diff --git a/lib/pages/msg_feed_top/sys_msg/controller.dart b/lib/pages/msg_feed_top/sys_msg/controller.dart
index a3d6561d8..b38622d86 100644
--- a/lib/pages/msg_feed_top/sys_msg/controller.dart
+++ b/lib/pages/msg_feed_top/sys_msg/controller.dart
@@ -43,8 +43,7 @@ class SysMsgController
     try {
       var res = await MsgHttp.delSysMsg(id);
       if (res['status']) {
-        List<SystemNotifyList> list = (loadingState.value as Success).response;
-        list.removeAt(index);
+        loadingState.value.data!.removeAt(index);
         loadingState.refresh();
         SmartDialog.showToast('删除成功');
       } else {
diff --git a/lib/pages/subscription/controller.dart b/lib/pages/subscription/controller.dart
index 67174aadc..6fe57396e 100644
--- a/lib/pages/subscription/controller.dart
+++ b/lib/pages/subscription/controller.dart
@@ -49,9 +49,7 @@ class SubController
               var res = await UserHttp.cancelSub(
                   id: subFolderItem.id!, type: subFolderItem.type!);
               if (res['status']) {
-                List<SubFolderItemData> list =
-                    (loadingState.value as Success).response;
-                list.remove(subFolderItem);
+                loadingState.value.data!.remove(subFolderItem);
                 loadingState.refresh();
                 SmartDialog.showToast('取消订阅成功');
               } else {
diff --git a/lib/pages/video/reply_reply/view.dart b/lib/pages/video/reply_reply/view.dart
index ebbede3f7..4c34a63ae 100644
--- a/lib/pages/video/reply_reply/view.dart
+++ b/lib/pages/video/reply_reply/view.dart
@@ -360,12 +360,8 @@ class _VideoReplyReplyPanelState
       if (res != null) {
         _savedReplies[key] = null;
         ReplyInfo replyInfo = RequestUtils.replyCast(res);
-        List<ReplyInfo> list =
-            _videoReplyReplyController.loadingState.value is Success
-                ? (_videoReplyReplyController.loadingState.value as Success)
-                    .response
-                : <ReplyInfo>[];
-        list.insert(index + 1, replyInfo);
+        _videoReplyReplyController.loadingState.value.dataOrNull
+            ?.insert(index + 1, replyInfo);
         _videoReplyReplyController.count.value += 1;
         _videoReplyReplyController.loadingState.refresh();
         if (_videoReplyReplyController.enableCommAntifraud && mounted) {
@@ -462,9 +458,7 @@ class _VideoReplyReplyPanelState
         _onReply(replyItem, index);
       },
       onDelete: (subIndex) {
-        List<ReplyInfo> list =
-            (_videoReplyReplyController.loadingState.value as Success).response;
-        list.removeAt(index);
+        _videoReplyReplyController.loadingState.value.data!.removeAt(index);
         _videoReplyReplyController.count.value -= 1;
         _videoReplyReplyController.loadingState.refresh();
       },
diff --git a/lib/pages/whisper/controller.dart b/lib/pages/whisper/controller.dart
index f07b4b048..873167d1c 100644
--- a/lib/pages/whisper/controller.dart
+++ b/lib/pages/whisper/controller.dart
@@ -85,8 +85,7 @@ class WhisperController
       if (isRefresh) {
         loadingState.value = LoadingState<List<SessionList>?>.success(dataList);
       } else if (loadingState.value is Success) {
-        List<SessionList> list = (loadingState.value as Success).response;
-        list.addAll(dataList);
+        loadingState.value.data!.addAll(dataList);
         loadingState.refresh();
       }
     });
@@ -103,8 +102,7 @@ class WhisperController
   Future onRemove(int index, int? talkerId) async {
     var res = await MsgHttp.removeMsg(talkerId);
     if (res['status']) {
-      List<SessionList> list = (loadingState.value as Success).response;
-      list.removeAt(index);
+      loadingState.value.data!.removeAt(index);
       loadingState.refresh();
       SmartDialog.showToast('删除成功');
     } else {
diff --git a/lib/services/audio_handler.dart b/lib/services/audio_handler.dart
index 93c6c9f35..014b91819 100644
--- a/lib/services/audio_handler.dart
+++ b/lib/services/audio_handler.dart
@@ -209,7 +209,9 @@ class VideoPlayerServiceHandler extends BaseAudioHandler with SeekHandler {
   void onPositionChange(Duration position) {
     if (!enableBackgroundPlay ||
         _item.isEmpty ||
-        PlPlayerController.instanceExists().not) return;
+        PlPlayerController.instanceExists().not) {
+      return;
+    }
 
     playbackState.add(playbackState.value.copyWith(
       updatePosition: position,
diff --git a/lib/utils/extension.dart b/lib/utils/extension.dart
index 64bede94b..2431b7120 100644
--- a/lib/utils/extension.dart
+++ b/lib/utils/extension.dart
@@ -108,10 +108,9 @@ extension BuildContextExt on BuildContext {
 
 extension Unique<E, Id> on List<E> {
   List<E> unique([Id Function(E element)? id, bool inplace = true]) {
-    final ids = <dynamic>{};
-    var list = inplace ? this : List<E>.from(this);
-    list.retainWhere((x) => ids.add(id != null ? id(x) : x as Id));
-    return list;
+    final ids = <Id>{};
+    return (inplace ? this : List<E>.from(this))
+      ..retainWhere((x) => ids.add(id != null ? id(x) : x as Id));
   }
 }