opt: 代码优化

lib/common/widgets/content_container.dart

@@ -34,7 +34,7 @@ class ContentContainer extends StatelessWidget {
                       child: contentWidget!,
                     )
                   else
-                    Spacer(),
+                    const Spacer(),
                   if (bottomWidget != null) bottomWidget!,
                 ],
               ),

lib/http/html.dart

@@ -15,7 +15,7 @@ class HtmlHttp {
       Match match = regex.firstMatch(response.data)!;
       String matchedString = match.group(0)!;
       response = await Request().get(
-        'https:$matchedString' + '/',
+        'https:$matchedString/',
         extra: {'ua': 'pc'},
       );
     }

lib/http/init.dart

@@ -6,7 +6,7 @@ import 'package:cookie_jar/cookie_jar.dart';
 import 'package:dio/dio.dart';
 import 'package:dio/io.dart';
 import 'package:dio_cookie_manager/dio_cookie_manager.dart';
-import 'package:dio_http2_adapter/dio_http2_adapter.dart';
+// import 'package:dio_http2_adapter/dio_http2_adapter.dart';
 import 'package:hive/hive.dart';
 import '../utils/storage.dart';
 import '../utils/utils.dart';

lib/pages/whisper/view.dart

@@ -210,11 +210,11 @@ class _WhisperPageState extends State<WhisperPage> {
                             );
                           } else {
                             // 请求错误
-                            return SizedBox();
+                            return const SizedBox();
                           }
                         } else {
                           // 骨架屏
-                          return SizedBox();
+                          return const SizedBox();
                         }
                       },
                     )

lib/utils/wbi_sign.dart

@@ -80,7 +80,7 @@ class WbiSign {
   String getMixinKey(String orig) {
     String temp = '';
     for (int i = 0; i < mixinKeyEncTab.length; i++) {
-      temp += orig.split('')[mixinKeyEncTab[i] as int];
+      temp += orig.split('')[mixinKeyEncTab[i]];
     }
     return temp.substring(0, 32);
   }