opt: func

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/whisper_detail/controller.dart

@@ -61,7 +61,7 @@ class WhisperDetailController
   }
 
   // 消息标记已读
-  Future ackSessionMsg(int? msgSeqno) async {
+  Future<void> ackSessionMsg(int? msgSeqno) async {
     var res = await MsgHttp.ackSessionMsg(
       talkerId: talkerId,
       ackSeqno: msgSeqno,
@@ -71,7 +71,7 @@ class WhisperDetailController
     }
   }
 
-  Future sendMsg({
+  Future<void> sendMsg({
     required String message,
     Map? picMsg,
     required VoidCallback onClearText,

lib/pages/whisper_detail/view.dart

@@ -321,7 +321,7 @@ class _WhisperDetailPageState
   Widget? get customPanel => EmotePanel(onChoose: onChooseEmote);
 
   @override
-  Future onCustomPublish({required String message, List? pictures}) {
+  Future<void> onCustomPublish({required String message, List? pictures}) {
     throw UnimplementedError();
   }
 }