fix(mobile): type direct feedback switch event

mobile-uni/src/pages/user/direct/index.vue

@@ -55,7 +55,7 @@
               :checked="form.anonymous"
               color="#c91825"
               aria-label="匿名提交"
-              @change="form.anonymous = Boolean($event.detail.value)"
+              @change="changeAnonymous"
             />
             <view>
               <text class="anonymous-title">匿名提交</text>
@@ -167,6 +167,10 @@ const chooseChannel = (channel: DirectChannel) => {
   form.anonymous = channel.defaultAnonymous;
 };
 
+const changeAnonymous = (event: Event | { detail?: { value?: boolean } }) => {
+  form.anonymous = Boolean('detail' in event ? event.detail?.value : false);
+};
+
 const loadChannels = async () => {
   channels.value = await listDirectChannels();
   if (!form.channelCode && channels.value.length) chooseChannel(channels.value[0]);