fix:修改会话布局；

src/components/AppMessage/index.vue

@@ -17,7 +17,7 @@ const props = defineProps({
   },
   height: {
     type: String,
-    default: '100%',
+    default: 'calc(100% - 120px)',
   },
   list: {
     type: Array as PropType<MessageItem[]>,
@@ -178,7 +178,7 @@ onMounted(async () => {
 
 <style lang="scss" scoped>
 @include app('message') {
-  max-height: v-bind(height);
+  height: v-bind(height);
   overflow: auto;
   box-sizing: border-box;
   :deep(.md-editor-preview) {