fix ui.

src/oj/submission/list.vue

@@ -255,7 +255,7 @@ const columns = computed(() => {
           <n-button @click="search(query.username)">搜索</n-button>
         </n-form-item>
         <n-form-item>
-          <n-button @click="clear">重置</n-button>
+          <n-button @click="clear" quaternary>重置</n-button>
         </n-form-item>
       </n-form>
     </n-space>