style: 将日历中日期的"今天"和"昨天"改为"今日"和"昨日"

 <!--
  * @Date: 2025-11-19 21:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-12-02 22:05:04
+ * @LastEditTime: 2025-12-02 22:28:25
  * @FilePath: /mlaj/src/views/teacher/taskHomePage.vue
  * @Description: 教师端作业主页（头部介绍、统计、日历与学生完成情况；数据Mock）
 -->
@@ -171,10 +171,10 @@ const formatter = (day) => {
 
     if (dateStr === todayStr) {
         day.className = 'calendar-today';
-        day.bottomInfo = '今天'
+        day.bottomInfo = '今日'
     } else if (dateStr === yesterdayStr) {
         day.className = 'calendar-yesterday';
-        day.bottomInfo = '昨天'
+        day.bottomInfo = '昨日'
     }
 
     return day