fix(booking): 修复日期选择逻辑和周历显示不全的问题

修复日期选择时未检查date存在导致的潜在错误
补全周历显示不足7天时的空日期项

 <!--
  * @Date: 2024-01-15 13:35:51
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2026-01-07 23:18:29
+ * @LastEditTime: 2026-01-13 14:15:29
  * @FilePath: /xyxBooking-weapp/src/pages/booking/index.vue
  * @Description: 预约页面
 -->
@@ -21,8 +21,8 @@
             <view v-for="(date, dateIndex) in week" :key="dateIndex"
               @tap="chooseDay(date)"
               :class="[ 'item',
-                checked_day === findDatesInfo(date).date ? 'checked' : '',
-                findDatesInfo(date).reserve_full === ReserveStatus.FULL || findDatesInfo(date).reserve_full === ReserveStatus.OVERDUE ? 'disabled' : ''
+                date && checked_day === findDatesInfo(date).date ? 'checked' : '',
+                date && (findDatesInfo(date).reserve_full === ReserveStatus.FULL || findDatesInfo(date).reserve_full === ReserveStatus.OVERDUE) ? 'disabled' : ''
               ]"
             >
               <view v-if="findDatesInfo(date).date">
@@ -188,6 +188,9 @@ const weeks = computed(() => {
 
   // 添加最后一行
   if (currentWeek.length > 0) {
+    while (currentWeek.length < 7) {
+      currentWeek.push('');
+    }
     result.push(currentWeek);
   }