refactor(日历组件): 优化日历高度计算和滚动隐藏逻辑

使用 ResizeObserver 替代手动计算日历高度
添加滚动时隐藏日历头部的动画效果

 <!--
  * @Date: 2025-01-25 15:34:17
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-12-18 22:13:17
+ * @LastEditTime: 2025-12-18 22:33:09
  * @FilePath: /mlaj/src/components/ui/CollapsibleCalendar.vue
  * @Description: 可折叠日历组件
 -->
 <template>
     <div class="collapsible-calendar ">
         <!-- 折叠状态显示 -->
-        <div class="calendar-collapsed">
+        <div class="calendar-collapsed" :class="{ 'is-compact': isHeaderHidden }">
             <div class="calendar-header">
                 <div class="calendar-icon">
                     <svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
@@ -29,7 +29,7 @@
                 <div class="calendar-date-display" @click="expandCalendar">
                     <div class="calendar-date-main">{{ formattedCurrentDate }}</div>
                     <div class="calendar-weekday">{{ formattedWeekday }}</div>
-                    <div class="text-xs text-gray-500 mt-1">点击切换日期</div>
+                    <div class="text-xs text-gray-500 mt-1 collapsible-text">点击切换日期</div>
                 </div>
                 <!-- <div class="calendar-action">
                     <div class="calendar-action-text">指定日期</div>
@@ -49,7 +49,7 @@
                             </svg>
                         </div>
                     </div>
-                    <div v-if="selectedSubtask" class="text-xs text-gray-500 mt-1 cursor-pointer hover:text-green-600 transition-colors" @click.stop="openRulesPopup">点击查看打卡规则</div>
+                    <div v-if="selectedSubtask" class="text-xs text-gray-500 mt-1 cursor-pointer hover:text-green-600 transition-colors collapsible-text" @click.stop="openRulesPopup">点击查看打卡规则</div>
                 </div>
             </div>
         </div>
@@ -119,6 +119,7 @@
 
 <script setup>
 import { ref, computed, watch, onMounted } from 'vue'
+import { useScroll } from '@vueuse/core'
 import dayjs from 'dayjs'
 
 // Props定义
@@ -155,6 +156,44 @@ const selectedCourseText = ref('全部作业')
 const selectedCourseId = ref('')
 const showRulesPopup = ref(false)
 
+const { y } = useScroll(window)
+const isHeaderHidden = ref(false)
+const lastY = ref(0)
+
+watch(y, (newY) => {
+    // 忽略弹性滚动造成的负值
+    if (newY < 0) return
+
+    // 获取文档高度和窗口高度，用于判断是否触底
+    const windowHeight = window.innerHeight
+    const documentHeight = document.documentElement.scrollHeight
+    const bottomThreshold = 20 // 触底阈值
+
+    // 如果接近底部，不执行隐藏逻辑（避免回弹导致的显示）
+    if (newY + windowHeight >= documentHeight - bottomThreshold) {
+        // 如果已经在底部，保持之前的状态，或者强制隐藏（根据需求，通常保持当前状态更稳妥，或者强制隐藏因为是在向下浏览）
+        // 这里选择保持状态，但更新lastY防止下次误判
+        lastY.value = newY
+        return
+    }
+
+    // 滚动方向判定
+    const direction = newY > lastY.value ? 'down' : 'up'
+    const scrollThreshold = 50 // 滚动阈值
+
+    if (newY > scrollThreshold && direction === 'down') {
+        isHeaderHidden.value = true
+    } else if (direction === 'up') {
+        // 只有当向上滚动超过一定距离或者不在底部反弹区域时才显示
+        // 这里的判断其实已经被上面的触底检测覆盖了一部分，但为了保险，可以加一个最小变动阈值
+        if (Math.abs(newY - lastY.value) > 5) {
+             isHeaderHidden.value = false
+        }
+    }
+
+    lastY.value = newY
+})
+
 const courseColumns = computed(() => {
     return [
         { text: '全部作业', value: '' },
@@ -335,11 +374,39 @@ defineExpose({
         transition: all 0.1s ease;
     }
 
+    // 紧凑模式下的样式控制
+    &.is-compact {
+        .calendar-header {
+            max-height: 0;
+            margin-bottom: 0;
+            opacity: 0;
+            pointer-events: none;
+        }
+
+        .collapsible-text {
+            max-height: 0;
+            margin-top: 0;
+            opacity: 0;
+            overflow: hidden;
+        }
+    }
+
     .calendar-header {
         display: flex;
         align-items: center;
         margin-bottom: 16px;
         gap: 12px;
+        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+        max-height: 100px;
+        opacity: 1;
+        overflow: hidden;
+
+        &.is-hidden {
+            max-height: 0;
+            margin-bottom: 0;
+            opacity: 0;
+            pointer-events: none;
+        }
 
         .calendar-icon {
             display: flex;
@@ -458,6 +525,12 @@ defineExpose({
     }
 }
 
+.collapsible-text {
+    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    max-height: 20px; // 假设文字高度不超过20px
+    opacity: 1;
+}
+
 .calendar-popup-content {
     height: 100%;
     overflow: hidden;

@@ -9,7 +9,7 @@
   <AppLayout :hasTitle="false">
     <van-config-provider :theme-vars="themeVars">
       <!-- 固定的日历组件 -->
-      <div class="fixed-calendar">
+      <div class="fixed-calendar" ref="fixedCalendarWrapper">
         <CollapsibleCalendar
           ref="calendarRef"
           :title="taskDetail.title"
@@ -146,7 +146,7 @@ import FrostedGlass from "@/components/ui/FrostedGlass.vue";
 import CollapsibleCalendar from "@/components/ui/CollapsibleCalendar.vue";
 import PostCountModel from "@/components/count/postCountModel.vue";
 import CheckinCard from "@/components/checkin/CheckinCard.vue";
-import { useTitle } from '@vueuse/core';
+import { useTitle, useResizeObserver } from '@vueuse/core';
 import dayjs from 'dayjs';
 
 import { getTaskDetailAPI, getUploadTaskListAPI, delUploadTaskInfoAPI, likeUploadTaskInfoAPI, dislikeUploadTaskInfoAPI } from "@/api/checkin";
@@ -167,18 +167,17 @@ const windowWidth = ref(window.innerWidth);
 
 // 日历高度相关的响应式数据
 const calendarRef = ref(null);
+const fixedCalendarWrapper = ref(null);
 const calendarHeight = ref(200); // 默认高度
 
-/**
- * 动态获取日历组件的实际高度
- */
-const updateCalendarHeight = async () => {
-    await nextTick();
-    if (calendarRef.value) {
-        const rect = calendarRef.value.$el.getBoundingClientRect();
-        calendarHeight.value = rect.height;
+// 使用 ResizeObserver 监听日历容器高度变化
+useResizeObserver(fixedCalendarWrapper, (entries) => {
+    const entry = entries[0];
+    if (entry && entry.target) {
+        // 使用 getBoundingClientRect 获取包含 padding 和 border 的完整高度
+        calendarHeight.value = entry.target.getBoundingClientRect().height;
     }
-};
+});
 
 /**
  * 监听窗口尺寸变化
@@ -186,8 +185,6 @@ const updateCalendarHeight = async () => {
 const handleResize = () => {
     windowHeight.value = window.innerHeight;
     windowWidth.value = window.innerWidth;
-    // 重新计算日历高度
-    updateCalendarHeight();
 };
 
 // 组件挂载时添加事件监听
@@ -198,9 +195,6 @@ onMounted(() => {
     // 延迟更新，等待方向变化完成
     setTimeout(handleResize, 100);
   });
-
-  // 初始化时计算日历高度
-  updateCalendarHeight();
 });
 
 // CheckinCard refs