feat(教师端): 优化作业详情显示和日历组件交互

重构作业详情显示逻辑，提取格式化函数复用
调整日历组件布局，增加打卡规则查看功能
修改任务筛选器宽度和对齐方式

 <template>
-  <div class="inline-block">
-    <div @click="show = true" class="text-sm text-gray-500 flex items-center cursor-pointer ml-2">
+  <div class="inline-block" style="width: 60%;">
+    <div @click="show = true" class="text-sm text-gray-500 flex items-center justify-end cursor-pointer ml-2">
       <span class="mr-1">{{ selectedLabel }}</span>
       <van-icon name="arrow-down" />
     </div>

 <!--
  * @Date: 2025-01-25 15:34:17
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-12-14 22:08:03
+ * @LastEditTime: 2025-12-18 22:06:48
  * @FilePath: /mlaj/src/components/ui/CollapsibleCalendar.vue
  * @Description: 可折叠日历组件
 -->
@@ -20,15 +20,16 @@
                     <div class="calendar-date-main">{{ formattedCurrentDate }}</div>
                     <div class="calendar-weekday">{{ formattedWeekday }}</div>
                 </div> -->
-                <div class="calendar-title-wrapper" @click="expandCalendar">
+                <div class="calendar-title-wrapper">
                     <div class="calendar-title">{{ title }}</div>
-                    <div class="calendar-subtitle">点击切换日期</div>
+                    <!-- <div class="text-xs text-gray-500 mt-1">点击查看打卡规则</div> -->
                 </div>
             </div>
             <div class="calendar-content">
-                <div class="calendar-date-display">
+                <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>
                 <!-- <div class="calendar-action">
                     <div class="calendar-action-text">指定日期</div>
@@ -48,6 +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>
             </div>
         </div>
@@ -93,6 +95,25 @@
                 :default-index="0"
             />
         </van-popup>
+        <!-- 打卡规则弹窗 -->
+        <van-popup
+            v-model:show="showRulesPopup"
+            round
+            position="bottom"
+            closeable
+            :style="{ maxHeight: '50%' }"
+        >
+            <div class="p-4">
+                <div class="text-lg font-bold mb-4 text-center text-gray-800">打卡规则</div>
+                <div class="details text-sm text-gray-600 pl-4 border-l-4 border-green-500" v-if="formattedRules">
+                    <div class="mb-2">周期：{{ formattedRules.cycle }}</div>
+                    <div class="mb-2">频次：{{ formattedRules.frequency }}</div>
+                    <div v-if="formattedRules.begin_date" class="mb-2">开始时间：{{ formattedRules.begin_date }}</div>
+                    <div v-if="formattedRules.end_date" class="mb-2">截止时间：{{ formattedRules.end_date }}</div>
+                    <div v-if="formattedRules.attachment_type" class="mb-2">附件类型：{{ formattedRules.attachment_type }}</div>
+                </div>
+            </div>
+        </van-popup>
     </div>
 </template>
 
@@ -131,6 +152,9 @@ const currentDate = ref(props.modelValue || new Date())
 // 作业筛选相关
 const showCoursePicker = ref(false)
 const selectedCourseText = ref('全部作业')
+const selectedCourseId = ref('')
+const showRulesPopup = ref(false)
+
 const courseColumns = computed(() => {
     return [
         { text: '全部作业', value: '' },
@@ -141,14 +165,58 @@ const courseColumns = computed(() => {
     ]
 })
 
+const selectedSubtask = computed(() => {
+    if (!selectedCourseId.value) return null
+    return props.subtaskList.find(item => item.id === selectedCourseId.value)
+})
+
+const formattedRules = computed(() => {
+    if (!selectedSubtask.value) return null
+    const data = selectedSubtask.value
+
+    const cycleMap = {
+        '0': '本周期',
+        '30': '每月',
+        '7': '每周',
+        '1': '每日'
+    }
+    const cycleText = cycleMap[data.cycle] || data.cycle || '每日'
+
+    let attachmentText = '文本'
+    if (Array.isArray(data.attachment_type)) {
+        const typeMap = {
+            'text': '文本',
+            'image': '图片',
+            'video': '视频',
+            'audio': '音频'
+        }
+        attachmentText = data.attachment_type.map(t => typeMap[t] || t).join('/')
+    } else if (data.attachment_type) {
+        attachmentText = data.attachment_type
+    }
+
+    return {
+        cycle: cycleText,
+        frequency: `每周期${data.frequency || 1}次`,
+        begin_date: data.begin_date ? dayjs(data.begin_date).format('YYYY-MM-DD') : '',
+        end_date: data.end_date ? dayjs(data.end_date).format('YYYY-MM-DD') : '',
+        attachment_type: attachmentText
+    }
+})
+
 const openCoursePicker = () => {
     showCoursePicker.value = true
 }
 
+const openRulesPopup = () => {
+    showRulesPopup.value = true
+}
+
 const onConfirmCourse = (result) => {
     // 兼容 Vant 3/4
     const option = result.selectedOptions ? result.selectedOptions[0] : result
     selectedCourseText.value = option.text
+    selectedCourseId.value = option.value
     showCoursePicker.value = false
     emit('select-course', option.value)
 }
@@ -298,12 +366,6 @@ defineExpose({
                 // text-overflow: ellipsis;
                 // white-space: nowrap;
             }
-
-            .calendar-subtitle {
-                font-size: 12px;
-                color: #7f8c8d;
-                font-weight: 400;
-            }
         }
 
         .calendar-date-display {
@@ -322,6 +384,12 @@ defineExpose({
                 color: #4caf50;
                 font-weight: 500;
             }
+
+            .calendar-subtitle {
+                font-size: 12px;
+                color: #7f8c8d;
+                font-weight: 400;
+            }
         }
     }
 

 <!--
  * @Date: 2025-11-19 21:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-12-15 18:18:51
+ * @LastEditTime: 2025-12-18 21:54:18
  * @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）
 -->
@@ -27,11 +27,11 @@
 
             <div class="intro text-base text-gray-700 leading-relaxed mb-3" v-html="task_intro"></div>
             <div class="details text-sm text-gray-600" v-if="!subtask_list.length || selectedSubtaskId">
-                <div class="detailItem">周期：{{ task_details.cycle }}</div>
-                <div class="detailItem">频次：{{ task_details.frequency }}</div>
-                <div v-if="task_details.begin_date" class="detailItem">开始时间：{{ task_details.begin_date }}</div>
-                <div v-if="task_details.end_date" class="detailItem">截止时间：{{ task_details.end_date }}</div>
-                <div v-if="task_details.attachment_type.length" class="detailItem">附件类型：{{ task_details.attachment_type
+                <div class="detailItem">周期：{{ display_details.cycle }}</div>
+                <div class="detailItem">频次：{{ display_details.frequency }}</div>
+                <div v-if="display_details.begin_date" class="detailItem">开始时间：{{ display_details.begin_date }}</div>
+                <div v-if="display_details.end_date" class="detailItem">截止时间：{{ display_details.end_date }}</div>
+                <div v-if="display_details.attachment_type && display_details.attachment_type.length" class="detailItem">附件类型：{{ display_details.attachment_type
                     }}</div>
                 <div v-if="task_type === 'checkin'" class="detailItem">类型：打卡签到</div>
             </div>
@@ -304,6 +304,47 @@ const on_confirm_subtask = ({ selectedOptions }) => {
     show_subtask_picker.value = false
 }
 
+const formatTaskDetails = (data) => {
+    const cycleMap = {
+        '0': '本周期',
+        '30': '每月',
+        '7': '每周',
+        '1': '每日'
+    }
+    const cycleText = cycleMap[data.cycle] || data.cycle || '每日'
+
+    let attachmentText = '文本'
+    if (Array.isArray(data.attachment_type)) {
+        const typeMap = {
+            'text': '文本',
+            'image': '图片',
+            'video': '视频',
+            'audio': '音频'
+        }
+        attachmentText = data.attachment_type.map(t => typeMap[t] || t).join('/')
+    } else if (data.attachment_type) {
+        attachmentText = data.attachment_type
+    }
+
+    return {
+        cycle: cycleText,
+        frequency: `每周期${data.frequency || 1}次`,
+        begin_date: data.begin_date ? dayjs(data.begin_date).format('YYYY-MM-DD') : '',
+        end_date: data.end_date ? dayjs(data.end_date).format('YYYY-MM-DD') : '',
+        attachment_type: attachmentText
+    }
+}
+
+const display_details = computed(() => {
+    if (selectedSubtaskId.value && subtask_list.value.length) {
+        const sub = subtask_list.value.find(item => item.id === selectedSubtaskId.value)
+        if (sub) {
+            return formatTaskDetails(sub)
+        }
+    }
+    return task_details.value
+})
+
 /**
  * 获取作业详情和学生完成情况
  */
@@ -322,38 +363,7 @@ const fetchData = async () => {
             // 小作业列表
             subtask_list.value = res.data.subtask_list || []
 
-            // 格式化周期显示
-            const cycleMap = {
-                '0': '本周期',
-                '30': '每月',
-                '7': '每周',
-                '1': '每日' // 假设 1 代表每日
-            }
-            // 如果后端返回的是数字字符串，尝试映射，否则直接显示
-            const cycleText = cycleMap[res.data.cycle] || res.data.cycle || '每日'
-
-            // 格式化附件类型
-            let attachmentText = '文本'
-            if (Array.isArray(res.data.attachment_type)) {
-                const typeMap = {
-                    'text': '文本',
-                    'image': '图片',
-                    'video': '视频',
-                    'audio': '音频'
-                }
-                attachmentText = res.data.attachment_type.map(t => typeMap[t] || t).join('/')
-            } else if (res.data.attachment_type) {
-                attachmentText = res.data.attachment_type
-            }
-
-            task_details.value = {
-                cycle: cycleText,
-                frequency: `每周期${res.data.frequency || 1}次`,
-                begin_date: res.data.begin_date ? dayjs(res.data.begin_date).format('YYYY-MM-DD') : '',
-                end_date: res.data.end_date ? dayjs(res.data.end_date).format('YYYY-MM-DD') : '',
-                // time_range: `${res.data.begin_date || '00:00'} ~ ${res.data.end_date || '23:59'}`, // 注意：API返回的begin_date/end_date可能是日期也可能是时间，这里暂且直接展示
-                attachment_type: attachmentText
-            }
+            task_details.value = formatTaskDetails(res.data)
 
             user_list.value = res.data.user_list || []