feat(teacher/form): 添加课程章节选择功能并优化表单字段显示

- 在作业表单中新增课程章节选择器及相关逻辑
- 将日历图标替换为更符合语义的图标
- 为必填字段添加提示标识
- 优化选择字段的显示样式，增加选中值展示区域

@@ -2,7 +2,7 @@
  * @Author: hookehuyr hookehuyr@gmail.com
  * @Date: 2025-01-20 10:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-06-20 15:43:37
+ * @LastEditTime: 2025-06-20 16:01:50
  * @FilePath: /mlaj/src/views/teacher/formPage.vue
  * @Description: 教师作业新增表单页面
 -->
@@ -18,7 +18,7 @@
                 <van-field
                   v-model="formData.homework_name"
                   name="homework_name"
-                  placeholder="请输入作业名称"
+                  placeholder="请输入作业名称(必填)"
                   required
                   :border="false"
                   class="homework-name-field"
@@ -100,25 +100,52 @@
               <div class="mb-6">
                 <div class="select-row">
                   <div class="select-item">
-                    <van-icon name="calendar-o" class="select-icon" />
+                    <van-icon name="friends-o" class="select-icon" />
                     <span class="select-label">所在年级：</span>
+                    <span class="select-value" @click="showGradePicker = true">{{ formData.grade || '请选择年级' }}</span>
                     <van-icon name="arrow" class="arrow-icon" @click="showGradePicker = true" />
                   </div>
                 </div>
                 <div class="select-row">
                   <div class="select-item">
-                    <van-icon name="calendar-o" class="select-icon" />
+                    <van-icon name="friends-o" class="select-icon" />
                     <span class="select-label">所在班级：</span>
+                    <span class="select-value" @click="showClassPicker = true">{{ formData.class_name || '请选择班级' }}</span>
                     <van-icon name="arrow" class="arrow-icon" @click="showClassPicker = true" />
                   </div>
                 </div>
                 <div class="select-row">
                   <div class="select-item">
-                    <van-icon name="calendar-o" class="select-icon" />
+                    <van-icon name="friends-o" class="select-icon" />
                     <span class="select-label">所在课程：</span>
+                    <span class="select-value" @click="showCoursePicker = true">{{ formData.course || '请选择课程' }}</span>
                     <van-icon name="arrow" class="arrow-icon" @click="showCoursePicker = true" />
                   </div>
                 </div>
+                <div class="select-row" v-if="formData.course">
+                  <div class="select-item">
+                    <van-icon name="bookmark-o" class="select-icon" />
+                    <span class="select-label">课程章节：</span>
+                    <span class="select-value" @click="showChapterPicker = true">{{ formData.chapter || '请选择章节' }}</span>
+                    <van-icon name="arrow" class="arrow-icon" @click="showChapterPicker = true" />
+                  </div>
+                </div>
+                <div class="select-row">
+                  <div class="select-item">
+                    <van-icon name="fire-o" class="select-icon" />
+                    <span class="select-label">所在活动：</span>
+                    <span class="select-value" @click="showActivityPicker = true">{{ formData.activity || '请选择活动' }}</span>
+                    <van-icon name="arrow" class="arrow-icon" @click="showActivityPicker = true" />
+                  </div>
+                </div>
+                <div class="select-row">
+                  <div class="select-item">
+                    <van-icon name="friends-o" class="select-icon" />
+                    <span class="select-label">所在小组：</span>
+                    <span class="select-value" @click="showGroupPicker = true">{{ formData.group_name || '请选择小组' }}</span>
+                    <van-icon name="arrow" class="arrow-icon" @click="showGroupPicker = true" />
+                  </div>
+                </div>
               </div>
 
               <!-- 提交按钮 -->
@@ -174,6 +201,17 @@
       </div>
     </van-popup>
 
+    <!-- 课程章节选择器 -->
+    <van-popup v-model:show="showChapterPicker" position="bottom">
+      <div class="p-4">
+        <van-search v-model="chapterSearchValue" placeholder="搜索章节" @search="searchChapter" />
+        <van-list>
+          <van-cell v-for="chapter in filteredChapters" :key="chapter.id" :title="chapter.name" is-link :border="false"
+            @click="onChapterSelect(chapter)" />
+        </van-list>
+      </div>
+    </van-popup>
+
     <!-- 活动选择器 -->
     <van-popup v-model:show="showActivityPicker" position="bottom">
       <div class="p-4">
@@ -244,6 +282,7 @@ const formData = ref({
   start_time: new Date(),
   end_time: new Date(),
   course: '',
+  chapter: '',
   activity: '',
   grade: '',
   class_name: '',
@@ -259,6 +298,7 @@ const showFrequencyPicker = ref(false);
 const showStartTimePicker = ref(false);
 const showEndTimePicker = ref(false);
 const showCoursePicker = ref(false);
+const showChapterPicker = ref(false);
 const showActivityPicker = ref(false);
 const showGradePicker = ref(false);
 const showClassPicker = ref(false);
@@ -287,6 +327,7 @@ const frequencyOptions = ref([
 
 // 搜索值
 const courseSearchValue = ref('');
+const chapterSearchValue = ref('');
 const activitySearchValue = ref('');
 const gradeSearchValue = ref('');
 const classSearchValue = ref('');
@@ -300,6 +341,37 @@ const courses = ref([
   { id: 4, name: '物理课程' }
 ]);
 
+// 章节数据 - 根据课程动态变化
+const chapters = ref([]);
+
+// 各课程对应的章节数据
+const courseChapters = {
+  '数学课程': [
+    { id: 1, name: '第一章 数与代数' },
+    { id: 2, name: '第二章 几何图形' },
+    { id: 3, name: '第三章 统计与概率' },
+    { id: 4, name: '第四章 函数与方程' }
+  ],
+  '语文课程': [
+    { id: 1, name: '第一单元 现代文阅读' },
+    { id: 2, name: '第二单元 古诗文阅读' },
+    { id: 3, name: '第三单元 写作训练' },
+    { id: 4, name: '第四单元 口语交际' }
+  ],
+  '英语课程': [
+    { id: 1, name: 'Unit 1 Hello World' },
+    { id: 2, name: 'Unit 2 My Family' },
+    { id: 3, name: 'Unit 3 School Life' },
+    { id: 4, name: 'Unit 4 Hobbies' }
+  ],
+  '物理课程': [
+    { id: 1, name: '第一章 力学基础' },
+    { id: 2, name: '第二章 热学原理' },
+    { id: 3, name: '第三章 电磁学' },
+    { id: 4, name: '第四章 光学现象' }
+  ]
+};
+
 const activities = ref([
   { id: 1, name: '春游活动' },
   { id: 2, name: '运动会' },
@@ -347,6 +419,13 @@ const filteredCourses = computed(() => {
   );
 });
 
+const filteredChapters = computed(() => {
+  if (!chapterSearchValue.value) return chapters.value;
+  return chapters.value.filter(chapter =>
+    chapter.name.toLowerCase().includes(chapterSearchValue.value.toLowerCase())
+  );
+});
+
 const filteredActivities = computed(() => {
   if (!activitySearchValue.value) return activities.value;
   return activities.value.filter(activity =>
@@ -431,11 +510,25 @@ const onEndTimeConfirm = () => {
  */
 const onCourseSelect = (course) => {
   formData.value.course = course.name;
+  // 清空之前选择的章节
+  formData.value.chapter = '';
+  // 根据选择的课程更新章节数据
+  chapters.value = courseChapters[course.name] || [];
   showCoursePicker.value = false;
   courseSearchValue.value = '';
 };
 
 /**
+ * 章节选择
+ * @param {Object} chapter - 选中的章节
+ */
+const onChapterSelect = (chapter) => {
+  formData.value.chapter = chapter.name;
+  showChapterPicker.value = false;
+  chapterSearchValue.value = '';
+};
+
+/**
  * 活动选择
  * @param {Object} activity - 选中的活动
  */
@@ -484,6 +577,14 @@ const searchCourse = (value) => {
 };
 
 /**
+ * 搜索章节
+ * @param {string} value - 搜索值
+ */
+const searchChapter = (value) => {
+  chapterSearchValue.value = value;
+};
+
+/**
  * 搜索活动
  * @param {string} value - 搜索值
  */
@@ -700,7 +801,16 @@ onMounted(() => {
 .select-label {
   font-size: 14px;
   color: #333;
+  margin-right: 12px;
+  min-width: 80px;
+}
+
+.select-value {
+  font-size: 14px;
+  color: #666;
   margin-right: auto;
+  flex: 1;
+  text-align: right;
 }
 
 /* 提交按钮 */