refactor(teacher/formPage): 优化表单页面布局和章节数据管理

- 调整目标次数输入框宽度为相对单位
- 移除章节与课程的关联逻辑，改为独立章节列表
- 优化目标次数容器布局为两端对齐
- 设置目标次数默认值为1

@@ -2,7 +2,7 @@
  * @Author: hookehuyr hookehuyr@gmail.com
  * @Author: hookehuyr hookehuyr@gmail.com
  * @Date: 2025-01-20 10:00:00
  * @Date: 2025-01-20 10:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-06-20 16:01:50
+ * @LastEditTime: 2025-06-23 09:49:16
  * @FilePath: /mlaj/src/views/teacher/formPage.vue
  * @FilePath: /mlaj/src/views/teacher/formPage.vue
  * @Description: 教师作业新增表单页面
  * @Description: 教师作业新增表单页面
 -->
 -->
@@ -41,7 +41,7 @@
               <!-- 作业设置 -->
               <!-- 作业设置 -->
               <div class="mb-6">
               <div class="mb-6">
                 <h3 class="section-title">作业设置</h3>
                 <h3 class="section-title">作业设置</h3>
-                <van-row>
+                <van-row gutter="10">
                   <van-col span="12">
                   <van-col span="12">
                     <label class="setting-label">作业频次</label>
                     <label class="setting-label">作业频次</label>
                     <van-field
                     <van-field
@@ -64,7 +64,7 @@
                         max="100"
                         max="100"
                         integer
                         integer
                         button-size="24px"
                         button-size="24px"
-                        input-width="60px"
+                        input-width="5rem"
                       />
                       />
                       <span class="target-unit">次</span>
                       <span class="target-unit">次</span>
                     </div>
                     </div>
@@ -122,7 +122,7 @@
                     <van-icon name="arrow" class="arrow-icon" @click="showCoursePicker = true" />
                     <van-icon name="arrow" class="arrow-icon" @click="showCoursePicker = true" />
                   </div>
                   </div>
                 </div>
                 </div>
-                <div class="select-row" v-if="formData.course">
+                <div class="select-row">
                   <div class="select-item">
                   <div class="select-item">
                     <van-icon name="bookmark-o" class="select-icon" />
                     <van-icon name="bookmark-o" class="select-icon" />
                     <span class="select-label">课程章节：</span>
                     <span class="select-label">课程章节：</span>
@@ -278,7 +278,7 @@ const formData = ref({
   description: '',
   description: '',
   type: $route.query.type === 'homework' ? '上传附件' : '签到',
   type: $route.query.type === 'homework' ? '上传附件' : '签到',
   frequency: '',
   frequency: '',
-  target_count: 10,
+  target_count: 1,
   start_time: new Date(),
   start_time: new Date(),
   end_time: new Date(),
   end_time: new Date(),
   course: '',
   course: '',
@@ -341,36 +341,25 @@ const courses = ref([
   { id: 4, name: '物理课程' }
   { 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' }
-  ]
-};
+// 章节数据 - 独立的章节列表，不与课程关联
+const chapters = ref([
+  { 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' },
+  { id: 5, name: '第一单元 现代文阅读' },
+  { id: 6, name: '第二单元 古诗文阅读' },
+  { id: 7, name: '第三单元 写作训练' },
+  { id: 8, name: '第四单元 口语交际' },
+  { id: 9, name: 'Unit 1 Hello World' },
+  { id: 10, name: 'Unit 2 My Family' },
+  { id: 11, name: 'Unit 3 School Life' },
+  { id: 12, name: 'Unit 4 Hobbies' },
+  { id: 13, name: '第一章 力学基础' },
+  { id: 14, name: '第二章 热学原理' },
+  { id: 15, name: '第三章 电磁学' },
+  { id: 16, name: '第四章 光学现象' }
+]);
 
 
 const activities = ref([
 const activities = ref([
   { id: 1, name: '春游活动' },
   { id: 1, name: '春游活动' },
@@ -510,10 +499,6 @@ const onEndTimeConfirm = () => {
  */
  */
 const onCourseSelect = (course) => {
 const onCourseSelect = (course) => {
   formData.value.course = course.name;
   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;
   showCoursePicker.value = false;
   courseSearchValue.value = '';
   courseSearchValue.value = '';
 };
 };
@@ -728,7 +713,7 @@ onMounted(() => {
 .target-count-container {
 .target-count-container {
   display: flex;
   display: flex;
   align-items: center;
   align-items: center;
-  justify-content: center;
+  justify-content: space-around;
   gap: 8px;
   gap: 8px;
 }
 }