refactor: 删除学生管理中的学科字段

前端：
- 列表页删除学科列
- 编辑弹窗删除学科下拉框

后端：
- PgStudent 实体删除 subjectId 字段
- StudentVo 删除 subjectId 和 subjectName 字段
- Service 层删除学科关联查询

需求文档：
- 删除学生数据项中的学科字段
- 删除表格列定义中的学科列

数据库需执行：ALTER TABLE pg_student DROP COLUMN subject_id;

backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/student/domain/PgStudent.java

@@ -44,8 +44,6 @@ public class PgStudent extends BaseEntity {
 
     private Long schoolClassId;
 
-    private Long subjectId;
-
     private Long memberId;
 
     private String status;

backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/student/domain/vo/StudentVo.java

@@ -50,13 +50,6 @@ public class StudentVo {
      */
     private String className;
 
-    private Long subjectId;
-
-    /**
-     * 学科名称
-     */
-    private String subjectName;
-
     private Long memberId;
 
     /**

backend/ruoyi-modules/pangu-business/src/main/java/org/dromara/pangu/student/service/impl/PgStudentServiceImpl.java

@@ -22,8 +22,6 @@ import org.dromara.pangu.school.domain.PgSchoolGrade;
 import org.dromara.pangu.school.mapper.PgSchoolClassMapper;
 import org.dromara.pangu.school.mapper.PgSchoolGradeMapper;
 import org.dromara.pangu.school.mapper.PgSchoolMapper;
-import org.dromara.pangu.base.domain.PgSubject;
-import org.dromara.pangu.base.mapper.PgSubjectMapper;
 import org.dromara.pangu.student.domain.PgStudent;
 import org.dromara.pangu.student.domain.dto.StudentImportDto;
 import org.dromara.pangu.student.domain.vo.StudentVo;
@@ -53,7 +51,6 @@ public class PgStudentServiceImpl implements IPgStudentService {
     private final PgSchoolClassMapper schoolClassMapper;
     private final PgGradeMapper gradeMapper;
     private final PgClassMapper classMapper;
-    private final PgSubjectMapper subjectMapper;
     private final PgMemberMapper memberMapper;
 
     @Override
@@ -123,14 +120,12 @@ public class PgStudentServiceImpl implements IPgStudentService {
         Set<Long> schoolIds = new HashSet<>();
         Set<Long> schoolGradeIds = new HashSet<>();
         Set<Long> schoolClassIds = new HashSet<>();
-        Set<Long> subjectIds = new HashSet<>();
         Set<Long> memberIds = new HashSet<>();
 
         for (PgStudent s : students) {
             if (s.getSchoolId() != null) schoolIds.add(s.getSchoolId());
             if (s.getSchoolGradeId() != null) schoolGradeIds.add(s.getSchoolGradeId());
             if (s.getSchoolClassId() != null) schoolClassIds.add(s.getSchoolClassId());
-            if (s.getSubjectId() != null) subjectIds.add(s.getSubjectId());
             if (s.getMemberId() != null) memberIds.add(s.getMemberId());
         }
 
@@ -147,10 +142,6 @@ public class PgStudentServiceImpl implements IPgStudentService {
             schoolClassMapper.selectByIds(schoolClassIds).stream()
                 .collect(Collectors.toMap(PgSchoolClass::getId, Function.identity()));
 
-        Map<Long, PgSubject> subjectMap = subjectIds.isEmpty() ? Collections.emptyMap() :
-            subjectMapper.selectByIds(subjectIds).stream()
-                .collect(Collectors.toMap(PgSubject::getSubjectId, Function.identity()));
-
         Map<Long, PgMember> memberMap = memberIds.isEmpty() ? Collections.emptyMap() :
             memberMapper.selectByIds(memberIds).stream()
                 .collect(Collectors.toMap(PgMember::getMemberId, Function.identity()));
@@ -198,12 +189,6 @@ public class PgStudentServiceImpl implements IPgStudentService {
                 vo.setClassName(classNameMap.get(schoolClass.getClassId()));
             }
             
-            // 填充学科名称
-            PgSubject subject = subjectMap.get(s.getSubjectId());
-            if (subject != null) {
-                vo.setSubjectName(subject.getSubjectName());
-            }
-            
             // 填充会员信息
             PgMember member = memberMap.get(s.getMemberId());
             if (member != null) {

docs/01-需求文档/需求规格说明书_v1.0.md

@@ -322,7 +322,7 @@
 
 | 功能编号    | 功能名称   | 功能描述                | 优先级 |
 | ------- | ------ | ------------------- |:---:|
-| STU-001 | 学生列表查询 | 按姓名、学号、性别、手机号、学科等筛选 | P0  |
+| STU-001 | 学生列表查询 | 按姓名、学号、性别、手机号等筛选 | P0  |
 | STU-002 | 学校树筛选  | 通过左侧学校树快速定位学生，点击节点时带上完整层级条件（学校+年级+班级） | P0  |
 | STU-003 | 新增学生   | 手动创建学生信息            | P0  |
 | STU-004 | 编辑学生   | 修改学生基本信息            | P0  |
@@ -372,7 +372,6 @@
 | 所属学校 | 下拉选择 | ✓   | 依赖区域        |
 | 所属年级 | 下拉选择 | ✓   | 依赖学校        |
 | 所属班级 | 下拉选择 | ✓   | 依赖年级        |
-| 学科   | 下拉选择 | -   | 学科信息        |
 | 归属用户 | 关联   | ✓   | 关联会员ID      |
 | 创建时间 | 日期时间 | -   | 系统自动记录      |
 
@@ -844,7 +843,6 @@
 | 学校 | 学校名称 |
 | 年级 | 年级名称 |
 | 班级 | 班级名称 |
-| 学科 | 学科名称 |
 | 用户身份 | 家长/教师 |
 | 用户昵称 | 归属会员昵称 |
 | 用户手机号 | 归属会员手机号 |

frontend/ruoyi-ui/src/views/business/student/components/StudentDialog.vue

@@ -53,11 +53,6 @@
           @change="handleSchoolChange"
         />
       </el-form-item>
-      <el-form-item label="学科" prop="subjectId">
-        <el-select v-model="form.subjectId" placeholder="请选择学科（选填）" clearable style="width: 100%">
-          <el-option v-for="item in subjectList" :key="item.subjectId" :label="item.subjectName" :value="item.subjectId" />
-        </el-select>
-      </el-form-item>
       <el-form-item label="归属用户" prop="memberId">
         <div style="display: flex; gap: 8px; width: 100%">
           <el-input 
@@ -102,8 +97,6 @@ const memberSelectRef = ref()
 
 // 学校树数据
 const schoolTreeData = ref([])
-// 学科列表
-const subjectList = ref([])
 
 const initialForm = {
   studentId: null,
@@ -115,7 +108,6 @@ const initialForm = {
   schoolId: null,
   schoolGradeId: null,
   schoolClassId: null,
-  subjectId: null,
   memberId: null,
   memberDisplay: ''
 }
@@ -143,18 +135,6 @@ const getSchoolTree = async () => {
   }
 }
 
-// 获取学科列表
-const getSubjectList = async () => {
-  try {
-    const res = await request.get('/business/subject/list', { params: { status: '0' } })
-    if (res.code === 200) {
-      subjectList.value = res.rows || []
-    }
-  } catch (e) {
-    console.error('获取学科列表失败:', e)
-  }
-}
-
 // 格式化出生日期
 const formatBirthday = (date) => {
   if (!date) return ''
@@ -190,7 +170,7 @@ const open = async (row = null) => {
   formRef.value?.clearValidate()
   
   // 获取基础数据
-  await Promise.all([getSchoolTree(), getSubjectList()])
+  await getSchoolTree()
   
   // 编辑模式：加载学生详情
   if (row) {
@@ -203,7 +183,6 @@ const open = async (row = null) => {
         form.studentNo = data.studentNo
         form.gender = data.gender || '0'
         form.birthday = data.birthday ? formatBirthday(data.birthday) : ''
-        form.subjectId = data.subjectId
         form.memberId = data.memberId
         form.memberDisplay = data.memberNickname ? `${data.memberNickname}（${data.memberPhone || ''}）` : ''
         
@@ -265,7 +244,6 @@ const handleSubmit = async () => {
       schoolId: form.schoolId,
       schoolGradeId: form.schoolGradeId,
       schoolClassId: form.schoolClassId,
-      subjectId: form.subjectId,
       memberId: form.memberId
     }
 

frontend/ruoyi-ui/src/views/business/student/index.vue

@@ -73,7 +73,6 @@
             <el-table-column prop="schoolName" label="学校" min-width="150" show-overflow-tooltip />
             <el-table-column prop="gradeName" label="年级" width="80" />
             <el-table-column prop="className" label="班级" width="80" />
-            <el-table-column prop="subjectName" label="学科" width="80" />
             <el-table-column prop="memberNickname" label="归属用户" width="120" show-overflow-tooltip>
               <template #default="{ row }">
                 <span v-if="row.memberNickname">{{ row.memberNickname }}</span>