班次编号生成，改为XYD+年度+补零序号

frontend/src/views/student/shiftTeam/index.vue

@@ -133,7 +133,7 @@
         <el-row :gutter="16">
           <el-col :span="12">
             <el-form-item label="学员队编号" prop="xydbh">
-              <el-input v-model="form.xydbh" placeholder="请输入学员队编号" :disabled="!isAdd" />
+              <el-input v-model="form.xydbh" placeholder="留空自动生成（XYD+年级+四位序号）" :disabled="!isAdd" />
             </el-form-item>
           </el-col>
           <el-col :span="12">
@@ -408,7 +408,7 @@ export default {
       formSaving: false,
       form: this.createEmptyForm(),
       formRules: {
-        xydbh: [{ required: true, message: '请输入学员队编号', trigger: 'blur' }],
+        xydbh: [{ required: false }],
         xydmc: [{ required: true, message: '请输入学员队名称', trigger: 'blur' }],
         xydrs: [{ required: true, message: '请输入学员队人数', trigger: 'change' }],
         zydh: [{ required: true, message: '请选择专业', trigger: 'change' }],