修改培训状态选择方式，添加请选择选项

ruoyi-admin/src/main/resources/templates/system/train/examine.html

@@ -85,7 +85,8 @@
             <label class="col-sm-3 control-label is-required">培训状态：</label>
             <div class="col-sm-8">
                 <select name="trainState" required class="form-control m-b" th:with="type=${@dict.getType('sys_examine_state')}">
-                    <option th:each="dict : ${type}" th:text="${dict.dictLabel}" th:value="${dict.dictValue}" th:field="*{trainState}"></option>
+                    <option th:value="''" th:text="'请选择'"></option>
+                    <option th:each="dict : ${type}" th:text="${dict.dictLabel}" th:value="${dict.dictValue}"></option>
                 </select>
 <!--                <input name="trainState" th:field="*{trainState}" class="form-control" type="text">-->
             </div>