feat(exam): 支持按单个学生和考试类型生成考试试题

- 修改生成试题按钮仅在选中特定一个学生时可用，避免多选时误操作
- 在考试生成对话框新增“类型”选择项，支持“摸底”和“期中|期末”类型
- 调整后台接口，使用单个学生ID和考试类型替代学生ID列表参数
- 优化考试生成服务，新增摸底考试生成逻辑，按年级分区随机抽词汇
- 考试相关数据对象新增类型字段，保持数据完整性和一致性
- 修改考试判卷服务，将错误信息字段统一为msg，避免字段混淆
- 调整数据库操作，支持单个学生考试与词汇随机获取
- 同步更新测试用例和词汇库数据插入逻辑，确保环境一致性
- 修复界面生成按钮状态和对话框提交按钮的校验逻辑，提升用户体验

enlish-service/src/main/resources/mapper/ExamWordsDOMapper.xml

@@ -7,6 +7,7 @@
         <result column="level" jdbcType="INTEGER" property="level" />
         <result column="title" jdbcType="VARCHAR" property="title" />
         <result column="created_at" jdbcType="TIMESTAMP" property="createdAt" />
+        <result column="type" jdbcType="INTEGER" property="type" />
     </resultMap>
     <resultMap extends="BaseResultMap" id="ResultMapWithBLOBs" type="com.yinlihupo.enlish.service.domain.dataobject.ExamWordsDO">
         <result column="word_ids" jdbcType="LONGVARCHAR" property="wordIds" typeHandler="com.yinlihupo.enlish.service.config.ListWordIdTypeHandler" />

enlish-service/src/main/resources/mapper/ExamWordsJudgeResultDOMapper.xml

@@ -11,7 +11,8 @@
         <result column="wrong_word_count" jdbcType="INTEGER" property="wrongWordCount" />
         <result column="is_finished" jdbcType="INTEGER" property="isFinished" />
         <result column="start_date" jdbcType="TIMESTAMP" property="startDate" />
-        <result column="error_msg" jdbcType="VARCHAR" property="errorMsg" />
+        <result column="msg" jdbcType="VARCHAR" property="msg" />
+        <result column="ans_grade_id" jdbcType="INTEGER" property="ansGradeId" />
     </resultMap>
 
     <resultMap extends="BaseResultMap" id="ResultMapWithBLOBs" type="com.yinlihupo.enlish.service.domain.dataobject.ExamWordsJudgeResultDO">
@@ -31,9 +32,9 @@
         limit #{count}
     </select>
 
-    <update id="updateErrorMsg">
+    <update id="updateMsg">
         update exam_words_judge_result
-        set error_msg = #{errorMsg}
+        set msg = #{msg}
             and is_finished = 2
         where id = #{id}
     </update>

enlish-service/src/main/resources/mapper/StudentExamWordsDOMapper.xml

@@ -13,9 +13,7 @@
         insert into student_exam_words
             (student_id, exam_words_id, is_completed, start_data)
         values
-        <foreach collection="studentIds" item="studentId"  separator=",">
             (#{studentId}, #{examWordsId}, 0, now())
-        </foreach>
     </insert>
 
     <select id="selectByStudentIdAndExamWordsId" resultMap="BaseResultMap">

enlish-service/src/main/resources/mapper/VocabularyBankDOMapper.xml

@@ -122,4 +122,16 @@
         from vocabulary_bank
     </select>
 
+    <select id="selectVocabularyBankListByGradeIdRandom" resultMap="BaseResultMap">
+        select *
+        from vocabulary_bank
+        where unit_id in (
+            select unit_id
+            from grade_unit
+            where grade_id = #{gradeId}
+        )
+        order by rand()
+        limit #{wordCount}
+    </select>
+
 </mapper>