feat(lessonplan): 实现基于AI的学案自动生成与管理功能

- 新增DifyArticleClient工具类，实现基于Dify API的对话与文本生成功能
- 创建LessonPlansService接口及其实现，实现学案按天生成及存储
- 设计LessonPlansDO和StudentLessonPlansDO数据对象及对应MyBatis映射和数据库操作
- 扩展VocabularyBankDO实体及Mapper，支持查询单元词汇和学生未掌握词汇
- 利用deepoove-poi模板技术生成Word格式的学习计划文档，包含词汇、复习和练习
- 开发StringToPlanMapUtil工具类，解析AI返回结果为结构化学案内容
- 新增JUnit测试用例验证AI对话功能及学案生成逻辑正确性
- 更新Spring Boot配置，添加AI接口地址及密钥等参数
- 在前端Vue项目中新建学案页面，路由配置及导航菜单支持学案访问

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

@@ -7,6 +7,7 @@
         <result column="definition" jdbcType="VARCHAR" property="definition" />
         <result column="pronunciation" jdbcType="VARCHAR" property="pronunciation" />
         <result column="unit_id" jdbcType="INTEGER" property="unitId" />
+        <result column="pos" jdbcType="VARCHAR" property="pos" />
     </resultMap>
 
 
@@ -28,6 +29,9 @@
             <if test="unitId != null">
                 unit_id,
             </if>
+            <if test="pos != null">
+                pos,
+            </if>
         </trim>
         <trim prefix="values (" suffix=")" suffixOverrides=",">
             <if test="id != null">
@@ -45,6 +49,9 @@
             <if test="unitId != null">
                 #{unitId,jdbcType=INTEGER},
             </if>
+            <if test="pos != null">
+                #{pos,jdbcType=VARCHAR},
+            </if>
         </trim>
     </insert>
 
@@ -69,4 +76,46 @@
         from vocabulary_bank
     </select>
 
+    <select id="selectVocabularyBankDOAllByUnitId" resultMap="BaseResultMap">
+        select *
+        from vocabulary_bank
+        where unit_id = #{unitId}
+    </select>
+
+    <select id="selectVocabularyBankListStudentNotMaster" resultMap="BaseResultMap">
+    <![CDATA[
+        select *
+        from vocabulary_bank
+        where unit_id in (
+            select unit_id
+            from grade_unit
+            where grade_id = #{gradeId}
+        )
+            and id in (
+                select word_id
+                from word_mastery_log
+                where memory_strength < 0
+                    and student_id = #{studentId}
+            )
+        ]]>
+    </select>
+
+    <select id="selectVocabularyBankListSelfCheck" resultMap="BaseResultMap">
+        select *
+        from vocabulary_bank vb
+        inner join grade_unit gu on vb.unit_id = gu.unit_id
+        inner join word_mastery_log wml on vb.id = wml.word_id
+        where gu.grade_id = #{gradeId}
+        and wml.student_id = #{studentId}
+        <!-- 修复not in的语法错误 + 空集合防护 -->
+        <if test="ids != null and ids.size() > 0">
+            and vb.id not in (
+            <foreach item="id" collection="ids" separator=",">
+                #{id}
+            </foreach>
+            )
+        </if>
+        limit #{wordCount}
+    </select>
+
 </mapper>