feat(student): 实现学生学习分析功能

- 新增AnalyzeStudentStudyReqVO用于分析请求参数封装
- StudentService接口新增analyzeStudentStudy方法及其实现
- 实现分析逻辑，查询最近7天学生考试及单词掌握记录，构造分析数据
- 通过DifyArticleClient调用外部AI服务生成学习分析结果
- 使用Redis缓存分析结果，设置3天过期
- 新增ExamWordsJudgeResultDetail和WordMasteryDetail数据模型
- Mapper新增支持根据学生ID和时间范围查询考试结果和单词掌握日志
- DifyArticleClient新增sendStudentAnalyze方法调用分析接口
- 前端学生页面新增学习分析面板及调用接口，支持超时设置
- 修改路由权限配置，允许访问学习分析接口
- 添加markdown-it库支持分析结果富文本渲染
- 移除RoleServiceImpl中redis设置过期时间，改为永久保存

enlish-vue/src/pages/student.vue

@@ -32,6 +32,20 @@
                         <div class="text-md font-semibold mb-3">学生学案记录</div>
                         <PlanHistoryChart :student-id="route.params.id" />
                     </div>
+                    <div class="bg-white dark:bg-gray-800 rounded-lg shadow p-6">
+                        <div class="flex items-center justify-between mb-3">
+                            <div class="text-md font-semibold">学习分析</div>
+                            <el-button type="primary" size="small" :loading="analyzeLoading" @click="fetchStudyAnalyze">
+                                生成学习分析
+                            </el-button>
+                        </div>
+                        <template v-if="analysisHtml">
+                            <div class="leading-7 text-gray-700 dark:text-gray-200" v-html="analysisHtml"></div>
+                        </template>
+                        <template v-else>
+                            <el-empty description="点击右上按钮生成学习分析" />
+                        </template>
+                    </div>
                 </div>
             </el-main>
 
@@ -41,17 +55,28 @@
 
 <script setup>
 import Header from '@/layouts/components/Header.vue'
-import { ref, onMounted } from 'vue'
+import { ref, onMounted, computed } from 'vue'
 import { useRoute } from 'vue-router'
-import { getStudentDetail } from '@/api/student'
+import { getStudentDetail, getStudentStudyAnalyze } from '@/api/student'
 import { getStudentExamHistory } from '@/api/exam'
 import ExamHistoryChart from '@/layouts/components/student/ExamHistoryChart.vue'
 import PlanHistoryChart from '@/layouts/components/student/PlanHistoryChart.vue'
+import MarkdownIt from 'markdown-it'
 
 const loading = ref(false)
 const detail = ref(null)
 const route = useRoute()
 const history = ref([])
+const analyzeLoading = ref(false)
+const analysisText = ref('')
+const md = new MarkdownIt({
+    html: false,
+    linkify: true,
+    breaks: true
+})
+const analysisHtml = computed(() => {
+    return analysisText.value ? md.render(analysisText.value) : ''
+})
 
 async function fetchDetail() {
     const id = route.params.id
@@ -76,6 +101,22 @@ async function fetchExamHistory() {
     }) : []
 }
 
+async function fetchStudyAnalyze() {
+    const id = route.params.id
+    if (!id) return
+    analyzeLoading.value = true
+    try {
+        const res = await getStudentStudyAnalyze({
+            studentId: Number(id)
+        })
+        const d = res.data
+        const raw = typeof d?.data === 'string' ? d.data : ''
+        analysisText.value = raw.replace(/\\n/g, '\n')
+    } finally {
+        analyzeLoading.value = false
+    }
+}
+
 onMounted(() => {
     fetchDetail()
     fetchExamHistory()