feat(student): 添加学习分析功能组件及相关交互

- 在班级页面列表操作栏增加“学情分析”按钮，点击弹出学情分析对话框
- 新增StudyAnalysis组件，封装学习分析生成与展示逻辑
- 学生详情页替换原有学习分析区域，统一使用StudyAnalysis组件
- 移除学生页原有学习分析相关状态管理和接口调用，简化代码
- 通过定时器模拟加载进度条，提升生成学习分析时的用户体验

enlish-vue/src/pages/student.vue

@@ -49,26 +49,7 @@
                         <div class="text-md font-semibold mb-3">词汇掌握热力图</div>
                         <WordMasteryHeatmap :student-id="route.params.id" :columns="50" />
                     </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="analyzeLoading">
-                            <div class="space-y-2">
-                                <el-progress :percentage="analyzeProgress" :stroke-width="10" />
-                                <div class="text-sm text-gray-500 dark:text-gray-400">正在生成学习分析，请稍候…</div>
-                            </div>
-                        </template>
-                        <template v-else-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>
+                    <StudyAnalysis :student-id="route.params.id" />
                 </div>
             </el-main>
 
@@ -80,31 +61,19 @@
 import Header from '@/layouts/components/Header.vue'
 import { ref, onMounted, computed } from 'vue'
 import { useRoute } from 'vue-router'
-import { getStudentDetail, getStudentStudyAnalyze } from '@/api/student'
+import { getStudentDetail } from '@/api/student'
 import { getStudentExamHistory } from '@/api/exam'
 import { getWordStudentDetail } from '@/api/words'
 import ExamHistoryChart from '@/layouts/components/student/ExamHistoryChart.vue'
 import PlanHistoryChart from '@/layouts/components/student/PlanHistoryChart.vue'
 import WordMasteryHeatmap from '@/layouts/components/student/WordMasteryHeatmap.vue'
-import MarkdownIt from 'markdown-it'
+import StudyAnalysis from '@/layouts/components/student/StudyAnalysis.vue'
 
 const loading = ref(false)
 const detail = ref(null)
 const route = useRoute()
 const history = ref([])
-const analyzeLoading = ref(false)
-const analyzeProgress = ref(0)
-let analyzeTimer = null
-const analysisText = ref('')
 const wordStat = ref(null)
-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
@@ -129,37 +98,6 @@ async function fetchExamHistory() {
     }) : []
 }
 
-async function fetchStudyAnalyze() {
-    const id = route.params.id
-    if (!id) return
-    analyzeLoading.value = true
-    analyzeProgress.value = 0
-    if (analyzeTimer) {
-        clearInterval(analyzeTimer)
-        analyzeTimer = null
-    }
-    analyzeTimer = setInterval(() => {
-        const inc = Math.floor(Math.random() * 8) + 3
-        const next = analyzeProgress.value + inc
-        analyzeProgress.value = next >= 90 ? 90 : next
-    }, 300)
-    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 {
-        analyzeProgress.value = 100
-        if (analyzeTimer) {
-            clearInterval(analyzeTimer)
-            analyzeTimer = null
-        }
-        analyzeLoading.value = false
-    }
-}
-
 async function fetchWordStat() {
     const id = route.params.id
     if (!id) return