课程库 Excel 导入导出已完成：

支持下载标准导入模板。
导出严格沿用当前关键词、学院、分类、课程性质和状态筛选。
以课程编码为唯一键：存在则更新，不存在则新增。
校验学院编码、课程分类、课程性质、学分学时及考核方式。
整批原子导入，任一行错误则全部不写入，并提示具体行号。
学院管理员仍只能维护本学院的专业课和实践课，无法借 Excel 越权。
界面入口沿用现有课程库工具栏样式。

web/src/views/GraduationAuditsView.vue

@@ -155,7 +155,7 @@ onMounted(load)
         </div>
         <div class="certificate-metrics">
           <div><span>学分完成</span><b>{{ myResult.earnedCredits }} / {{ myResult.requiredCredits }}</b><el-progress :percentage="percent(myResult.earnedCredits, myResult.requiredCredits)" :show-text="false" /></div>
-          <div><span>必修课程</span><b>{{ myResult.passedRequiredCourseCount }} / {{ myResult.requiredCourseCount }}</b><p>已通过 / 应通过</p></div>
+          <div><span>必修要求</span><b>{{ myResult.passedRequiredCourseCount }} / {{ myResult.requiredCourseCount }}</b><p>已完成 / 应完成</p></div>
           <div><span>未解决不及格</span><b>{{ myResult.failedCourseCount }}</b><p>门课程</p></div>
         </div>
         <footer>
@@ -206,7 +206,7 @@ onMounted(load)
           <article v-for="row in filteredResults" :key="row.id">
             <div class="graduation-student"><span>{{ row.studentNumber }} · {{ row.className }}</span><h4>{{ row.name }}</h4><p>{{ row.majorName }} · {{ row.planName || '未匹配培养方案' }}</p></div>
             <div class="credit-progress"><span>学分完成度</span><b>{{ row.earnedCredits }} / {{ row.requiredCredits }}</b><el-progress :percentage="percent(row.earnedCredits, row.requiredCredits)" :show-text="false" /></div>
-            <div class="course-clearance"><span>必修通过</span><b>{{ row.passedRequiredCourseCount }} / {{ row.requiredCourseCount }}</b><small v-if="row.missingCourseNames">缺：{{ row.missingCourseNames }}</small><small v-else>必修项目已完成</small></div>
+            <div class="course-clearance"><span>必修要求</span><b>{{ row.passedRequiredCourseCount }} / {{ row.requiredCourseCount }}</b><small v-if="row.missingCourseNames">缺：{{ row.missingCourseNames }}</small><small v-else>指定必修与课程组均已完成</small></div>
             <div class="graduation-conclusion" :class="{ eligible: row.conclusion === 'Eligible' }"><el-icon><Check /></el-icon><span>{{ conclusionLabels[row.conclusion] }}</span><small v-if="row.isOverridden">人工复核</small><small v-else>规则计算</small></div>
             <el-button v-if="selected.status === 'Draft'" link type="primary" @click="openDecision(row)">人工复核</el-button>
           </article>