feat: 为批量归档补充批量恢复

apps/server/src/students/students.service.ts

@@ -219,6 +219,30 @@ export class StudentsService {
     return { message: '已恢复' };
   }
 
+  async batchRestore(ids: number[]) {
+    const uniqueIds = [...new Set(ids || [])];
+    if (uniqueIds.length === 0) throw new BadRequestException('请选择要恢复的学生');
+    if (uniqueIds.some((id) => !Number.isInteger(id) || id <= 0)) {
+      throw new BadRequestException('学生 ID 无效');
+    }
+    const students = await this.repo.find({ where: { id: In(uniqueIds) } });
+    if (students.length !== uniqueIds.length) throw new NotFoundException('部分学生不存在');
+
+    const targetIds = students.filter((student) => student.status === 'archived').map((student) => student.id);
+    const skipped = students.length - targetIds.length;
+    let restored = 0;
+    if (targetIds.length > 0) {
+      const result = await this.repo
+        .createQueryBuilder()
+        .update()
+        .set({ status: 'active' })
+        .where('id IN (:...ids)', { ids: targetIds })
+        .execute();
+      restored = result.affected || 0;
+    }
+    return { message: `已批量恢复 ${restored} 名学生`, restored, skipped };
+  }
+
   async batchImport(importData: StudentWorkbookImport | StudentImportRow[]) {
     const data = this.normalizeImportData(importData);
     let imported = 0;