feat: 添加历史管理和用户评估记录API

- GET /assessment/history: 获取用户评估历史(保留最近100条)
- cleanupOldSessions: 保持最多3条记录(在创建新session时自动清理)
- 复查记录保留完整历史(reviewHistory)

server/src/assessment/assessment.controller.ts

@@ -135,6 +135,15 @@ export class AssessmentController {
     return this.assessmentService.generateCertificate(sessionId, userId, tenantId);
   }
 
+  @Get('history')
+  @ApiOperation({ summary: 'Get current user assessment history (keep latest 3)' })
+  async getHistory(
+    @Request() req: any,
+  ) {
+    const { id: userId } = req.user;
+    return this.assessmentService.getUserHistory(userId);
+  }
+
   @Get('stats')
   @ApiOperation({ summary: 'Get assessment statistics for admin' })
   async getStats(

server/src/assessment/assessment.service.ts

@@ -553,6 +553,9 @@ private async getModel(tenantId: string): Promise<ChatOpenAI> {
     this.logger.log(
       `[startSession] Session ${savedSession.id} created and saved`,
     );
+
+    this.cleanupOldSessions(userId);
+
     return savedSession;
   }
 
@@ -1487,4 +1490,29 @@ const initialState: Partial<EvaluationState> = {
 
     return session;
   }
+
+  async getUserHistory(userId: string): Promise<AssessmentSession[]> {
+    const sessions = await this.sessionRepository.find({
+      where: { userId, status: AssessmentStatus.COMPLETED },
+      order: { createdAt: 'DESC' },
+      take: 100,
+      relations: ['template'],
+    });
+    return sessions;
+  }
+
+  private async cleanupOldSessions(userId: string): Promise<void> {
+    const sessions = await this.sessionRepository.find({
+      where: { userId },
+      order: { createdAt: 'DESC' },
+    });
+
+    if (sessions.length > 3) {
+      const toDelete = sessions.slice(3);
+      for (const session of toDelete) {
+        await this.sessionRepository.remove(session);
+      }
+      this.logger.log(`[cleanupOldSessions] Deleted ${toDelete.length} old sessions for user ${userId}`);
+    }
+  }
 }