feat: 添加通关时间记录功能

客户端上报通关时间（秒），存储到 wx_user_level_progress 表

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/modules/auth/auth.service.ts

@@ -146,6 +146,7 @@ export class AuthService {
     const progress = this.userLevelProgressRepository.create({
       userId,
       levelId: dto.levelId,
+      timeSpent: dto.timeSpent,
     });
     await this.userLevelProgressRepository.save(progress);
 

src/modules/auth/dto/user-assets.dto.ts

@@ -34,6 +34,10 @@ export class EarnPointRequestDto {
   @IsString()
   @IsNotEmpty()
   levelId!: string;
+
+  @ApiProperty({ description: '通关时间（秒）' })
+  @IsNotEmpty()
+  timeSpent!: number;
 }
 
 export class GameDataResponseDto {

src/modules/auth/entities/user-level-progress.entity.ts

@@ -25,6 +25,9 @@ export class UserLevelProgress {
   @JoinColumn({ name: 'user_id' })
   user!: User;
 
+  @Column({ type: 'int', name: 'time_spent', default: 0 })
+  timeSpent!: number;
+
   @CreateDateColumn({ name: 'completed_at' })
   completedAt!: Date;
 }