初始化游戏小组管理系统后端项目

- 基于 NestJS + TypeScript + MySQL + Redis 架构
- 完整的模块化设计（认证、用户、小组、游戏、预约等）
- JWT 认证和 RBAC 权限控制系统
- Docker 容器化部署支持
- 添加 CLAUDE.md 项目开发指南
- 配置 .gitignore 忽略文件

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/entities/asset.entity.ts

@@ -0,0 +1,60 @@
+import {
+  Entity,
+  PrimaryGeneratedColumn,
+  Column,
+  CreateDateColumn,
+  UpdateDateColumn,
+  ManyToOne,
+  JoinColumn,
+  OneToMany,
+} from 'typeorm';
+import { AssetType, AssetStatus } from '../common/enums';
+import { Group } from './group.entity';
+import { AssetLog } from './asset-log.entity';
+
+@Entity('assets')
+export class Asset {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column()
+  groupId: string;
+
+  @ManyToOne(() => Group, { onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'groupId' })
+  group: Group;
+
+  @Column({ type: 'enum', enum: AssetType })
+  type: AssetType;
+
+  @Column({ length: 100 })
+  name: string;
+
+  @Column({ type: 'text', nullable: true, comment: '描述' })
+  description: string;
+
+  @Column({ type: 'text', nullable: true, comment: '加密的账号凭据' })
+  accountCredentials?: string | null;
+
+  @Column({ default: 1, comment: '数量（用于物品）' })
+  quantity: number;
+
+  @Column({
+    type: 'enum',
+    enum: AssetStatus,
+    default: AssetStatus.AVAILABLE,
+  })
+  status: AssetStatus;
+
+  @Column({ type: 'varchar', nullable: true, comment: '当前借用人ID' })
+  currentBorrowerId?: string | null;
+
+  @CreateDateColumn()
+  createdAt: Date;
+
+  @UpdateDateColumn()
+  updatedAt: Date;
+
+  @OneToMany(() => AssetLog, (log) => log.asset)
+  logs: AssetLog[];
+}