Add shared error codes with zh/en/ms messages, coded app exceptions, and locale-aware global filter. Frontends send X-Locale so error text matches the active UI language. Co-authored-by: Cursor <cursoragent@cursor.com>
新增代理管理器与二级代理体系，完善信用额度/上下分上下文与冻结策略；代理端玩家与子代理管理增强；玩家端新增钱包详情页与交易筛选优化。 Co-authored-by: Cursor <cursoragent@cursor.com>
包含 NestJS 后端、三端前端、Prisma 数据模型、结算引擎测试与 PRD 文档。 Co-authored-by: Cursor <cursoragent@cursor.com>
