重构 API 为 8 领域 + 应用层架构

将后端模块拆分为 domains、applications、shared 三层，结算计算器移入 domain 纯函数目录，API 路径与测试保持不变。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/applications/player/player.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { PlayerController } from './player.controller';
+import { UsersModule } from '../../domains/identity/users.module';
+import { WalletModule } from '../../domains/ledger/wallet.module';
+import { MatchesModule } from '../../domains/catalog/matches.module';
+import { BetsModule } from '../../domains/betting/bets.module';
+import { ContentModule } from '../../domains/operations/content/content.module';
+import { CashbackModule } from '../../domains/operations/cashback/cashback.module';
+
+@Module({
+  imports: [UsersModule, WalletModule, MatchesModule, BetsModule, ContentModule, CashbackModule],
+  controllers: [PlayerController],
+})
+export class PlayerModule {}