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/admin/admin.module.ts

@@ -0,0 +1,29 @@
+import { Module } from '@nestjs/common';
+import { AdminController } from './admin.controller';
+import { UsersModule } from '../../domains/identity/users.module';
+import { AgentsModule } from '../../domains/agent/agents.module';
+import { WalletModule } from '../../domains/ledger/wallet.module';
+import { MatchesModule } from '../../domains/catalog/matches.module';
+import { MarketsModule } from '../../domains/odds/markets.module';
+import { SettlementModule } from '../../domains/settlement/settlement.module';
+import { CashbackModule } from '../../domains/operations/cashback/cashback.module';
+import { ContentModule } from '../../domains/operations/content/content.module';
+import { I18nModule } from '../../domains/operations/i18n/i18n.module';
+import { BetsModule } from '../../domains/betting/bets.module';
+
+@Module({
+  imports: [
+    UsersModule,
+    AgentsModule,
+    WalletModule,
+    MatchesModule,
+    MarketsModule,
+    SettlementModule,
+    CashbackModule,
+    ContentModule,
+    I18nModule,
+    BetsModule,
+  ],
+  controllers: [AdminController],
+})
+export class AdminModule {}