feat: Complete NestJS backend scaffold — 22 modules, 39 entities, WebSocket gateway

Full backend rewrite from Rust/Axum to NestJS/TypeScript.
- 22 feature modules (auth, servers, wipes, maps, plugins, players, console,
  chat, team, notifications, settings, schedules, analytics, alerts, status,
  store, webstore, admin, setup, migration, users, licenses)
- 39 TypeORM entities matching PostgreSQL schema (12 migrations)
- Common infrastructure: JWT/RBAC guards, decorators, exception filter
- NATS service with pub/sub/request-reply
- Socket.IO WebSocket gateway with NATS bridge
- Docker: NestJS Dockerfile + updated docker-compose.yml
- Zero compile errors (npx tsc --noEmit clean)

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

backend-nest/src/main.ts

@@ -0,0 +1,50 @@
+import { NestFactory } from '@nestjs/core';
+import { ValidationPipe } from '@nestjs/common';
+import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { AppModule } from './app.module';
+import { HttpExceptionFilter } from './common/filters/http-exception.filter';
+import { TransformInterceptor } from './common/interceptors/transform.interceptor';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+
+  // Global prefix — all routes under /api
+  app.setGlobalPrefix('api');
+
+  // Global validation pipe
+  app.useGlobalPipes(
+    new ValidationPipe({
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      transform: true,
+      transformOptions: { enableImplicitConversion: true },
+    }),
+  );
+
+  // Global exception filter
+  app.useGlobalFilters(new HttpExceptionFilter());
+
+  // Global response transform
+  app.useGlobalInterceptors(new TransformInterceptor());
+
+  // CORS
+  app.enableCors({
+    origin: process.env.FRONTEND_URL || 'http://localhost:5174',
+    credentials: true,
+  });
+
+  // Swagger
+  const swaggerConfig = new DocumentBuilder()
+    .setTitle('Corrosion API')
+    .setDescription('Corrosion Admin Panel — Game Server Management Platform')
+    .setVersion('1.0')
+    .addBearerAuth()
+    .build();
+  const document = SwaggerModule.createDocument(app, swaggerConfig);
+  SwaggerModule.setup('api/docs', app, document);
+
+  const port = process.env.API_PORT || 3000;
+  await app.listen(port);
+  console.log(`Corrosion API running on port ${port}`);
+}
+bootstrap();