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/modules/notifications/notifications.controller.ts

@@ -0,0 +1,48 @@
+import { Controller, Get, Put, Body, UseGuards } from '@nestjs/common';
+import {
+  ApiTags,
+  ApiBearerAuth,
+  ApiOperation,
+  ApiResponse,
+} from '@nestjs/swagger';
+import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
+import { CurrentTenant } from '../../common/decorators/current-tenant.decorator';
+import { NotificationsService } from './notifications.service';
+import { UpdateConfigDto } from './dto/update-config.dto';
+
+@ApiTags('notifications')
+@ApiBearerAuth()
+@UseGuards(JwtAuthGuard)
+@Controller('notifications')
+export class NotificationsController {
+  constructor(private readonly notificationsService: NotificationsService) {}
+
+  @Get('config')
+  @ApiOperation({
+    summary: 'Get notification configuration',
+    description: 'Returns notification settings for this license',
+  })
+  @ApiResponse({
+    status: 200,
+    description: 'Notification config retrieved successfully',
+  })
+  async getConfig(@CurrentTenant() licenseId: string) {
+    return await this.notificationsService.getConfig(licenseId);
+  }
+
+  @Put('config')
+  @ApiOperation({
+    summary: 'Update notification configuration',
+    description: 'Update notification settings for this license',
+  })
+  @ApiResponse({
+    status: 200,
+    description: 'Notification config updated successfully',
+  })
+  async updateConfig(
+    @CurrentTenant() licenseId: string,
+    @Body() dto: UpdateConfigDto,
+  ) {
+    return await this.notificationsService.updateConfig(licenseId, dto);
+  }
+}