How can we fix hydration mismatches when mixing legacy Express middleware with new NestJS v11 boilerplates?

import { Injectable, NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';

@Injectable()
export class UserContextInterceptor implements NestInterceptor {
  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
    const req = context.switchToHttp().getRequest();
    req.user = getUserFromReq(req);  // Instead of modifying res.locals

    return next.handle();
  }
}

// Apply globally in main.ts
app.useGlobalInterceptors(new UserContextInterceptor());