fix: jwt-auth.guard handleRequest wrong signature causing null.switchToHttp crash

backend/src/auth/jwt-auth.guard.ts

@@ -1,4 +1,4 @@
-import { Injectable, CanActivate, ExecutionContext, Logger } from '@nestjs/common';
+import { Injectable, CanActivate, ExecutionContext, Logger, UnauthorizedException } from '@nestjs/common';
 import { Observable } from 'rxjs';
 import { Reflector } from '@nestjs/core';
 import { AuthGuard } from '@nestjs/passport';
@@ -21,15 +21,14 @@ export class JwtAuthGuard extends AuthGuard('jwt') {
     return super.canActivate(context);
   }
 
-  // Add logging for user ID in the JWT authentication guard
-  handleRequest(context: ExecutionContext, next: Function) {
-    const request = context.switchToHttp().getRequest();
-    const user = request.user;
-
-    if (user) {
-      this.logger.log(`User ID: ${user.userId}, Username: ${user.username}`);
+  // Log authenticated user ID for diagnostics
+  handleRequest<TUser = any>(err: any, user: TUser, info: any): TUser {
+    if (err || !user) {
+      throw err || new UnauthorizedException();
     }
-
-    return next();
+    if (user) {
+      this.logger.log(`Authenticated user ID: ${(user as any).userId}`);
+    }
+    return user;
   }
 }