improvement: error handeling structure changed and unified all across the app. user no longer sees inappropriate messages.

backend/src/common/guards/clinic-org.guard.ts

@@ -1,11 +1,12 @@
 import {
   CanActivate,
   ExecutionContext,
+  HttpStatus,
   Injectable,
-  UnauthorizedException,
 } from '@nestjs/common';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { assertClinicOrganization } from '../../common/organization-type';
+import { AppException, ErrorCode } from '../errors';
 
 @Injectable()
 export class ClinicOrgGuard implements CanActivate {
@@ -16,7 +17,7 @@ export class ClinicOrgGuard implements CanActivate {
     const organizationId = request.user?.organizationId;
 
     if (!organizationId) {
-      throw new UnauthorizedException('Organization is not selected');
+      throw new AppException(ErrorCode.AUTH_ORG_NOT_SELECTED, HttpStatus.UNAUTHORIZED);
     }
 
     await assertClinicOrganization(this.prisma, organizationId);