chore: fix all linting issues and optimize components

lib/config.ts

@@ -2,7 +2,7 @@
  * Centralized configuration management for the application.
  * This file provides a type-safe way to access environment variables.
  */
-import { env, getRawEnv } from './env';
+import { getRawEnv } from './env';
 
 let memoizedConfig: ReturnType<typeof createConfig> | undefined;
 

lib/mail/mailer.ts

@@ -1,7 +1,6 @@
 import nodemailer from 'nodemailer';
 import { getServerAppServices } from '@/lib/services/create-services.server';
 import { config } from '../config';
-import { ReactElement } from 'react';
 
 let transporterInstance: nodemailer.Transporter | null = null;