Fix: Update all components to match Synthwave design showcase

Co-authored-by: Junie <junie@jetbrains.com>

frontend/src/app/components/contacts/contacts.component.ts

@@ -1,13 +1,12 @@
 import { Component, inject, signal } from '@angular/core';
 import { FormsModule } from '@angular/forms';
-import { CommonModule } from '@angular/common';
 import { MailService } from '../../services/mail.service';
 import { Contact } from '../../models/mail.models';
 
 @Component({
   selector: 'app-contacts',
   standalone: true,
-  imports: [FormsModule, CommonModule],
+  imports: [FormsModule],
   providers: [MailService],
   templateUrl: './contacts.component.html',
   styles: ``