feat: add employee email verification on signup

- Signup sends verification email instead of auto-login; login blocks unverified emails
- New endpoints: POST /verify-email and POST /resend-verification
- New verify-email page in dashboard with token-based email confirmation
- DB migration adds emailVerified and emailVerificationToken fields to Employee
- Update sign-in/sign-up/reset-password flows to handle verification states
- Minor UI polish across dashboard and marketplace components
- Refactor marketplace-homepage types

apps/dashboard/src/components/layout/Sidebar.tsx

@@ -401,7 +401,7 @@ export default function Sidebar() {
             )}
           </div>
           <span className="truncate bg-gradient-to-br from-blue-950 to-blue-600 bg-clip-text text-sm font-semibold tracking-[-0.01em] text-transparent dark:from-slate-100 dark:to-blue-300">
-            {brand?.displayName ?? 'RentalDriveGo'}
+            {brand?.displayName ?? 'FleetOS'}
           </span>
         </a>