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/app/onboarding/page.tsx

@@ -96,7 +96,7 @@ export default function OnboardingPage() {
       <main className="flex items-center justify-center px-4 py-12">
         <div className="w-full max-w-lg">
         <div className="mb-8 text-center">
-          <a href={marketplaceUrl} className="text-xs font-semibold uppercase tracking-widest text-blue-600">RentalDriveGo</a>
+          <a href={marketplaceUrl} className="text-xs font-semibold uppercase tracking-widest text-blue-600">FleetOS</a>
           <h1 className="mt-2 text-3xl font-bold text-slate-900">Set up your account</h1>
           <p className="mt-1 text-sm text-slate-500">Step {step} of 3</p>
         </div>
@@ -251,7 +251,7 @@ export default function OnboardingPage() {
                   checked={payments.isListedOnMarketplace}
                   onChange={(e) => setPayments({ ...payments, isListedOnMarketplace: e.target.checked })}
                 />
-                <span className="text-sm text-slate-700">List my company on the RentalDriveGo marketplace</span>
+                <span className="text-sm text-slate-700">List my company on the FleetOS marketplace</span>
               </label>
               <div className="flex gap-3">
                 <button onClick={() => setStep(2)} className="btn-secondary flex-1 justify-center">Back</button>