ui: polish navbar visibility and home page greetings

Hide My Schedule link from admin users (they have dashboard instead).
Add 60+ randomized greeting strings split between returning and new users.
Update dev script admin seed name.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/src/routes/+page.svelte

@@ -3,6 +3,83 @@
 	import PortfolioCarousel from '$lib/components/layout/PortfolioCarousel.svelte';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import { Skeleton } from '$lib/components/ui/skeleton';
+
+	const returningGreetings = [
+		(name: string) => `Welcome back, ${name}!`,
+		(name: string) => `Great to see you again, ${name}!`,
+		(name: string) => `Good to have you back, ${name}!`,
+		(name: string) => `Hey, you're back, ${name}!`,
+		(name: string) => `Lovely to see you again, ${name}!`,
+		(name: string) => `We missed you, ${name}!`,
+		(name: string) => `${name}, it's so good to see you!`,
+		(name: string) => `${name}, welcome back to Crussell Nails!`,
+		(name: string) => `Always a pleasure, ${name}!`,
+		(name: string) => `${name}, you're a sight for sore eyes!`,
+		(name: string) => `So happy you're back, ${name}!`,
+		(name: string) => `You're back! Great to see you, ${name}!`,
+		(name: string) => `${name}, you've been missed!`,
+		(name: string) => `Ready for some pampering, ${name}?`,
+		(name: string) => `${name}, lovely to have you back with us!`,
+		(name: string) => `Great to have you back, ${name}!`,
+		(name: string) => `Back for more, ${name}?`,
+		(name: string) => `Ah, ${name}! Right on time!`,
+		(name: string) => `Welcome home, ${name}!`,
+		(name: string) => `${name}, we've been looking forward to seeing you!`,
+		(name: string) => `It's always a good day when ${name} walks in!`,
+		(name: string) => `${name}, your favourite nail artist is waiting!`,
+		(name: string) => `How wonderful to see you, ${name}!`,
+		(name: string) => `${name}, you're as welcome as ever!`,
+		(name: string) => `Another visit, ${name}? You spoil us!`,
+		(name: string) => `${name}, you always brighten up our day!`,
+		(name: string) => `Great timing, ${name} — let's get started!`,
+		(name: string) => `${name}, you deserve every bit of this!`,
+		(name: string) => `So glad you're here again, ${name}!`,
+		(name: string) => `Look who it is — the wonderful ${name}!`
+	];
+
+	const unverifiedGreetings = [
+		(name: string) => `Welcome, ${name}!`,
+		(name: string) => `Hi, ${name}! Great to meet you!`,
+		(name: string) => `Hey ${name}, welcome aboard!`,
+		(name: string) => `Hello, ${name}! Lovely to have you here!`,
+		(name: string) => `Good to meet you, ${name}!`,
+		(name: string) => `${name}, welcome to Crussell Nails!`,
+		(name: string) => `Hi ${name}, we're so glad you're here!`,
+		(name: string) => `Welcome in, ${name}!`,
+		(name: string) => `${name}, it's great to have you with us!`,
+		(name: string) => `Hello ${name}, glad you found us!`,
+		(name: string) => `${name}, welcome — you're going to love it here!`,
+		(name: string) => `Nice to meet you, ${name}!`,
+		(name: string) => `${name}, welcome to the family!`,
+		(name: string) => `Hey ${name}, so happy to have you here!`,
+		(name: string) => `${name}, you've come to the right place!`,
+		(name: string) => `Welcome, ${name} — we're thrilled to have you!`,
+		(name: string) => `${name}, let's get you pampered!`,
+		(name: string) => `Great to have you here, ${name}!`,
+		(name: string) => `${name}, welcome — something beautiful awaits!`,
+		(name: string) => `${name}, your journey to great nails starts here!`,
+		(name: string) => `So excited to have you here, ${name}!`,
+		(name: string) => `${name}, we can't wait to show you what we do!`,
+		(name: string) => `A big welcome to you, ${name}!`,
+		(name: string) => `${name}, we're so glad you chose Crussell Nails!`,
+		(name: string) => `Hi ${name}, you're in great hands here!`,
+		(name: string) => `${name}, this is the beginning of something beautiful!`,
+		(name: string) => `Welcome ${name} — you picked the perfect place!`,
+		(name: string) => `${name}, we love meeting new faces!`,
+		(name: string) => `${name}, we're delighted to have you with us!`,
+		(name: string) => `Hello ${name}, great things are ahead!`,
+		(name: string) => `${name}, we're already excited to look after you!`,
+		(name: string) => `Welcome ${name} — you're going to fit right in!`,
+		(name: string) => `So glad you're here, ${name}!`,
+		(name: string) => `${name}, you've made an excellent choice today!`,
+		(name: string) => `Welcome to the club, ${name}!`
+	];
+
+	function getRandomGreeting(name: string, isReturning: boolean): string {
+		const greetings = isReturning ? returningGreetings : unverifiedGreetings;
+		const randomIndex = Math.floor(Math.random() * greetings.length);
+		return greetings[randomIndex](name);
+	}
 </script>
 
 <svelte:head>
@@ -29,9 +106,9 @@
 			{#if !authStore.isAuthenticated}
 				Welcome to Crussell Nails
 			{:else if authStore.currentUser?.role === 'unverified_email'}
-				Welcome {authStore.currentUser?.firstName}
+				{getRandomGreeting(authStore.currentUser?.firstName || '', false)}
 			{:else}
-				Welcome back {authStore.currentUser?.firstName}
+				{getRandomGreeting(authStore.currentUser?.firstName || '', true)}
 			{/if}
 		</h1>
 		<p class="mb-8 text-lg text-gray-600">