chore(config): update speaches config and ignore sveltekit dashboard

- Simplified .env.example to use localhost SPEACHES_URL
- Removed unused prod_url from SpeachesSettings config
- Added dashboard node_modules and build dirs to .gitignore
- Streamlines local development setup

dashboard/src/routes/+layout.svelte

@@ -0,0 +1,84 @@
+<script lang="ts">
+	import '../app.css';
+	import { page } from '$app/stores';
+	import { onMount } from 'svelte';
+
+	let { children } = $props();
+
+	type ThemeOverride = 'dark' | 'light' | null;
+	let override = $state<ThemeOverride>(null);
+	let systemDark = $state(true);
+
+	let isDark = $derived(override !== null ? override === 'dark' : systemDark);
+
+	$effect(() => {
+		document.documentElement.classList.toggle('dark', isDark);
+	});
+
+	function toggleTheme() {
+		const next = !isDark;
+		if (next === systemDark) {
+			override = null;
+			localStorage.removeItem('hold-slayer-theme');
+		} else {
+			override = next ? 'dark' : 'light';
+			localStorage.setItem('hold-slayer-theme', override);
+		}
+	}
+
+	onMount(() => {
+		const mq = window.matchMedia('(prefers-color-scheme: dark)');
+		systemDark = mq.matches;
+
+		const stored = localStorage.getItem('hold-slayer-theme');
+		if (stored === 'dark' || stored === 'light') {
+			override = stored as ThemeOverride;
+		}
+
+		const onSystemChange = (e: MediaQueryListEvent) => {
+			systemDark = e.matches;
+		};
+		mq.addEventListener('change', onSystemChange);
+		return () => mq.removeEventListener('change', onSystemChange);
+	});
+
+	const nav = [{ href: '/', label: 'Dashboard' }];
+</script>
+
+<div class="min-h-screen bg-slate-50 dark:bg-gray-950 text-gray-900 dark:text-gray-100">
+	<header
+		class="border-b border-gray-200 dark:border-gray-800 bg-white/80 dark:bg-gray-900/80 backdrop-blur sticky top-0 z-10"
+	>
+		<div class="mx-auto max-w-7xl px-4 py-3 flex items-center gap-6">
+			<div class="flex items-center gap-2">
+				<span class="text-orange-500 text-lg leading-none">🔥</span>
+				<span class="font-semibold text-gray-900 dark:text-white tracking-tight">Hold Slayer</span>
+				<span class="text-gray-500 text-sm hidden sm:inline">Gateway</span>
+			</div>
+			<nav class="flex gap-1 ml-2">
+				{#each nav as item}
+					<a
+						href={item.href}
+						class="px-3 py-1.5 rounded text-sm font-medium transition-colors {$page.url.pathname ===
+						item.href
+							? 'bg-orange-600 text-white'
+							: 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800'}"
+					>
+						{item.label}
+					</a>
+				{/each}
+			</nav>
+			<button
+				onclick={toggleTheme}
+				class="ml-auto text-xs px-2.5 py-1 rounded-full bg-gray-100 dark:bg-gray-800 text-gray-600 dark:text-gray-400 border border-gray-200 dark:border-gray-700 hover:bg-gray-200 dark:hover:bg-gray-700 transition-colors"
+				title={isDark ? 'Switch to light mode' : 'Switch to dark mode'}
+			>
+				{isDark ? 'Light' : 'Dark'}
+			</button>
+		</div>
+	</header>
+
+	<main class="mx-auto max-w-7xl px-4 py-6">
+		{@render children()}
+	</main>
+</div>