refactor login page, change routes to token-based, add service classes

src/lib/components/Header.svelte

@@ -0,0 +1,36 @@
+<script lang="ts">
+	import Chevron from '$lib/icons/Chevron-right.svelte';
+
+	export let data;
+</script>
+
+<div class="flex flex-col">
+	<header class="flex-none relative isolate z-10 bg-white px-8">
+		<nav
+			class="mx-auto flex max-w-7xl items-center justify-between p-6 lg:px-8"
+			aria-label="Global"
+		>
+			<div class="flex w-48">
+				<a href="/" class="-m-1.5 p-1.5 w-10">
+					<span class="sr-only">Tatort Niedersachen</span>
+					<img class="h-8 w-auto" src="/Landeswappen_NI.svg" alt="Landeswappen Niedersachsen" />
+				</a>
+			</div>
+			<h1 class="text-3xl text-slate-400 font-bold">Tatort</h1>
+			<div class="lg:flex lg:justify-end w-48">
+				{#if data.user}
+					<form method="POST" action="/anmeldung?/logout">
+						<input type="hidden" />
+						<button type="submit" class="text-sm font-semibold leading-6 text-gray-900"
+							><span
+								><span class="align-middle inline-block">Abmelden</span><span
+									class="align-middle inline-block"><Chevron /></span
+								></span
+							></button
+						>
+					</form>
+				{/if}
+			</div>
+		</nav>
+	</header>
+</div>