show toast when direct invitation link is copied

src/components/toast/Toast.svelte

@@ -0,0 +1,13 @@
+<script lang="ts">
+  import { dismissToast, toasts } from '@components/toast/Toast.ts';
+  import { fly } from 'svelte/transition';
+</script>
+
+<div class="toast toast-end toast-bottom z-[9999]">
+  {#each $toasts as toast (toast.id)}
+    <div class="alert" role="status" aria-live="polite" transition:fly={{ y: 8, duration: 150 }}>
+      <span>{toast.message}</span>
+      <button class="cursor-pointer" onclick={() => dismissToast(toast.id)} aria-label="Schließen">✕</button>
+    </div>
+  {/each}
+</div>