working on vcard display

frontend/src/routes/contact/ExtraField.svelte

@@ -0,0 +1,14 @@
+<script>
+    import { extra } from '../../vcard.js';
+
+    let { code } = $props();
+
+    let field = $derived(extra(code));
+
+</script>
+
+{#if field}
+<span class={field.name}>
+    {field.value}
+</span>
+{/if}