feat(frontend): profile panel about one person with real changes, shared groups, joins and leaves and deleted messages

frontend/src/lib/format/datetime.ts

@@ -1,6 +1,7 @@
 import { locale } from "#lib/i18n/locale.svelte.js";
 
 const OPTIONS = {
+  date: { day: "numeric", month: "short", year: "numeric" },
   day: { day: "numeric", month: "short" },
   full: {
     day: "numeric",
@@ -38,6 +39,10 @@ export function formatDay(iso: string): string {
   return format("day", new Date(iso));
 }
 
+export function formatDate(iso: string): string {
+  return format("date", new Date(iso));
+}
+
 export function formatFull(iso: string): string {
   return format("full", new Date(iso));
 }