improve timezone discovery

frontend/src/lib/utils.ts

@@ -4,3 +4,18 @@ import { twMerge } from "tailwind-merge";
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+export function getAvatarColor(name?: string): string {
+  const colors = [
+    'hsl(var(--tag-green))',
+    'hsl(var(--tag-blue))',
+    'hsl(var(--tag-orange))',
+    'hsl(var(--tag-purple))',
+    'hsl(var(--tag-brown))',
+  ];
+
+  if (!name) return colors[0];
+
+  const hash = name.split('').reduce((acc, char) => acc + char.charCodeAt(0), 0);
+  return colors[hash % colors.length];
+}