chore: misc updates and fixes

- lib/utils.ts: Add getArchetypeDisplayChar helper (duplicate of src/lib)
- globals.css: Style updates
- swarm-command-feed.tsx: Component updates
- telemetry-grid.tsx: Use getArchetypeDisplayChar
- test-watcher.ts: Test utility updates

lib/utils.ts

@@ -4,3 +4,7 @@ import { twMerge } from "tailwind-merge";
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+export function getArchetypeDisplayChar(archetype: { icon?: string; name: string }): string {
+    return archetype.icon || archetype.name.charAt(0) || '?';
+}