/**
 * Derives a URL-friendly slug from a display name.
 * Lowercases, collapses non-alphanumeric runs to hyphens, strips leading/trailing hyphens.
 *
 * Examples:
 *   "My Cool Category" → "my-cool-category"
 *   "  Off-Topic Chat! " → "off-topic-chat"
 */
export function deriveSlug(name: string): string {
  return name
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/^-|-$/g, "");
}