fix(audit): UI — L18 (decorative emoji -> Lucide icons), L19 (gated NotesList timer + create-from-url ref-in-effect)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/documents/hub-root-view.tsx

@@ -2,7 +2,7 @@
 
 import { useState } from 'react';
 import Link from 'next/link';
-import { FileText, ClipboardSignature } from 'lucide-react';
+import { FileText, ClipboardSignature, Folder } from 'lucide-react';
 
 import { usePaginatedQuery } from '@/hooks/use-paginated-query';
 import { StatusPill, type StatusPillStatus } from '@/components/ui/status-pill';
@@ -153,7 +153,7 @@ export function HubRootView({ portSlug }: Props) {
                           href={`/${portSlug}/documents?folderId=${f.folderId}` as any}
                           className="inline-flex items-center gap-1 hover:underline"
                         >
-                          <span aria-hidden>📁</span>
+                          <Folder className="h-3 w-3" aria-hidden />
                           {f.folderName}
                         </Link>
                       ) : null}