Third-party code is now kept separate from the app's own js/ modules.
Updated js/config.js's MARKED_URL to the new sibling-directory path
(../vendor/marked.min.js) and the README's project structure diagram
accordingly.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AXSVPS3UmmASiiprPfcnUd
