Fix import redirect path: use hash routing (#guide/{source})
The import app uses hash-based routing, not path-based. The muse
redirect commands were pointing to /app/import/source/{source}
which doesn't exist as a Flask route. Corrected to
/app/import#guide/{source} which the frontend handles.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>