/search — query USD Search

Stage 3 → 4 → 5 of the /quickstart journey: take the user's text and/or image input, run hybrid search against the USD Search API, and present ranked thumbnails.

Be terse. Run the query, save thumbnails, show them, stop. No per-curl narration. Before asking for any *_API_KEY, grep ~/.zshrc ~/.zshenv ~/.zprofile ~/.profile ~/.bashrc ~/.bash_profile ~/.env* for export <NAME>=; if absent, ask the user to export it themselves — never accept a pasted secret.