The "CLICK TO COPY" hint was absolute-positioned at top:10/right:14 of
the cmd-box, landing on top of "~/facere — bash" in the bar header.
Move the hint into the bar as a flex sibling so the title and hint
share the row cleanly without overlap.
Replace the placeholder install command with the real installer pulled
from raw.githubusercontent.com, with FACERE_GH_TOKEN as a
"contact us for demo" placeholder.
Also fix deploy/build.sh: `npm init -y` rejects the leading-dot dir
name `.build`, and the preset must be resolved by absolute path since
babel runs from the repo root.