Add a clickable launch-video poster (linking to YouTube) directly after
the intro note and before the architecture diagrams. GitHub Markdown can
not embed a YouTube player, so the poster image links out instead.
The star-history refresh workflow committed the API's SVG verbatim, but the
response has no trailing newline. Because the refresh commit uses [skip ci],
the file never ran end-of-file-fixer at commit time, so pre-commit's
`--all-files` run failed end-of-file-fixer on every open PR (e.g. #240), even
PRs that never touched the file.
Normalize the downloaded SVG to exactly one trailing newline in the workflow
(idempotent, so the "unchanged" guard still works), and fix the currently
committed file so open PRs go green now.
Point the README chart at a committed assets/star-history.svg instead of
the star-history API URL so GitHub serves it directly and bypasses the Camo
proxy cache. A scheduled workflow regenerates the SVG at 06:00/18:00 UTC,
busting star-history's server-side cache, and commits it when it changes.
Replace the PNG mascot with the refined "C" SVG (light + dark variants)
and enlarge the nav logo from 32px to 56px so it reads at a glance.
Also drop the same SVG pair into assets/ for repo-wide reuse.
