* docs(site): redesign the Download page around a release picker
One Downloads window instead of five sections. A Nightly / Latest / Older
releases picker (buttons plus a select, progressive enhancement) switches
between per-release panels rendered by build_site.py; without JS the latest
release shows with links to the GitHub release list. App and core builds are
grouped by platform then arch with generic inline-SVG glyphs; the core's long
tail is collapsed per platform. The installer one-liners become a compact tabbed
widget that adds --channel for the chosen release, and tools get a proper table.
fetch_releases also fetches the last 10 tagged releases; --releases accepts an
optional older[] list. Adds scripts/check_downloads.py, an offline fixture under
scripts/testdata and a CI step that builds from it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
* docs(site): end the releases.json fixture with a newline (EditorConfig)
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Co-authored-by: Claude Opus 5.5 <[email protected]>
