Move the Gaze marketing home from the legacy /marketing/gaze route to
a dedicated gaze subdomain landing page (src/routes/gaze). The new page
adds a richer hero, feature highlights, and a direct .dmg download flow
that resolves a signed S3 URL via the tRPC downloads.getDownloadUrl
endpoint.
Extract the download-resolution logic into a shared, testable
downloadAsset helper (src/lib/download-asset) so current and future
subdomain landing pages (InputHalo, Lineage, …) share one code path.
The helper is pure over an injected DownloadApi + redirect sink, keeping
it unit-testable without importing solid-js / CSRF cookie code.
Replace the old marketing/gaze route with a permanent 308 redirect to
https://gaze.freno.me so existing inbound links keep resolving to the
canonical home.
Add unit tests covering the tRPC call shape, redirect sink, and error
handling.
