* feat(web): Linux-flavoured 404 page that sends visitors back
The static export served Next's default "404: This page could not be
found." with no way back into the site.
- "This page is not in your $PATH" heading, plus three true facts about
404 (chmod 404, exit 404 -> $? = 148, 0x194 / 0o624 / 0b110010100).
- "Did you mean ...?" suggests the closest page the site links to, by edit
distance after lowercasing. Catches typos and case slips, which matter
because GitHub Pages paths are case-sensitive.
- Back to home and Install buttons, plus quick links to the install
guides, FAQ, engine comparison, troubleshooting and changelog.
- Title "Page not found | Vocalinux", noindex.
* fix(web): keep the 404 page working on malformed URLs
decodeURIComponent throws on escapes like /%FF/, which replaced the 404
page with an error screen. Fall back to the raw path, and add mounted
tests for the suggestion and the malformed case.
