Two bugs the user hit while browsing the dev docs:
1. ariadne.x/dev/ used root-style hrefs ("thread", "dev", "assets/…") that
assumed the <base> tag workaround was active. On a client that walks
relative URLs against the page URL (BCNR direct hosts, Theseus in
gateway mode), every click appended one more segment — "/dev/plug-ins",
"/dev/plug-ins/extensions", etc. — because "plug-ins" resolved against
"/dev/" instead of the site root. Switched the dev page to proper "../"
relative paths (../thread/, ../assets/favicon.svg, ../#download) so it
resolves correctly regardless of host or base-tag presence. Same fix
on ariadne.x/thread/ (brand href="" went nowhere; the Product column
pointed every link at the current directory).
2. Theseus sub-pages had drifted apart. The home topnav was already
trimmed to Plug-ins · Extensions · Developers · Sirius.X · Get Theseus,
but plug-ins/, extensions/, brand/, and whitepaper/ still carried the
old "Brand" link in their topnav, had no "Developers" entry at all,
and lacked the mobile hamburger. Standardised all four to the home
pattern and dropped Brand + Whitepaper from the topnav on each page.
Both pages still exist and are reachable from the footer; neither is
on the top-level nav path.
Also added a Developers link + hamburger to ariadne.x/thread/ so the
Ariadne family matches the Theseus family on every page.