* fix(desktop): send linked server proxy headers on WebSocket upgrades
isLinkedOrigin compared the request origin with the link's http(s)
origin, so the terminal WebSocket (wss://host/...) never matched and its
upgrade went out without the proxy headers and basic auth. Behind a
forward-auth proxy that upgrade was redirected to the login and the
terminal closed with "connection closed unexpectedly". ws and wss now
count as http and https for the comparison, the same mapping the
WebSocket handshake itself uses, with host and port still matched
exactly.
* fix(desktop): allow a linked server's self-signed certificate for its WebSockets
isInvalidCertificateAllowedForUrl compared the URL with a local
getOrigin copy, so wss://host never matched the link's https://host
origin and an allowed self-signed certificate did not cover the
terminal and tunnel sockets. It now uses linkedServer.isLinkedOrigin,
which maps ws and wss the same way as the proxy headers, and the local
copy is removed.
A ?view= link opened without a session spun forever: the gate rendered
the bare view when the session check failed, so the plugin runtime never
started and the view never registered. A regular browser now keeps the
link in sessionStorage, shows the normal login and opens the link again
after any login, including redirect logins. Only same-origin paths with
a view are restored. The desktop app, embedded sign-in frames and guest
views keep their current behavior.