This fixes desktop app auth failures where users encounter
"Session expired" errors when creating environments or
saving requests despite being logged in.
The issue occurred because token verify/validation works on web
(cookie-based auth) but fails on desktop (bearer token auth). The
desktop implementation had flaky response parsing in
`verifyAuthTokens()`.
Includes some future proofing work around cookie parsing
in `setAuthCookies()`, for Set-Cookie headers contain commas
or are concatenated with newlines (see #5394).
eee92bbeeb