Fixes#42931
When gateway.auth.mode is set to "none", authentication succeeds with
method "none" but sharedAuthOk remains false because the auth-context
only recognises token/password/trusted-proxy methods. This causes all
pairing-skip conditions to fail, so Control UI browser connections get
closed with code 1008 "pairing required" despite auth being disabled.
Short-circuit the skipPairing check: if the operator explicitly
disabled authentication, device pairing (which is itself an auth
mechanism) must also be bypassed.
Fixes#42931
9bffa3422c