The desktop sidebar fetched the unified cross-profile session list as
profile='all' and filtered it client-side by the active profile. On a
large multi-profile install the active profile's rows could be windowed
out of the cross-profile recency page entirely, so switching to a profile
agent showed an empty history panel (and the 'all' fetch could exceed the
15s IPC timeout on startup). Scope the fetch to the active profile so its
own page comes back on its merits, and bump the session-list IPC timeout
to 60s. profileScope is now a refreshSessions dep, so the existing
gateway-open effect re-pulls on profile switch.
