Mirror the main branch's profile list: a Profiles submenu populated
from the daemon's ListProfiles RPC, with the active profile shown as
a checked entry and a click on any other entry switching to it via
SwitchProfile.
The initial fill is deferred to the Common.ApplicationStarted hook
because Menu.Update() short-circuits while app.running is false and
the Wails3 macOS impl would nil-deref on early-startup InvokeSync.
100d25a062