Function ConnectButton

One button that follows the wallet session: a connect trigger with no session, the account popover with one, read from useParty rather than a prop so nothing can contradict a connect already in flight. A <CantonConnectProvider> above it is required, alone among the components here. mode pins it to one face, which renders nothing rather than the other one; children replace the whole label, the pending copy included, so word that off useConnect().isConnecting. Imported from /connect, the sub-path that pulls the Canton SDK into a consumer's graph.