Tradovate sync: connect live accounts

Tradovate sync is no longer limited to demo accounts. When you add a new connection under Import → Tradovate sync, pick Demo or Live before starting OAuth. The choice is stored with the account, and scheduled daily syncs use the correct Tradovate API for that environment.

The credentials table now shows each account's real environment—Live in amber, Demo in blue. Reconnecting an account keeps its original environment so you do not accidentally swap demo and live tokens.

The connection status badge is also more reliable: it reflects whether a token is present instead of comparing a stale expiry timestamp, so accounts no longer flip to "expired" just because the page has been open for a while.