DxFeed: clearer connection list with trading accounts

Saved DxFeed logins now appear as accordion cards instead of a flat table. Each card shows the prop firm, the login email, token status, last sync, and a Schedule or Edit link for the daily sync time.

Expand a connection to see every trading account it covers—useful when one login syncs several evaluation accounts at once. The actions menu (Sync, Reconnect, Remove) closes properly after you pick an option.

Removing a connection no longer sounds like deleting your journal: the confirm dialog explains that already imported trades stay in RICO TRADING. You can remove accounts or trades separately in Data Management if you want them gone.