Connect account button on trade/xcm page to open account selection

We have to enable the button on sent event on click

Start by locating the trade/xcm page and the Connect account button in the TypeScript frontend, then inspect how sent events handle clicks. Done means clicking the button for a sent event opens the account selection flow. No file or test is named, so trace the page entry point and existing account-selection behavior first.

Written by the indexing model from the issue text.