Fetches current balance, gap days since maturity, the linked savings account's rate, and the resulting gap-interest amount and projected new balance, and displays them above the dashboard-renewal timing text -- so staff see exactly what a late renewal is about to credit before confirming anything. Read-only; failure to load the preview doesn't block the renewal itself, since the existing timing text already explains the action. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>