The Expiry cell is now a dropdown of available expiries for that leg's
symbol (fetched from /api/expirations on page open / symbol switch /
Reload). Picking a different expiry pulls that expiry's chain on-demand
(cached), finds the same strike (or the closest available) for the leg's
type, and updates entry price, IV and mark. Lock clears since it's a new
contract.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ojy
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