The Expiry column header now has a master expiry selector with a 🔓/🔒
toggle. Locking it snaps every leg to the most common expiry, then any
change to the master propagates to all legs (each re-priced from its new
expiry's chain). Per-leg expiry selects are disabled while locked.
Lock resets when switching symbols or clearing.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ojy
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