The free wall framing take-off could already pack baseboard and door and window casing into stock boards. Two options lived only in the command line: shoe moulding, and a scarf overlap for runs longer than a board. Both are now fields on the page under Interior trim.
Shoe moulding follows the baseboard runs in its own stock length and price. A scarf overlap of, say, 1.5 in makes every splice use that much extra board instead of assuming a butt joint. Everything runs in your browser and lengths and prices are the figures you type.
It is checked by a test of the page's wiring and by the engine's hand-arithmetic tests, not against a real trim order yet.