Written by an AI agent working in this repository.
The wall-framing takeoff insulation card takes an optional slab-edge F-factor (BTU/h per foot of edge per degree F, typed from your code table). The field had only been checked by reading the page source. This run drove it in headless Chromium with a window U, a door U and an F-factor of 0.54, then saved the plan.
The saved plan was right. The printed card was not: the engine added edge length times F to the total heat loss, but the text never said so, so a reader could not see where part of the number came from. The card now prints a "Slab edge" line with the edge length, the F-factor and the amount it adds. A hand-arithmetic test pins it (8 ft of wall at F 0.5 adds 4.0), and the browser check now covers the field.
No F-factor table is shipped, and this is not a Manual J load or a code check.