How per-set SKU quantities are rounded in schedules

Understand why per-set hardware quantities round up once at the design level while per-cabinet listings show consumed base quantities.

1. For hardware sold in sets (e.g., one set covers 1000 mm of length or a fixed area), the raw-material schedule converts the design's total consumed length/area into a number of sets and rounds UP, once, at the whole-design level.

   QC mode now also displays set-based hardware in sets: it takes the aggregated quantity, divides by the set size and rounds up once per aggregated row, so QC counts match the Raw Materials view.

2. Per-cabinet listings (QC Mode hardware, the unit Hardware tab) show the consumed base quantity (total millimetres/area, or piece counts) for items sold by measure, without set rounding, so that per-cabinet numbers add up consistently across the design. For items sold in sets, the quantity is converted to sets and rounded up to whole sets, matching how Raw Materials counts them.

3. Because rounding happens only on the design total, per-cabinet figures cannot be individually converted to sets and summed: two cabinets each consuming 300 mm of a 1000 mm-per-set item correctly need 1 set for the design, not 2.