Sweep every feet + inches pair the fields can offer and every whole-inch
height across the canonical range, asserting the value comes back
unchanged and lands inside the server's window. Assert the metric branch
with toBe so a re-derivation of a stored height cannot slip through.
Render both entry surfaces under each preference: the metric case keeps
the single centimetres box with the canonical guardrails, the imperial
case shows the feet + inches pair seeded from the stored value. Extend
the structural guard so a surface that drops the adapter, hardcodes a
centimetre guardrail, or hardcodes a unit label trips a tripwire.
Height is a profile column, not a MeasurementType, so the display
transform that carries the metric/imperial preference across every
reading surface never reached it. Add the adapter that closes the gap.
With imperial selected both entry surfaces render a feet + inches pair
instead of a centimetres box; with metric selected the field is what it
was. The adapter converts to canonical centimetres at the entry
boundary, so storage, the wire, the Zod bound, and every consumer of
the value stay unchanged.
Imperial entry quantises to whole inches, which map to centimetres
without a remainder, so save-then-reopen returns the typed pair. The
offered feet window rounds inward against the canonical 50-300 window
so a height the fields allow is never refused on save.
The unit select shares the Settings card with the height field, so a
flip re-expresses the in-flight draft through the new branch rather
than stranding an empty field.
Marc-André Bombeck