TraumaColumnKind:
    | "category"
    | "level"
    | "severity"
    | "hr"
    | "area"
    | "notes"
    | "nextTest"

What a Trauma ledger cell renders (#939) — selects the row field and the cell markup: category / area / notes / nextTest are text, level (FL / PSL / PSY / ASL) is the numeric level modifier, severity is the banded injury level (with a healed icon), and hr is the healing rate (with an untreated marker).