build(eslint): drop the Z_RAW and EDGED_LABEL selectors

Both came out of the E28 claim audit (0521149c named z-levels, e13d93a3
static labels as flat Badges) after the audit itself had fixed the sites.
No real hit since: 0 matches in every lint run from E28 to E34 (S2/S3
measurement). Each still cost a probe test (zLayer.contract, the edged-label
half of hoverAndLink.contract) and a place in the gate snapshot. The design
rules stay in DESIGN.md (Tokens: no ad-hoc z-index; Static vs pressable),
with a decision-log row saying the selectors went and why.

frontend/src/design-lab/batchA.tsx

@@ -67,7 +67,6 @@ function TouchRow() {
   return (
     <div className="flex flex-col gap-2">
       <div className="flex flex-wrap items-center gap-2">
-        {/* eslint-disable-next-line no-restricted-syntax -- a drawing of the segmented control, not a label */}
         <span className="inline-flex rounded-full border border-border bg-card p-0.5 text-xs">
           <span className={clsx(pill, "rounded-full bg-accent text-accent-fg")}>Mine</span>
           <span className={clsx(pill, "rounded-full text-muted")}>Library</span>