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/eslint.config.js

@@ -443,12 +443,6 @@ const BOX_PX_MESSAGE =
 const GRID_MIN_PX = "/minmax\\([\\d.]+px,/";
 const GRID_MIN_PX_MESSAGE =
   "px-frozen box size doesn't scale with --font-scale: give a grid column's minimum in rem (minmax(9.375rem,1fr)), not minmax(Npx,…).";
-// A stacking order outside the layer scale (DESIGN.md Tokens: `base < menu < chrome < … < tooltip` in
-// index.css). A numeric `z-10` equals a level today but doesn't follow it when the scale moves; name it.
-const Z_RAW = "/(^|[\\s:])-?z-([1-9]\\d*|\\[[^\\]]+\\])(?![\\w-])/";
-const Z_RAW_MESSAGE =
-  "z-index off the layer scale: use a named level (z-under, z-base, z-menu, z-chrome, z-panel, z-rail, z-overlay, z-popover, z-tooltip), not z-N or z-[…].";
-
 // A hover that swaps a colour instead of laying the B3 state layer (DESIGN.md Tokens): `bg-card`,
 // `bg-border` and `bg-surface` vanish on a light card, an opacity dim reads as "disabled", and
 // `bg-(--hover)` restates the `state-layer` utility by hand. `group-hover:` (a reveal on a parent's
@@ -466,14 +460,6 @@ const PALETTE =
 const PALETTE_MESSAGE =
   "a palette colour: use a semantic token (text-rating, bg-live, bg-media-chrome, text-danger, …; DESIGN.md Tokens), not text-amber-500.";
 
-// A static label with an edge (DESIGN.md "Static vs pressable", audit F29): a <span> drawn round with a
-// border reads as a chip, is clicked and does nothing. A label that does nothing is ui/Badge (flat).
-// A small `rounded` box (a check mark drawn inside a menu row) is a glyph, not a label: only the label
-// radii match.
-const EDGED_LABEL = "/^(?=.*(^|\\s)rounded-(full|md|lg|xl|2xl)(\\s|$))(?=.*(^|\\s)border(\\s|$))/";
-const EDGED_LABEL_MESSAGE =
-  "a static label with an edge reads as a pressable chip: use ui/Badge (flat, tonal) for a label that does nothing.";
-
 // A class name split by an interpolation: the text right after `${…}` starts with a variant (`hover:`),
 // or the interpolation IS the variant and the text goes on with its class (`${NARROW}:w-24`, E28 S3f3).
 // A clock (`${m}:00`) and a URL (`${u}://`) are not classes.
@@ -665,20 +651,10 @@ export default tseslint.config(
         { selector: `TemplateElement[value.raw=${BOX_PX}]`, message: BOX_PX_MESSAGE },
         { selector: `Literal[value=${GRID_MIN_PX}]`, message: GRID_MIN_PX_MESSAGE },
         { selector: `TemplateElement[value.raw=${GRID_MIN_PX}]`, message: GRID_MIN_PX_MESSAGE },
-        { selector: `Literal[value=${Z_RAW}]`, message: Z_RAW_MESSAGE },
-        { selector: `TemplateElement[value.raw=${Z_RAW}]`, message: Z_RAW_MESSAGE },
         { selector: `Literal[value=${HOVER_SWAP}]`, message: HOVER_SWAP_MESSAGE },
         { selector: `TemplateElement[value.raw=${HOVER_SWAP}]`, message: HOVER_SWAP_MESSAGE },
         { selector: `Literal[value=${PALETTE}]`, message: PALETTE_MESSAGE },
         { selector: `TemplateElement[value.raw=${PALETTE}]`, message: PALETTE_MESSAGE },
-        {
-          selector: `JSXOpeningElement[name.name='span'] JSXAttribute[name.name='className'] Literal[value=${EDGED_LABEL}]`,
-          message: EDGED_LABEL_MESSAGE,
-        },
-        {
-          selector: `JSXOpeningElement[name.name='span'] JSXAttribute[name.name='className'] TemplateElement[value.raw=${EDGED_LABEL}]`,
-          message: EDGED_LABEL_MESSAGE,
-        },
       ],
     },
   },