fix(design): claim audit part 1b — whole-row switches, the field-family edge, state-layer hovers, icon links, reason-disabled controls, 24/44 targets (E28)

- F12 (owner: A): SwitchRow, the whole settings row toggles; a Config boolean toggles from its title
  and hint (a label pointed at the switch).
- F14 (owner: B): the form dropdown trigger wears the field frame (see-through, the >= 3:1 edge);
  labelled pills keep the faint edge and the accent-edge hover. DESIGN says so, with log rows.
- F6: ~15 bg-card / bg-border / opacity hovers onto the B3 state layer; a lint rule (HOVER_SWAP)
  refuses the swap, contract-tested.
- F10: bare 14px icon links onto IconLink / LinkButton; a local lint rule refuses a glyph-only <a>.
- F13: reason-disabled controls are aria-disabled (Users, Channels backfill, Discovery, Scheduler
  runs, Config tests); FocusSafeButton now swallows the click of a caller's aria-disabled; the
  Config tests say why while dirty (testDirty, HU/EN).
- F5/F11: every control measured live at 24 (mouse) and 44 (coarse) across every page; touch-target
  is a utility that wins over a caller's min-h-6; link variants carry it too; SegmentedToggle,
  Tabs, NavRail, menu rows, PriorityStepper, sliders, CheckRow, InnerInput, card links and the rest.
- F9: DismissibleChip's label reaches the chip's 24; the Combobox chips are DismissibleChips.
- F15: the "+N" / "More..." open state worded as it renders.

frontend/src/components/ui/Chip.tsx

@@ -52,14 +52,12 @@ export const Chip = forwardRef<HTMLButtonElement, ChipProps>(function Chip(
       aria-pressed={pressed}
       aria-label={removeLabel}
       title={removeLabel}
-      className={clsx(chipClass(variant, size), removeLabel && "group pr-1.5", className)}
+      className={clsx(chipClass(variant, size), removeLabel && "pr-1.5", className)}
       {...rest}
     >
       {icon}
       {children}
-      {removeLabel && (
-        <X className="size-3 opacity-60 group-hover:opacity-100" aria-hidden="true" />
-      )}
+      {removeLabel && <X className="size-3" aria-hidden="true" />}
     </FocusSafeButton>
   );
 });
@@ -104,7 +102,9 @@ export function DismissibleChip({
           onClick={onClick}
           aria-label={bodyLabel}
           title={bodyTitle}
-          className="inline-flex min-w-0 items-center gap-1 self-stretch [&>svg]:size-3 [&>svg]:shrink-0"
+          // -my-px + stretch: the body reaches over the chip's 1px edges to the chip's full 24 (44 on
+          // touch), as the × does; stretched inside the edges it was 22, under the B1 floor.
+          className="-my-px inline-flex min-w-0 items-center gap-1 self-stretch [&>svg]:size-3 [&>svg]:shrink-0"
         >
           {body}
         </FocusSafeButton>
@@ -116,7 +116,7 @@ export function DismissibleChip({
         onClick={onDismiss}
         aria-label={dismissLabel}
         title={dismissLabel}
-        className="-my-px grid size-6 shrink-0 place-items-center rounded-full opacity-60 transition hover:opacity-100 hover:bg-accent/20 touch-target"
+        className="-my-px grid size-6 shrink-0 place-items-center rounded-full transition state-layer touch-target"
       >
         <X className="size-3" aria-hidden="true" />
       </FocusSafeButton>