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/tableHeader.tsx

@@ -115,7 +115,7 @@ function FilterFunnel<T>({
               onSelect={() => onApply(col.key, "")}
               label={t("datatable.all")}
               className={`text-left text-xs px-2 py-1.5 rounded-lg outline-hidden transition ${
-                !filterOn ? "bg-accent text-accent-fg" : "text-muted hover:bg-card"
+                !filterOn ? "bg-accent text-accent-fg" : "text-muted state-layer"
               }`}
             >
               {t("datatable.all")}
@@ -129,7 +129,7 @@ function FilterFunnel<T>({
                 onSelect={() => onApply(col.key, o.value)}
                 label={o.label}
                 className={`text-left text-xs px-2 py-1.5 rounded-lg outline-hidden transition ${
-                  value === o.value ? "bg-accent text-accent-fg" : "text-muted hover:bg-card"
+                  value === o.value ? "bg-accent text-accent-fg" : "text-muted state-layer"
                 }`}
               >
                 {o.label}
@@ -237,7 +237,7 @@ export function ColumnHead<T>({
                 {col.sortable ? (
                   <Pressable
                     onClick={() => onToggleSort(col.key)}
-                    className="inline-flex items-center gap-1 hover:text-fg cursor-pointer"
+                    className="inline-flex min-h-6 items-center gap-1 hover:text-fg cursor-pointer touch-target"
                   >
                     {col.header}
                     {isSorted &&