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/PriorityStepper.tsx

@@ -6,9 +6,15 @@ import { useReturnFocus } from "./useReturnFocus";
 
 type Size = "sm" | "md";
 
+// Every part is a target: 24 / 28 on a mouse (B1), 44 on a coarse pointer (A3).
+const COARSE_VALUE = "pointer-coarse:h-(--touch-target) pointer-coarse:w-(--touch-target)";
 const SIZED = {
-  sm: { btn: "w-6 h-6", icon: "w-3.5 h-3.5", value: "w-8 h-6 text-sm" },
-  md: { btn: "w-7 h-7", icon: "w-4 h-4", value: "w-10 h-7 text-sm" },
+  sm: {
+    btn: "w-6 h-6 touch-target",
+    icon: "w-3.5 h-3.5",
+    value: `w-8 h-6 text-sm ${COARSE_VALUE}`,
+  },
+  md: { btn: "w-7 h-7 touch-target", icon: "w-4 h-4", value: `w-10 h-7 text-sm ${COARSE_VALUE}` },
 } as const;
 
 function PriorityStepButton({
@@ -160,7 +166,7 @@ export function PriorityStepper({
             onClick={beginEdit}
             aria-label={t("common.priority.edit")}
             title={t("common.priority.edit")}
-            className={`w-full text-center font-medium tabular-nums hover:text-accent ${editing ? "invisible" : ""}`}
+            className={`h-full w-full text-center font-medium tabular-nums hover:text-accent ${editing ? "invisible" : ""}`}
           >
             {priority}
           </button>