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/PlexSearchBox.tsx

@@ -119,7 +119,7 @@ export default function PlexSearchBox() {
       leading={
         <ActionMenu
           ariaLabel={t("plex.searchField.aria")}
-          className="min-w-0 shrink inline-flex items-center gap-1 rounded-full px-2 h-7 text-xs font-medium text-muted transition hover:text-fg hover:bg-border/50"
+          className="min-w-0 shrink inline-flex items-center gap-1 rounded-full px-2 h-7 text-xs font-medium text-muted transition state-layer hover:text-fg touch-target"
           trigger={
             <>
               <span className="min-w-0 max-w-28 truncate">{pillLabel}</span>
@@ -155,8 +155,10 @@ export default function PlexSearchBox() {
                 onMouseDown={(e) => e.preventDefault()} // keep input focus through the click
                 onMouseEnter={() => setHi(i)}
                 onClick={() => pick(i)}
+                // The pointer moves `hi` too, so the highlight IS the hover: the menus' roving
+                // recipe (AnchoredPopover's HIGHLIGHT_UNSELECTED), one look for the mouse and the keys.
                 className={`flex w-full items-center gap-3 rounded-lg p-1.5 transition ${
-                  hi === i ? "bg-border/60" : "hover:bg-border/40"
+                  hi === i ? "bg-accent/35 text-fg ring-1 ring-inset ring-accent/60" : ""
                 }`}
               >
                 <img