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/ConfigPanel.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useRef, useState } from "react";
+import { useEffect, useId, useMemo, useRef, useState } from "react";
 import { qk } from "../lib/queryKeys";
 import { useTranslation } from "react-i18next";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
@@ -225,12 +225,13 @@ export default function ConfigPanel() {
                     variant="glass"
                     icon={<Send />}
                     loading={testEmail.isPending}
-                    disabled={dirty}
+                    aria-disabled={dirty}
                     onClick={() => testEmail.mutate()}
                   >
                     {t("config.testEmail")}
                   </Button>
                 </Tooltip>
+                {dirty && <p className="text-2xs text-muted">{t("config.testDirty")}</p>}
               </div>
             )}
 
@@ -241,13 +242,13 @@ export default function ConfigPanel() {
                     variant="glass"
                     icon={<Plug />}
                     loading={testIssues.isPending}
-                    disabled={dirty}
+                    aria-disabled={dirty}
                     onClick={() => testIssues.mutate()}
                   >
                     {t("config.issuesTest")}
                   </Button>
                 </Tooltip>
-                {dirty && <p className="text-2xs text-muted mt-2">{t("config.plexTestDirty")}</p>}
+                {dirty && <p className="text-2xs text-muted mt-2">{t("config.testDirty")}</p>}
               </div>
             )}
 
@@ -258,13 +259,13 @@ export default function ConfigPanel() {
                     variant="glass"
                     icon={<Plug />}
                     loading={testPlex.isPending}
-                    disabled={dirty}
+                    aria-disabled={dirty}
                     onClick={() => testPlex.mutate()}
                   >
                     {t("config.plexTest")}
                   </Button>
                 </Tooltip>
-                {dirty && <p className="text-2xs text-muted mt-2">{t("config.plexTestDirty")}</p>}
+                {dirty && <p className="text-2xs text-muted mt-2">{t("config.testDirty")}</p>}
                 {plexResult && (
                   <div className="mt-3">
                     <p className="text-xs text-muted mb-2">
@@ -369,22 +370,30 @@ function Field({
   // toggles a secret's reset-on-save (applied on Save, not immediately). A boolean toggle is
   // its own control — storing its value is equivalent to the default, so no reset link.
   const showReset = item.is_set && !isBool;
+  const switchId = useId();
+  const Text = isBool ? "label" : "div";
 
   return (
     // Stacked below `sm`: the control column cannot shrink, and beside a wide control it left the
     // label and hint a sliver of a phone's width.
     <div className="flex flex-col gap-2 py-3 sm:flex-row sm:items-start sm:justify-between sm:gap-3">
-      <div className="min-w-0 flex-1">
-        <div className="text-sm font-medium">{label}</div>
-        <p className="text-xs text-muted leading-relaxed mt-0.5">
+      {/* A switch's whole text column is its label, so the title or the hint toggles it (F12); a
+          label may only hold phrasing content, hence the block spans. */}
+      <Text
+        {...(isBool && { htmlFor: switchId })}
+        className={`min-w-0 flex-1 ${isBool ? "cursor-pointer select-none" : ""}`}
+      >
+        <span className="block text-sm font-medium">{label}</span>
+        <span className="block text-xs text-muted leading-relaxed mt-0.5">
           {t(`config.fields.${item.key}.hint`, "")}
-        </p>
-        <p className="text-2xs text-muted mt-1">{status}</p>
-      </div>
+        </span>
+        <span className="block text-2xs text-muted mt-1">{status}</span>
+      </Text>
 
       <div className="flex max-w-full flex-col items-start gap-1.5 sm:shrink-0 sm:items-end">
         {isBool ? (
           <Switch
+            id={switchId}
             label={label}
             checked={value === "true"}
             onChange={(v) => onChange(v ? "true" : "false")}