fix(a11y): distinguish errors from empty states and close naming gaps

Add isError branches with a retry affordance to the mood, illness, and
vorsorge lists so a failed read no longer renders as "no entries yet"
and invites duplicate re-entry, matching the labs and cycle pattern.

Make the admin backups table reachable on a phone with a card fallback,
name the admin language and timezone selects and the AI raw-data switch
for screen readers, and replace the touch-unreachable title= help on the
glucose clinical panels with a tap-capable info popover.

Route the password-strength label through the AA-tuned semantic tokens,
underline the register login link so it is not distinguished by colour
alone, give the labs load error alert semantics, and explain why the
target editor Save button is disabled with aria-invalid and a live
alert.

src/components/illness/illness-view.tsx

@@ -17,7 +17,13 @@
  */
 import { useId, useMemo, useState } from "react";
 import Link from "next/link";
-import { ChevronDown, Plus, Stethoscope, Wrench } from "lucide-react";
+import {
+  ChevronDown,
+  Plus,
+  RefreshCw,
+  Stethoscope,
+  Wrench,
+} from "lucide-react";
 
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -308,7 +314,12 @@ function EpisodeGroup({
 
 export function IllnessView() {
   const { t } = useTranslations();
-  const { data: episodes, isLoading } = useIllnessEpisodes(true);
+  const {
+    data: episodes,
+    isLoading,
+    isError,
+    refetch,
+  } = useIllnessEpisodes(true);
   const resolve = useResolveEpisode();
   const { prefs } = useModuleListPrefs("illness");
 
@@ -418,6 +429,24 @@ export function IllnessView() {
           <Skeleton className="h-32 w-full" />
           <Skeleton className="h-32 w-full" />
         </div>
+      ) : isError ? (
+        <div
+          role="alert"
+          data-slot="illness-list-error"
+          className="text-muted-foreground flex flex-col items-start gap-3 py-8 text-sm sm:flex-row sm:items-center sm:justify-between"
+        >
+          <span>{t("illness.listLoadError")}</span>
+          <Button
+            type="button"
+            size="sm"
+            variant="outline"
+            onClick={() => void refetch()}
+            className="gap-1.5"
+          >
+            <RefreshCw className="h-3.5 w-3.5" aria-hidden="true" />
+            <span>{t("common.retry")}</span>
+          </Button>
+        </div>
       ) : hasEpisodes ? (
         <>
           {/* Retrospective summary sits above the list so a long history