chore(v1.22.1): tidy labs subtitle scale and drop dead sleep keys

Standardise the labs marker subtitle to text-xs across both the compact list
and the card grid, and build the localized name->slug lookup map once per
locale instead of re-scanning the catalog seeds per group on every render.

Add relative to the mobile section strips in the settings and admin shells so
the active chip's offsetLeft is measured from the strip, giving an exact
horizontal scroll target.

Drop the orphaned insights.sleep.headlineCaption and headlineCaptionSuffix
keys from all six locales; nothing references them after the sleep headline
removal.

src/components/admin/admin-shell.tsx

@@ -251,7 +251,7 @@ export function AdminShell({ active, children }: AdminShellProps) {
       <nav
         ref={mobileStripRef}
         aria-label={t("admin.shell.sectionsNav")}
-        className="no-scrollbar -mx-4 mb-4 snap-x snap-mandatory overflow-x-auto px-4 md:hidden"
+        className="no-scrollbar relative -mx-4 mb-4 snap-x snap-mandatory overflow-x-auto px-4 md:hidden"
       >
         <ul className="flex min-w-max gap-2">
           <li className="snap-start">

src/components/labs/lab-list.tsx

@@ -11,7 +11,7 @@ import { Card, CardContent } from "@/components/ui/card";
 import { EmptyState } from "@/components/ui/empty-state";
 import { Skeleton } from "@/components/ui/skeleton";
 import { apiGet } from "@/lib/api/api-fetch";
-import { resolveCatalogSlug } from "@/lib/labs/biomarker-catalog";
+import { BIOMARKER_CATALOG } from "@/lib/labs/biomarker-catalog";
 import { formatDate } from "@/lib/format";
 import { formatReferenceRange } from "@/lib/labs/reference-range";
 import { formatLabReading, formatLabValue } from "@/lib/labs/format-value";
@@ -81,8 +81,20 @@ export function LabList({ onAddFirst }: { onAddFirst?: () => void } = {}) {
   // v1.22 — a short, factual line under each marker heading describing what the
   // biomarker measures, sourced from the catalog via i18n. Free-text markers
   // (no catalog match) carry no subtitle rather than a fabricated one.
+  // v1.22.1 — build the localized name→slug map once per locale instead of
+  // re-scanning all catalog seeds (calling `t()` each) per group every render.
+  const slugByName = useMemo(() => {
+    const map = new Map<string, string>();
+    for (const seed of BIOMARKER_CATALOG) {
+      const norm = t(`labs.catalog.${seed.slug}`).trim().toLowerCase();
+      if (norm) map.set(norm, seed.slug);
+    }
+    return map;
+  }, [t]);
   const describeMarker = (analyte: string): string | null => {
-    const slug = resolveCatalogSlug(analyte, (s) => t(`labs.catalog.${s}`));
+    const norm = analyte.trim().toLowerCase();
+    if (!norm) return null;
+    const slug = slugByName.get(norm);
     return slug ? t(`labs.catalog.desc.${slug}`) : null;
   };
 
@@ -287,7 +299,7 @@ export function LabList({ onAddFirst }: { onAddFirst?: () => void } = {}) {
               />
               <CardContent>
                 {description ? (
-                  <p className="text-muted-foreground mb-2 text-sm">
+                  <p className="text-muted-foreground mb-2 text-xs">
                     {description}
                   </p>
                 ) : null}

src/components/settings/settings-shell.tsx

@@ -450,7 +450,7 @@ export function SettingsShell({
       <nav
         ref={mobileStripRef}
         aria-label={t("settings.shell.sectionsNav")}
-        className="no-scrollbar -mx-4 mb-4 snap-x snap-mandatory overflow-x-auto px-4 md:hidden"
+        className="no-scrollbar relative -mx-4 mb-4 snap-x snap-mandatory overflow-x-auto px-4 md:hidden"
       >
         <ul className="flex min-w-max gap-2">
           {visibleSections.map((section) => {