diff --git a/messages/de.json b/messages/de.json
index 3ee22f0ba..523158b31 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -2617,8 +2617,6 @@
       "title": "Schlaf",
       "description": "Phasen-Aufschlüsselung und nächtliche Dauer – gezogen aus Apple Health.",
       "headlineTitle": "Durchschnitt pro Nacht",
-      "headlineCaption": "Gemittelt über {count} Nächte – {suffix}",
-      "headlineCaptionSuffix": "pro Nacht",
       "compositionTitle": "Phasen-Verteilung",
       "compositionSubtitle": "Letzte {nights} Nächte",
       "compositionAriaLabel": "Schlafphasen-Verteilung über {nights} Nächte",
diff --git a/messages/en.json b/messages/en.json
index d85e9af33..16ec52b02 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -2617,8 +2617,6 @@
       "title": "Sleep",
       "description": "Stage breakdown and nightly duration, drawn from Apple Health.",
       "headlineTitle": "Average per night",
-      "headlineCaption": "Averaged across {count} nights — {suffix}",
-      "headlineCaptionSuffix": "per night",
       "compositionTitle": "Stage composition",
       "compositionSubtitle": "Last {nights} nights",
       "compositionAriaLabel": "Sleep stage composition over {nights} nights",
diff --git a/messages/es.json b/messages/es.json
index 9cade6be4..8bea74277 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -2617,8 +2617,6 @@
       "title": "Sueño",
       "description": "Desglose por fases y duración nocturna, tomados de Apple Health.",
       "headlineTitle": "Media por noche",
-      "headlineCaption": "Promediado sobre {count} noches — {suffix}",
-      "headlineCaptionSuffix": "por noche",
       "compositionTitle": "Distribución de fases",
       "compositionSubtitle": "Últimas {nights} noches",
       "compositionAriaLabel": "Distribución de fases del sueño en {nights} noches",
diff --git a/messages/fr.json b/messages/fr.json
index 44d4e9162..d943773ff 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -2617,8 +2617,6 @@
       "title": "Sommeil",
       "description": "Répartition des phases et durée nocturne, issues d’Apple Health.",
       "headlineTitle": "Moyenne par nuit",
-      "headlineCaption": "Moyenne sur {count} nuits — {suffix}",
-      "headlineCaptionSuffix": "par nuit",
       "compositionTitle": "Répartition des phases",
       "compositionSubtitle": "{nights} dernières nuits",
       "compositionAriaLabel": "Répartition des phases de sommeil sur {nights} nuits",
diff --git a/messages/it.json b/messages/it.json
index 31f4e6bee..38c204fbb 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -2617,8 +2617,6 @@
       "title": "Sonno",
       "description": "Suddivisione per fasi e durata notturna, da Apple Health.",
       "headlineTitle": "Media per notte",
-      "headlineCaption": "Mediato su {count} notti — {suffix}",
-      "headlineCaptionSuffix": "per notte",
       "compositionTitle": "Distribuzione delle fasi",
       "compositionSubtitle": "Ultime {nights} notti",
       "compositionAriaLabel": "Distribuzione delle fasi del sonno su {nights} notti",
diff --git a/messages/pl.json b/messages/pl.json
index ba21658ab..566625aa1 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -2617,8 +2617,6 @@
       "title": "Sen",
       "description": "Podział na fazy i nocna długość snu, dane z Apple Health.",
       "headlineTitle": "Średnia na noc",
-      "headlineCaption": "Uśrednione z {count} nocy — {suffix}",
-      "headlineCaptionSuffix": "na noc",
       "compositionTitle": "Rozkład faz",
       "compositionSubtitle": "Ostatnie {nights} nocy",
       "compositionAriaLabel": "Rozkład faz snu w {nights} nocach",
diff --git a/src/components/admin/admin-shell.tsx b/src/components/admin/admin-shell.tsx
index 1a5ce6196..46e52c8d6 100644
--- a/src/components/admin/admin-shell.tsx
+++ b/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">
diff --git a/src/components/labs/lab-list.tsx b/src/components/labs/lab-list.tsx
index 1fa521671..1f45b1518 100644
--- a/src/components/labs/lab-list.tsx
+++ b/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}
diff --git a/src/components/settings/settings-shell.tsx b/src/components/settings/settings-shell.tsx
index 25d068625..413b1cb20 100644
--- a/src/components/settings/settings-shell.tsx
+++ b/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) => {