fix(insights): add scores drill-down back-link and unify back-link styling

The composite-score detail page (/insights/scores/[metric]) gains a leading
back-link to the Insights overview, matching the other drill-down surfaces.
Align the medication detail + history back-links onto the canonical ghost
recipe (-ml-2 w-fit, mr-1 size-4 icon) used by the values and workout-detail
pages, replacing the divergent -ml-2 gap-1 variant.

messages/de.json

@@ -2047,7 +2047,9 @@
         "weekday": "Die meisten deiner {metric}-Werte fallen auf einen Wochentag. Messungen an anderen Tagen ergeben ein vollständigeres Bild.",
         "timeOfDay": "Die meisten deiner {metric}-Werte fallen auf eine ähnliche Tageszeit. Unterschiedliche Zeiten ergeben ein vollständigeres Bild."
       },
-      "valuesBack": "Zurück zu Insights"
+      "valuesBack": "Zurück zu Insights",
+      "valuesBackToMetric": "Zurück zu {metric}",
+      "scoresBack": "Zurück zu Insights"
     },
     "sleep": {
       "title": "Schlaf",

messages/en.json

@@ -2047,7 +2047,9 @@
         "weekday": "Most of your {metric} readings land on one weekday. Logging on other days gives a fuller picture.",
         "timeOfDay": "Most of your {metric} readings land at a similar time of day. Varying the time gives a fuller picture."
       },
-      "valuesBack": "Back to insights"
+      "valuesBack": "Back to insights",
+      "valuesBackToMetric": "Back to {metric}",
+      "scoresBack": "Back to insights"
     },
     "sleep": {
       "title": "Sleep",

messages/es.json

@@ -2047,7 +2047,9 @@
         "weekday": "La mayoría de tus mediciones de {metric} caen en un mismo día de la semana. Registrar en otros días ofrece una imagen más completa.",
         "timeOfDay": "La mayoría de tus mediciones de {metric} caen a una hora similar del día. Variar la hora ofrece una imagen más completa."
       },
-      "valuesBack": "Volver a Insights"
+      "valuesBack": "Volver a Insights",
+      "valuesBackToMetric": "Volver a {metric}",
+      "scoresBack": "Volver a Insights"
     },
     "sleep": {
       "title": "Sueño",

messages/fr.json

@@ -2047,7 +2047,9 @@
         "weekday": "La plupart de vos mesures de {metric} tombent le même jour de la semaine. Enregistrer d'autres jours donne une image plus complète.",
         "timeOfDay": "La plupart de vos mesures de {metric} tombent à une heure similaire de la journée. Varier l'heure donne une image plus complète."
       },
-      "valuesBack": "Retour aux Insights"
+      "valuesBack": "Retour aux Insights",
+      "valuesBackToMetric": "Retour à {metric}",
+      "scoresBack": "Retour aux Insights"
     },
     "sleep": {
       "title": "Sommeil",

messages/it.json

@@ -2047,7 +2047,9 @@
         "weekday": "La maggior parte delle tue misurazioni di {metric} cade in un solo giorno della settimana. Registrare in altri giorni offre un quadro più completo.",
         "timeOfDay": "La maggior parte delle tue misurazioni di {metric} cade in un orario simile della giornata. Variare l'orario offre un quadro più completo."
       },
-      "valuesBack": "Torna a Insights"
+      "valuesBack": "Torna a Insights",
+      "valuesBackToMetric": "Torna a {metric}",
+      "scoresBack": "Torna a Insights"
     },
     "sleep": {
       "title": "Sonno",

messages/pl.json

@@ -2047,7 +2047,9 @@
         "weekday": "Większość Twoich pomiarów {metric} przypada na jeden dzień tygodnia. Pomiary w inne dni dają pełniejszy obraz.",
         "timeOfDay": "Większość Twoich pomiarów {metric} przypada o podobnej porze dnia. Różne pory dają pełniejszy obraz."
       },
-      "valuesBack": "Powrót do Insights"
+      "valuesBack": "Powrót do Insights",
+      "valuesBackToMetric": "Powrót do {metric}",
+      "scoresBack": "Powrót do Insights"
     },
     "sleep": {
       "title": "Sen",

src/app/insights/scores/[metric]/page.tsx

@@ -1,8 +1,11 @@
 "use client";
 
+import Link from "next/link";
 import { useParams } from "next/navigation";
+import { ArrowLeft } from "lucide-react";
 
 import { useTranslations } from "@/lib/i18n/context";
+import { Button } from "@/components/ui/button";
 import { SubPageShell } from "@/components/insights/sub-page-shell";
 import {
   CompositeScoreAnatomy,
@@ -68,6 +71,20 @@ export default function CompositeScorePage() {
     <SubPageShell
       title={t(header.title)}
       description={t(header.description)}
+      backLink={
+        <Button
+          asChild
+          variant="ghost"
+          size="sm"
+          data-slot="composite-score-back"
+          className="-ml-2 w-fit"
+        >
+          <Link href="/insights">
+            <ArrowLeft className="mr-1 size-4" aria-hidden="true" />
+            {t("insights.subPage.scoresBack")}
+          </Link>
+        </Button>
+      }
       coachLaunch
     >
       <CompositeScoreAnatomy metric={metric} />

src/app/medications/[id]/history/page.tsx

@@ -84,14 +84,9 @@ export default function IntakeHistoryPage({
     <div className="space-y-6">
       {/* Back to the medication detail page — history is a drill-down
           OF the medication, not a sibling of the list. */}
-      <Button
-        variant="ghost"
-        size="sm"
-        className="text-muted-foreground -ml-2 gap-1"
-        asChild
-      >
+      <Button variant="ghost" size="sm" className="-ml-2 w-fit" asChild>
         <Link href={`/medications/${id}`}>
-          <ArrowLeft aria-hidden="true" className="h-4 w-4" />
+          <ArrowLeft aria-hidden="true" className="mr-1 size-4" />
           {t("medications.detail.history.back")}
         </Link>
       </Button>

src/app/medications/[id]/page.tsx

@@ -165,14 +165,9 @@ export default function MedicationDetailPage({
   if (isError || !medication) {
     return (
       <div className="space-y-6">
-        <Button
-          variant="ghost"
-          size="sm"
-          className="text-muted-foreground -ml-2 gap-1"
-          asChild
-        >
+        <Button variant="ghost" size="sm" className="-ml-2 w-fit" asChild>
           <Link href="/medications">
-            <ArrowLeft className="h-4 w-4" />
+            <ArrowLeft className="mr-1 size-4" aria-hidden="true" />
             {t("medications.back")}
           </Link>
         </Button>
@@ -198,14 +193,9 @@ export default function MedicationDetailPage({
 
   return (
     <div className="space-y-6" data-slot="medication-detail-page">
-      <Button
-        variant="ghost"
-        size="sm"
-        className="text-muted-foreground -ml-2 gap-1"
-        asChild
-      >
+      <Button variant="ghost" size="sm" className="-ml-2 w-fit" asChild>
         <Link href="/medications">
-          <ArrowLeft aria-hidden="true" className="h-4 w-4" />
+          <ArrowLeft aria-hidden="true" className="mr-1 size-4" />
           {t("medications.back")}
         </Link>
       </Button>