refactor(mental-wellbeing): shorten the intro and drop the mood-history link

The intro listed all four instruments with their subject in brackets and
then explained itself, which ran to two lines on a desktop header and five
or six on a phone — a paragraph to read before reaching the four cards that
say the same thing. It keeps its opening claim and the one caveat that
matters, and loses the enumeration the cards below already carry: one line
on desktop in all six languages, measured at 1280 and 1440.

The pointer to mood history at the foot of the page is gone. The link on
the mood page pointing here stays, because that direction earns its keep:
someone logging a mood may not know the screeners exist, while someone who
came here for a screener knows where their diary is.

messages/de.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Seelisches Wohlbefinden",
-    "pageDescription": "Vier validierte, freiwillige Selbsttests — PHQ-9 (Stimmung), GAD-7 (Sorgen), WHO-5 (Wohlbefinden) und SCI (Schlaf) — ergänzend zu deinem Stimmungstagebuch. Aussagekräftig ist der Verlauf über die Zeit, nicht ein einzelner Wert.",
-    "moodLink": "Deinen Stimmungsverlauf ansehen",
+    "pageDescription": "Vier validierte, freiwillige Selbsttests — aussagekräftig ist der Verlauf, nicht ein einzelner Wert.",
     "attributionLabel": "Quelle",
     "attributionShow": "Quelle und Lizenz für {instrument}",
     "choosePrompt": "Check-in auswählen",

messages/en.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Mental wellbeing",
-    "pageDescription": "Validated, opt-in self-checks — PHQ-9 (mood), GAD-7 (worry), WHO-5 (well-being) and SCI (sleep) — that sit beside your mood tracking. The value is the trend over time, not any single number.",
-    "moodLink": "View your mood history",
+    "pageDescription": "Four validated, voluntary self-checks — the trend over time says more than any single score.",
     "attributionLabel": "Attribution",
     "attributionShow": "Source and licence for {instrument}",
     "choosePrompt": "Choose a check-in",

messages/es.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Bienestar mental",
-    "pageDescription": "Cuatro autoevaluaciones validadas y opcionales — PHQ-9 (estado de ánimo), GAD-7 (preocupación), WHO-5 (bienestar) y SCI (sueño) — junto a tu registro de ánimo. Lo valioso es la tendencia en el tiempo, no un único número.",
-    "moodLink": "Ver tu historial de estado de ánimo",
+    "pageDescription": "Cuatro autoevaluaciones validadas y voluntarias: cuenta la evolución, no un valor aislado.",
     "attributionLabel": "Fuente",
     "attributionShow": "Fuente y licencia de {instrument}",
     "choosePrompt": "Elige una revisión",

messages/fr.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Bien-être mental",
-    "pageDescription": "Quatre auto-évaluations validées et facultatives — PHQ-9 (humeur), GAD-7 (inquiétude), WHO-5 (bien-être) et SCI (sommeil) — en complément de ton suivi de l'humeur. Ce qui compte, c'est la tendance dans le temps, pas un chiffre isolé.",
-    "moodLink": "Voir ton historique d'humeur",
+    "pageDescription": "Quatre auto-évaluations validées et facultatives : l’évolution compte plus qu’un score isolé.",
     "attributionLabel": "Source",
     "attributionShow": "Source et licence pour {instrument}",
     "choosePrompt": "Choisis un bilan",

messages/it.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Benessere mentale",
-    "pageDescription": "Quattro autovalutazioni validate e facoltative — PHQ-9 (umore), GAD-7 (preoccupazione), WHO-5 (benessere) e SCI (sonno) — accanto al tuo diario dell'umore. Ciò che conta è l'andamento nel tempo, non un singolo numero.",
-    "moodLink": "Vedi il tuo andamento dell'umore",
+    "pageDescription": "Quattro autovalutazioni validate e facoltative: conta l’andamento, non il singolo punteggio.",
     "attributionLabel": "Fonte",
     "attributionShow": "Fonte e licenza di {instrument}",
     "choosePrompt": "Scegli un check-in",

messages/pl.json

@@ -8589,8 +8589,7 @@
   },
   "mentalHealth": {
     "pageTitle": "Dobrostan psychiczny",
-    "pageDescription": "Cztery zwalidowane, dobrowolne testy — PHQ-9 (nastrój), GAD-7 (lęk), WHO-5 (samopoczucie) i SCI (sen) — obok Twojego dziennika nastroju. Liczy się trend w czasie, a nie pojedynczy wynik.",
-    "moodLink": "Zobacz historię swojego nastroju",
+    "pageDescription": "Cztery zwalidowane, dobrowolne testy — liczy się przebieg w czasie, nie pojedynczy wynik.",
     "attributionLabel": "Źródło",
     "attributionShow": "Źródło i licencja: {instrument}",
     "choosePrompt": "Wybierz sprawdzenie",

src/components/mental-health/mental-wellbeing.tsx

@@ -28,9 +28,7 @@
  * the page someone arrives at to take stock.
  */
 import { useMemo, useState } from "react";
-import Link from "next/link";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
-import { ArrowRight } from "lucide-react";
 
 import { useTranslations } from "@/lib/i18n/context";
 import { apiGet, apiPost } from "@/lib/api/api-fetch";
@@ -179,18 +177,11 @@ export function MentalWellbeing() {
             )}
           </section>
 
-          {/* 2026-07-17 UX/IA audit M9 — mood tracking, this screener surface,
-              and the mood insights page form one mental-health domain but used
-              to be three unconnected islands. A quiet pointer to mood history,
-              mirroring the one added on `/mood` pointing back here. */}
-          <Link
-            href="/mood"
-            data-slot="mental-wellbeing-mood-link"
-            className="text-muted-foreground hover:text-foreground focus-visible:ring-ring/50 -mt-2 inline-flex items-center gap-1.5 self-start text-sm underline-offset-4 transition-colors hover:underline focus-visible:ring-[3px] focus-visible:outline-none"
-          >
-            {t("mentalHealth.moodLink")}
-            <ArrowRight className="size-3.5" aria-hidden="true" />
-          </Link>
+          {/* The pointer to mood history that used to sit here is gone. The
+              cross-link on `/mood` still points at this page, which is the
+              direction that earns its keep — someone logging a mood may not
+              know the screeners exist, while someone who came here for a
+              screener already knows where their mood diary is. */}
 
           {/* Per-instrument detail, opened from a card body: last result,
               trend chart, dated history, Start — the Verlauf lives here,