feat(mental-health): recommend a gentle check-in rhythm in the page intro

Both instruments ask about the last two weeks, so the landing gains one
soft sentence suggesting a check-in every two to four weeks — an
orientation aid, not a directive. All six locales.

messages/de.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Check-in zum seelischen Wohlbefinden",
     "pageDescription": "Zwei validierte, freiwillige Selbsttests — PHQ-9 (Stimmung) und GAD-7 (Sorgen) — ergänzend zu deinem Stimmungstagebuch. Aussagekräftig ist der Verlauf über die Zeit, nicht ein einzelner Wert.",
+    "pageRhythmHint": "Beide Tests blicken auf die letzten zwei Wochen zurück — ein Check-in alle zwei bis vier Wochen ist deshalb ein guter Rhythmus.",
     "attributionLabel": "Quelle",
     "choosePrompt": "Check-in auswählen",
     "start": "Starten",

messages/en.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Mental wellbeing check-in",
     "pageDescription": "Two validated, opt-in self-assessments — PHQ-9 (mood) and GAD-7 (worry) — that sit beside your mood tracking. The value is the trend over time, not any single number.",
+    "pageRhythmHint": "Both tests look back over the last two weeks, so a check-in every two to four weeks is a comfortable rhythm.",
     "attributionLabel": "Attribution",
     "choosePrompt": "Choose a check-in",
     "start": "Start",

messages/es.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Revisión de bienestar mental",
     "pageDescription": "Dos autoevaluaciones validadas y opcionales — PHQ-9 (estado de ánimo) y GAD-7 (preocupación) — junto a tu registro de ánimo. Lo valioso es la tendencia en el tiempo, no un único número.",
+    "pageRhythmHint": "Ambos tests se refieren a las últimas dos semanas, por lo que un check-in cada dos a cuatro semanas es un buen ritmo.",
     "attributionLabel": "Fuente",
     "choosePrompt": "Elige una revisión",
     "start": "Empezar",

messages/fr.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Point sur le bien-être mental",
     "pageDescription": "Deux auto-évaluations validées et facultatives — PHQ-9 (humeur) et GAD-7 (inquiétude) — en complément de ton suivi de l'humeur. Ce qui compte, c'est la tendance dans le temps, pas un chiffre isolé.",
+    "pageRhythmHint": "Les deux tests portent sur les deux dernières semaines — un check-in toutes les deux à quatre semaines est donc un bon rythme.",
     "attributionLabel": "Source",
     "choosePrompt": "Choisis un bilan",
     "start": "Commencer",

messages/it.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Check-in sul benessere mentale",
     "pageDescription": "Due autovalutazioni validate e facoltative — PHQ-9 (umore) e GAD-7 (preoccupazione) — accanto al tuo diario dell'umore. Ciò che conta è l'andamento nel tempo, non un singolo numero.",
+    "pageRhythmHint": "Entrambi i test riguardano le ultime due settimane, quindi un check-in ogni due-quattro settimane è un buon ritmo.",
     "attributionLabel": "Fonte",
     "choosePrompt": "Scegli un check-in",
     "start": "Inizia",

messages/pl.json

@@ -7626,6 +7626,7 @@
   "mentalHealth": {
     "pageTitle": "Sprawdzenie dobrostanu psychicznego",
     "pageDescription": "Dwa zwalidowane, dobrowolne testy — PHQ-9 (nastrój) i GAD-7 (lęk) — obok Twojego dziennika nastroju. Liczy się trend w czasie, a nie pojedynczy wynik.",
+    "pageRhythmHint": "Oba testy dotyczą ostatnich dwóch tygodni, dlatego check-in co dwa–cztery tygodnie to dobry rytm.",
     "attributionLabel": "Źródło",
     "choosePrompt": "Wybierz sprawdzenie",
     "start": "Rozpocznij",

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

@@ -113,6 +113,13 @@ export function MentalWellbeing() {
             description={t("mentalHealth.pageDescription")}
           />
 
+          {/* v1.27.6 — one gentle cadence hint: both instruments ask about
+              the last two weeks, so every 2–4 weeks is a sensible rhythm.
+              Body prose (foreground), not another muted description line. */}
+          <p className="max-w-prose text-sm">
+            {t("mentalHealth.pageRhythmHint")}
+          </p>
+
           <section aria-label={t("mentalHealth.choosePrompt")}>
             <h2 className="sr-only">{t("mentalHealth.choosePrompt")}</h2>
             <ul className="grid list-none gap-4 p-0 sm:grid-cols-2">