i18n(insights): EN + DE strings for the 7 insights sub-pages

Adds the labels the v1.4.25 W4 sub-pages reference:

  - insights.navOverview / insights.navSleep — two new tab pills on
    the strip ("Overview" + "Sleep" / "Übersicht" + "Schlaf").
  - insights.subPage.{blutdruck,gewicht,puls,stimmung,medikamente,bmi}
    Description — one-line scaffold under each sub-page heading,
    matching the Apple Health metric-page convention.
  - insights.subPage.stimmungEmpty{Title,Description,Action} +
    medikamenteEmpty{Title,Description,Action} — CTAs into /mood and
    /medications when the corresponding sub-page has zero data.
  - insights.sleep.* — title, description, headline caption, stage
    labels (deep/REM/core/asleep/awake/inBed), composition title +
    subtitle + ARIA label, plus an empty-state group pointing at
    /settings/devices for the v1.5 Apple Health sync teaser.

i18n-locale-integrity.test.ts keeps the EN + DE key set in lock-step;
no changes there because the new keys land identically in both files.

messages/de.json

@@ -934,13 +934,52 @@
     "relativeHoursAgo": "vor {count} Stunden",
     "relativeDaysAgo": "vor {count} Tagen",
     "navGeneral": "Allgemein",
+    "navOverview": "Übersicht",
     "navBloodPressure": "Blutdruck",
     "navWeight": "Gewicht",
     "navPulse": "Puls",
     "navMood": "Stimmung",
     "navMedication": "Medikamente",
     "navBmi": "BMI",
+    "navSleep": "Schlaf",
     "navAriaLabel": "Zu Abschnitt springen",
+    "subPage": {
+      "blutdruckDescription": "Dein systolisch-/diastolisch-Verlauf mit altersangepassten Zielbereichen und einer textbasierten KI-Einschätzung.",
+      "gewichtDescription": "Gewichtsverlauf gegen das aus deiner Größe abgeleitete gesunde Band, mit KI-Einschätzung.",
+      "pulsDescription": "Ruhepuls gegenüber dem persönlichen Karvonen-Zielband, mit KI-Einschätzung.",
+      "stimmungDescription": "Tägliche Stimmungswerte im Zeitverlauf mit einer textbasierten KI-Einschätzung.",
+      "stimmungEmptyTitle": "Erste Stimmung erfassen",
+      "stimmungEmptyDescription": "Stimmungs-Insights erscheinen, sobald du einige Einträge protokolliert hast. Tippe unten, um zu beginnen.",
+      "stimmungEmptyAction": "Stimmungs-Tagebuch öffnen",
+      "medikamenteDescription": "Einnahme-Kalender pro Medikament plus eine textbasierte KI-Einschätzung.",
+      "medikamenteEmptyTitle": "Erstes Medikament hinzufügen",
+      "medikamenteEmptyDescription": "Adhärenz-Insights brauchen mindestens ein erfasstes Medikament.",
+      "medikamenteEmptyAction": "Medikamente öffnen",
+      "bmiDescription": "BMI aus deinem Gewicht und deiner Größe abgeleitet, mit KI-Einschätzung."
+    },
+    "sleep": {
+      "title": "Schlaf",
+      "description": "Phasen-Aufschlüsselung und nächtliche Dauer – gezogen aus Apple Health.",
+      "headlineTitle": "Durchschnitt pro Nacht",
+      "headlineCaption": "Gemittelt über {count} Nächte – {suffix}",
+      "compositionTitle": "Phasen-Verteilung",
+      "compositionSubtitle": "Letzte {nights} Nächte",
+      "compositionAriaLabel": "Schlafphasen-Verteilung über {nights} Nächte",
+      "stages": {
+        "deep": "Tief",
+        "rem": "REM",
+        "core": "Kern",
+        "asleep": "Schlafend",
+        "awake": "Wach",
+        "inBed": "Im Bett",
+        "unavailable": "Noch keine Phasen-Daten – Apple-Health-Sync für Schlafphasen folgt mit v1.5."
+      },
+      "empty": {
+        "title": "Noch keine Schlafdaten",
+        "description": "Apple-Health-Sync folgt mit v1.5 und füllt diese Ansicht automatisch.",
+        "action": "Geräte verwalten"
+      }
+    },
     "measurementsOverDays": "{count} Messungen über {days} Tage",
     "healthStatus": "Gesundheitsstatus",
     "noWeightData": "Keine Gewichtsdaten oder Größe nicht hinterlegt.",

messages/en.json

@@ -934,13 +934,52 @@
     "relativeHoursAgo": "{count} hours ago",
     "relativeDaysAgo": "{count} days ago",
     "navGeneral": "General",
+    "navOverview": "Overview",
     "navBloodPressure": "Blood Pressure",
     "navWeight": "Weight",
     "navPulse": "Pulse",
     "navMood": "Mood",
     "navMedication": "Medication",
     "navBmi": "BMI",
+    "navSleep": "Sleep",
     "navAriaLabel": "Skip to section",
+    "subPage": {
+      "blutdruckDescription": "Your systolic / diastolic trend with age-personalised target zones and a written AI assessment.",
+      "gewichtDescription": "Weight trend mapped against your height-derived healthy band, plus an AI assessment.",
+      "pulsDescription": "Resting pulse vs. the personalised Karvonen target band, plus an AI assessment.",
+      "stimmungDescription": "Daily mood scores over time with a written AI assessment.",
+      "stimmungEmptyTitle": "Log your first mood",
+      "stimmungEmptyDescription": "Mood insights light up once you've logged a few entries. Tap below to get started.",
+      "stimmungEmptyAction": "Open mood journal",
+      "medikamenteDescription": "Per-medication adherence calendars and a written AI assessment.",
+      "medikamenteEmptyTitle": "Add your first medication",
+      "medikamenteEmptyDescription": "Compliance insights need at least one tracked medication.",
+      "medikamenteEmptyAction": "Open medications",
+      "bmiDescription": "BMI derived from your weight and height, with a written AI assessment."
+    },
+    "sleep": {
+      "title": "Sleep",
+      "description": "Stage breakdown and nightly duration, drawn from Apple Health.",
+      "headlineTitle": "Average per night",
+      "headlineCaption": "Averaged across {count} nights — {suffix}",
+      "compositionTitle": "Stage composition",
+      "compositionSubtitle": "Last {nights} nights",
+      "compositionAriaLabel": "Sleep stage composition over {nights} nights",
+      "stages": {
+        "deep": "Deep",
+        "rem": "REM",
+        "core": "Core",
+        "asleep": "Asleep",
+        "awake": "Awake",
+        "inBed": "In bed",
+        "unavailable": "No stage data yet — Apple Health stage syncing arrives in v1.5."
+      },
+      "empty": {
+        "title": "No sleep data yet",
+        "description": "Apple Health sync arrives in v1.5 and will fill this in automatically.",
+        "action": "Manage devices"
+      }
+    },
     "measurementsOverDays": "{count} measurements over {days} days",
     "healthStatus": "Health Status",
     "noWeightData": "No weight data or height not set.",