fix(measurements): label DayDrillDown GET failure as load error not save error

The per-day drill-down used measurements.saveError in its fetch-error branch, which surfaced 'Fehler beim Speichern' on a read failure. Adds a measurements.loadError key in every locale and points the GET error path at it.

messages/de.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "z.B. nach dem Essen",
     "formReset": "Formular zurücksetzen",
     "saveError": "Fehler beim Speichern",
+    "loadError": "Fehler beim Laden",
     "duplicateTimestamp": "Zum gewählten Zeitpunkt existiert bereits ein Messwert dieses Typs.",
     "deleteError": "Fehler beim Löschen",
     "invalidValue": "Bitte einen gültigen Wert eingeben.",

messages/en.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "e.g. after a meal",
     "formReset": "Reset form",
     "saveError": "Error saving",
+    "loadError": "Could not load measurements",
     "duplicateTimestamp": "A measurement of this type already exists at the selected timestamp.",
     "deleteError": "Error deleting",
     "invalidValue": "Please enter a valid value.",

messages/es.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "p. ej. después de comer",
     "formReset": "Restablecer formulario",
     "saveError": "Error al guardar",
+    "loadError": "No se han podido cargar las mediciones",
     "duplicateTimestamp": "Ya existe una medición de este tipo en la marca de tiempo seleccionada.",
     "deleteError": "Error al eliminar",
     "invalidValue": "Introduce un valor válido.",

messages/fr.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "p. ex. après le repas",
     "formReset": "Réinitialiser le formulaire",
     "saveError": "Erreur lors de l’enregistrement",
+    "loadError": "Impossible de charger les mesures",
     "duplicateTimestamp": "Une mesure de ce type existe déjà à cet horodatage.",
     "deleteError": "Erreur lors de la suppression",
     "invalidValue": "Saisis une valeur valide.",

messages/it.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "es. dopo il pasto",
     "formReset": "Reimposta modulo",
     "saveError": "Errore durante il salvataggio",
+    "loadError": "Impossibile caricare le misurazioni",
     "duplicateTimestamp": "Esiste già una misurazione di questo tipo a questa marca temporale.",
     "deleteError": "Errore durante l’eliminazione",
     "invalidValue": "Inserisci un valore valido.",

messages/pl.json

@@ -346,6 +346,7 @@
     "notesPlaceholder": "np. po jedzeniu",
     "formReset": "Resetuj formularz",
     "saveError": "Błąd zapisu",
+    "loadError": "Nie udało się wczytać pomiarów",
     "duplicateTimestamp": "Pomiar tego typu już istnieje dla wybranej daty.",
     "deleteError": "Błąd usuwania",
     "invalidValue": "Wprowadź poprawną wartość.",

src/components/measurements/measurement-list.tsx

@@ -1055,7 +1055,7 @@ function DayDrillDown({
   if (error) {
     return (
       <div className="text-destructive py-2 text-xs">
-        {t("measurements.saveError")}
+        {t("measurements.loadError")}
       </div>
     );
   }