i18n(food): translate /food/[id] +page.svelte via $_() — meal detail page

- <title> with {description} interpolation, untitled fallback
- Back link, "Mahlzeit nicht gefunden." empty-state
- Lightbox aria-labels (vergrößern/schließen)
- Nutrient grid labels (Kalorien/Protein/Kohlenhydrate/Fett) via food.nutrition.* + Ballaststoffe/Zucker via food.detail.fiber_with_value/sugar_with_value
- Action buttons: Bearbeiten, "🔄 Erneut analysieren" + Analysiere…, Löschen + Sicher? + Abbrechen + delete-confirm Löschen
- Edit form: Mahlzeittyp/Beschreibung labels, Nährwerte heading, 6 nutrient input labels, Abbrechen/Speichere…/Speichern
- Foods section heading "Erkannte Bestandteile"
- Date formatter `toLocaleString('de-DE', …)` → `toLocaleString(get(locale) ?? 'de', …)`
- All 4 catch-block error fallbacks routed via $_()

Baselines: hardcoded 1140 → 1130 (10 cleared); missing-keys baseline unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/i18n-hardcoded-baseline.json

@@ -239,7 +239,6 @@
 	"apps/mana/apps/web/src/routes/(app)/context/documents/+page.svelte": 5,
 	"apps/mana/apps/web/src/routes/(app)/context/spaces/[id]/+page.svelte": 3,
 	"apps/mana/apps/web/src/routes/(app)/context/spaces/+page.svelte": 5,
-	"apps/mana/apps/web/src/routes/(app)/food/[id]/+page.svelte": 10,
 	"apps/mana/apps/web/src/routes/(app)/food/+page.svelte": 7,
 	"apps/mana/apps/web/src/routes/(app)/food/add/+page.svelte": 2,
 	"apps/mana/apps/web/src/routes/(app)/food/goals/+page.svelte": 1,