feat: manual nutrition entry on recipe editor

Lets authors enter nutrition values by hand instead of relying only on
the AI estimate; the detail-page panel now shows whether data was
manually entered or AI-estimated and offers to switch between them.

v0.35.0

apps/web/messages/en.json

@@ -477,7 +477,9 @@
     "carbs": "Carbs",
     "fat": "Fat",
     "fiber": "Fiber",
-    "sodium": "Sodium"
+    "sodium": "Sodium",
+    "manualBadge": "Manually entered",
+    "estimateInsteadButton": "Estimate with AI instead"
   },
   "nutritionDiary": {
     "title": "Nutrition Diary",
@@ -709,6 +711,9 @@
     "tagsPlaceholder": "Add tags… (press Enter)",
     "removeTagAriaLabel": "Remove tag {tag}",
     "dietaryTags": "Dietary tags",
+    "nutritionToggle": "Add nutrition info manually",
+    "nutritionToggleHelp": "Per serving. Turns off the AI-estimate action on the recipe page — clear these fields (turn this off) to let AI estimate it instead.",
+    "calories": "Calories (kcal)",
     "photos": "Photos",
     "ingredients": "Ingredients",
     "amount": "Amount",