feat: cooking history/gallery, unit conversion, nutrition diary, pantry scan, digest cron, nutrition-targeted meal plans

Six M-sized items from HANDOFF.md's new-features backlog:

- Profile tabs: cooking-history stats (total cooked, last-cooked, streak)
  and a "cooked it" photo gallery, both owner-only
- Display-time unit conversion (metric<->imperial) for recipe ingredients,
  respecting each user's unitPref; original value always shown alongside
  the conversion
- Nutrition daily diary: per-day macro totals computed from cooking history
  x recipe nutritionData, compared against user goals
- Pantry scan: real barcode lookup (zxing + Open Food Facts, no API key)
  with an AI-vision fallback for unbarcoded items, always confirm-before-
  insert, both paths tier/rate-limited like other AI features
- Weekly digest email: new followers/comments/ratings + trending recipes,
  sent via a new `cron` Docker stage (alpine+crond+curl) and `digest-cron`
  compose service hitting a bearer-token-protected internal route
- Meal-plan generation can now target a user's nutrition goals as a
  prompt-level nudge (recipes are AI-invented, not DB-sourced, so this
  can't be a hard macro constraint)

Caught a real deploy-breaking issue while adding the cron stage: appending
it after `runner` silently changed the Dockerfile's default build target,
and `web`'s compose config didn't pin one — fixed by pinning `target:
runner` explicitly. Verified with typecheck, lint, and three separate
`docker build --target` runs (runner/cron/migrator) plus `docker compose
config` validation.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/messages/en.json

@@ -7,6 +7,7 @@
     "feed": "Feed",
     "collections": "Collections",
     "mealPlan": "Meal Plan",
+    "nutrition": "Nutrition",
     "pantry": "Pantry",
     "shopping": "Shopping",
     "settings": "Settings",
@@ -303,7 +304,8 @@
     },
     "nutritionGoals": {
       "title": "Daily Nutrition Goals",
-      "description": "Set your daily targets. These are shown as progress bars on your meal plan."
+      "description": "Set your daily targets. These are shown as progress bars on your meal plan.",
+      "viewDiaryCta": "View nutrition diary"
     },
     "webhooksPage": {
       "title": "Webhooks",
@@ -398,6 +400,27 @@
     "fiber": "Fiber",
     "sodium": "Sodium"
   },
+  "nutritionDiary": {
+    "title": "Nutrition Diary",
+    "subtitle": "Your daily nutrition intake, computed from what you've cooked.",
+    "dateLabel": "Date",
+    "today": "Today",
+    "loading": "Loading…",
+    "loadError": "Couldn't load your nutrition diary. Please try again.",
+    "goalNotSet": "You haven't set daily nutrition goals yet.",
+    "setGoalsCta": "Set goals",
+    "calories": "Calories",
+    "protein": "Protein",
+    "carbs": "Carbs",
+    "fat": "Fat",
+    "fiber": "Fiber",
+    "sodium": "Sodium",
+    "entriesTitle": "Recipes cooked",
+    "noEntries": "Nothing logged for this day. Mark a recipe as \"cooked\" to see it here.",
+    "servingsLabel": "{count, plural, one {1 serving} other {{count} servings}}",
+    "nutritionUnknownBadge": "Nutrition unknown",
+    "unknownNote": "{count, plural, one {1 entry has no nutrition data and isn't included in the totals above.} other {{count} entries have no nutrition data and aren't included in the totals above.}}"
+  },
   "explore": {
     "title": "Explore",
     "searchPlaceholder": "Search public recipes…",
@@ -430,12 +453,11 @@
     "copyMarkdown": "Copy as Markdown",
     "downloadMarkdown": "Download as Markdown",
     "copiedToClipboard": "Copied to clipboard",
-    "copyFailed": "Failed to copy",
+    "copyFailed": "Failed to copy to clipboard",
     "print": "Print",
     "share": "Share",
     "deleteFailed": "Delete failed",
     "updateFailed": "Update failed",
-    "copyFailed": "Failed to copy to clipboard",
     "deleted": "Deleted",
     "cancel": "Cancel",
     "delete": "Delete",
@@ -646,6 +668,8 @@
     "includePantryItems": "Include pantry items",
     "pantryMode": "Pantry mode — maximize use of what you have",
     "pantryModeDescription": "Prefer meals that use multiple pantry ingredients and minimize extra shopping.",
+    "targetNutritionGoals": "Target my nutrition goals",
+    "targetNutritionGoalsDescription": "Nudge the AI to aim for your daily calorie and macro targets across the day's meals.",
     "removeFailed": "Failed to remove",
     "generationFailed": "Generation failed",
     "anyDifficulty": "Any",
@@ -691,7 +715,26 @@
     "colItem": "Item",
     "colQuantity": "Quantity",
     "colExpires": "Expires",
-    "expiredDaysAgo": "Expired {days}d ago"
+    "expiredDaysAgo": "Expired {days}d ago",
+    "scan": "Scan",
+    "scanTitle": "Add by scan",
+    "scanDescription": "Scan a barcode or take a photo to quickly add pantry items.",
+    "scanBarcodeOption": "Scan barcode",
+    "scanPhotoOption": "Take/upload photo",
+    "scanBarcodeTitle": "Scan barcode",
+    "scanBarcodeDescription": "Point your camera at a product barcode.",
+    "scanConfirmTitle": "Confirm item",
+    "scanConfirmDescription": "Review and edit before adding to your pantry.",
+    "scanAnalyzingTitle": "Analyzing photo",
+    "scanAnalyzingDescription": "Identifying items in your photo…",
+    "scanBack": "Back",
+    "scanAddToPantry": "Add to pantry",
+    "scanAdded": "Added to pantry",
+    "scanLookupFailed": "Barcode lookup failed",
+    "scanNotFound": "Product not found. Try a photo scan instead.",
+    "scanPhotoFailed": "Photo scan failed",
+    "scanNoItemsFound": "No items recognized in this photo",
+    "cameraError": "Couldn't access the camera"
   },
   "feed": {
     "title": "Feed",
@@ -984,5 +1027,21 @@
     "privateBio": "AI context (private)",
     "privateBioDescription": "Never shown publicly. Injected into AI prompts to personalise suggestions — add your dietary preferences, kitchen equipment, cooking skill level, allergies, etc.",
     "privateBioPlaceholder": "e.g. I'm vegetarian, have a stand mixer and an air fryer, intermediate cook, allergic to tree nuts, prefer Mediterranean flavours…"
+  },
+  "profilePage": {
+    "tabRecipes": "Recipes",
+    "tabHistory": "Cooking History",
+    "tabPhotos": "Photos",
+    "statTotalCooked": "Total times cooked",
+    "statStreak": "Current streak",
+    "statLastCooked": "Last cooked",
+    "streakDays": "{count, plural, one {# day} other {# days}}",
+    "noneYet": "None yet",
+    "recentActivity": "Recent activity",
+    "noHistoryYet": "No cooking history yet.",
+    "noPhotosYet": "No photos yet.",
+    "previous": "Previous",
+    "next": "Next",
+    "pageOf": "Page {page} of {total}"
   }
 }