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/app/(app)/meal-plan/page.tsx

@@ -3,7 +3,7 @@ import { headers } from "next/headers";
 import Link from "next/link";
 import { ChevronLeft, ChevronRight, ShoppingCart, Printer } from "lucide-react";
 import { auth } from "@/lib/auth/server";
-import { db, mealPlans, mealPlanMembers, recipes, eq, and, desc } from "@epicure/db";
+import { db, mealPlans, mealPlanMembers, recipes, userNutritionGoals, eq, and, desc } from "@epicure/db";
 import { buttonVariants } from "@/components/ui/button";
 import { MealPlanner } from "@/components/meal-plan/meal-planner";
 import { ShareMealPlanButton } from "@/components/meal-plan/share-meal-plan-button";
@@ -52,7 +52,7 @@ export default async function MealPlanPage({
   const sunday = addWeeks(monday, 1);
   sunday.setDate(sunday.getDate() - 1);
 
-  const [plan, userRecipes, sharedMemberships] = await Promise.all([
+  const [plan, userRecipes, sharedMemberships, nutritionGoals] = await Promise.all([
     db.query.mealPlans.findFirst({
       where: and(eq(mealPlans.userId, session.user.id), eq(mealPlans.weekStart, weekStart)),
       with: {
@@ -70,8 +70,16 @@ export default async function MealPlanPage({
       where: eq(mealPlanMembers.userId, session.user.id),
       with: { mealPlan: { with: { user: true } } },
     }),
+    db.query.userNutritionGoals.findFirst({
+      where: eq(userNutritionGoals.userId, session.user.id),
+    }),
   ]);
 
+  const hasNutritionGoals = !!(
+    nutritionGoals &&
+    (nutritionGoals.caloriesKcal || nutritionGoals.proteinG || nutritionGoals.carbsG || nutritionGoals.fatG)
+  );
+
   const entries = (plan?.entries ?? []).map((e) => ({
     id: e.id,
     day: e.day,
@@ -114,7 +122,7 @@ export default async function MealPlanPage({
       </div>
 
       <WeeklyNutritionBar weekStart={weekStart} />
-      <MealPlanner weekStart={weekStart} initialEntries={entries} userRecipes={userRecipes} />
+      <MealPlanner weekStart={weekStart} initialEntries={entries} userRecipes={userRecipes} hasNutritionGoals={hasNutritionGoals} />
 
       {sharedMemberships.length > 0 && (
         <div className="space-y-3">