2.0: weekly shopping list from planned dishes

- ShoppingItem model (per-week lines; dish-derived or free-text) + schema.
- ShoppingListService.reconcile mirrors planned dishes' ingredients into the
  list, preserving check-off state and user items; plain-text export helper.
- ShoppingListView: grouped by dish, check-off, swipe-delete, free-text adds,
  clear-checked, ShareLink export, and inline on-device "Generate" for planned
  dishes without ingredients (paywall after 3 free generations,
  source=ingredient_generation).
- Home toolbar: cart entry point (all users) + sheet.
- Analytics: shopping_list_opened, shopping_item_added, ingredients_generated.
- Localized in all 6 languages.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BkanrydYtrme8wipTzWssG

MealMood/MealMoodApp.swift

@@ -14,7 +14,8 @@ struct MealMoodApp: App {
             Tag.self,
             Dish.self,
             WeekPlan.self,
-            MealSlot.self
+            MealSlot.self,
+            ShoppingItem.self
         ])
         let configuration = ModelConfiguration(cloudKitDatabase: .none)
         do {