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/Views/Home/HomeView.swift

@@ -24,6 +24,7 @@ struct HomeView: View {
     @State private var weekPickerDate: Date = Date()
     @State private var showCopyPreviousConfirm: Bool = false
     @State private var copyPreviousSource: String = "menu"
+    @State private var showShoppingList: Bool = false
     @State private var showReviewSentimentPrompt: Bool = false
     @State private var showReviewSupportPrompt: Bool = false
     @State private var showPostOnboardingAutoAssignPrompt: Bool = false
@@ -68,6 +69,14 @@ struct HomeView: View {
                                 .foregroundColor(.mealMoodTextPrimary)
                         }
 
+                        Button {
+                            showShoppingList = true
+                        } label: {
+                            Image(systemName: "cart")
+                                .foregroundColor(.mealMoodTextPrimary)
+                        }
+                        .accessibilityLabel(Text("shopping_list_title"))
+
                         if settings?.isPremium == true {
                             Button {
                                 showStats = true
@@ -521,6 +530,13 @@ struct HomeView: View {
         .sheet(isPresented: $showStats) {
             StatsView(weekPlans: weekPlans, allDishes: dishes, allTags: tags, language: settings.languageEnum.resolved())
         }
+        .sheet(isPresented: $showShoppingList) {
+            ShoppingListView(
+                weekStartDate: viewModel.currentWeekStart,
+                plan: plan,
+                settings: settings
+            )
+        }
         .task {
             // Permission is now requested contextually (onboarding Week Ready step or
             // the Settings toggle) — no cold OS prompt on first Home load.