1.1.5: conversion funnel overhaul

Paywall:
- Redesigned PremiumView with yearly/monthly/lifetime side by side
- 7-day free trial badge with savings % vs monthly
- Social proof line, BEST VALUE highlight on yearly
- StoreManager: new yearlyProduct, lifetimeProduct, yearlySavingsPercent, hasTrialAvailable

Funnel:
- Paywall step added to onboarding (PaywallStepView)
- Contextual modal at dish limit (replaces silent block)
- Visible "X/15 dishes" counter in DishListView
- BottomPromoBanner rotates AdMob with internal "Remove ads" CTA (1 in 4)
- Free dish limit lowered 20 → 15
- Review prompt earlier: 2 weeks → 1 week

Analytics:
- paywall_viewed/dismissed with source + seconds_on_screen
- dish_limit_hit, week_limit_hit, free_trial_started events
- Every PremiumView call site now passes its source

StoreKit:
- MealMood.storekit: added yearly $19.99 + 7d trial, monthly trial, lifetime $39.99
- AppStoreConnect-1.1.5-setup.md with full manual setup instructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

MealMood/Views/Home/HomeView.swift

@@ -13,6 +13,7 @@ struct HomeView: View {
     @StateObject private var viewModel = HomeViewModel()
     @State private var editingDish: Dish?
     @State private var showPremiumFromExport: Bool = false
+    @State private var paywallSource: String = "unknown"
     @State private var showMonthlyHistory: Bool = false
     @State private var showStats: Bool = false
     @State private var showWeekLimitUpsell: Bool = false
@@ -111,6 +112,8 @@ struct HomeView: View {
                                     withAnimation(.easeInOut(duration: 0.2)) {
                                         showWeekLimitUpsell = true
                                     }
+                                    AnalyticsService.logWeekLimitHit()
+                                    paywallSource = "week_limit"
                                     showPremiumFromExport = true
                                     HapticManager.shared.notification(type: .warning)
                                 }
@@ -218,6 +221,7 @@ struct HomeView: View {
                     messageKey: "premium_limit_future_weeks",
                     actionTitleKey: "premium_subscribe"
                 ) {
+                    paywallSource = "week_limit_banner"
                     showPremiumFromExport = true
                 }
                 .padding(.horizontal, 16)
@@ -267,7 +271,7 @@ struct HomeView: View {
         .frame(maxHeight: .infinity, alignment: .top)
         .safeAreaInset(edge: .bottom, spacing: 0) {
             if !settings.isPremium && !isRunningOnMac {
-                AdBannerView()
+                BottomPromoBanner(settings: settings)
             }
         }
         .alert("reset_title", isPresented: $viewModel.showResetAlert) {
@@ -312,6 +316,7 @@ struct HomeView: View {
         .alert("onboarding_premium_prompt_title", isPresented: $showPostOnboardingPremiumPrompt) {
             Button("onboarding_premium_prompt_cta") {
                 UserDefaults.standard.set(false, forKey: OnboardingViewModel.pendingPremiumPromptKey)
+                paywallSource = "post_onboarding"
                 showPremiumFromExport = true
             }
             Button("reset_cancel", role: .cancel) {
@@ -459,7 +464,7 @@ struct HomeView: View {
         }
         .sheet(isPresented: $showPremiumFromExport) {
             NavigationStack {
-                PremiumView(settings: settings)
+                PremiumView(settings: settings, source: paywallSource)
             }
         }
         .sheet(isPresented: $showExportStylePicker) {
@@ -727,6 +732,8 @@ struct HomeView: View {
             withAnimation(.easeInOut(duration: 0.2)) {
                 showWeekLimitUpsell = true
             }
+            AnalyticsService.logWeekLimitHit()
+            paywallSource = "week_picker"
             showPremiumFromExport = true
             HapticManager.shared.notification(type: .warning)
         }
@@ -819,6 +826,7 @@ struct HomeView: View {
                 .buttonStyle(.plain)
             } else {
                 Button {
+                    paywallSource = "share_week"
                     showPremiumFromExport = true
                 } label: {
                     Label("share_week_button", systemImage: "star.fill")