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/Services/AnalyticsService.swift

@@ -35,6 +35,13 @@ enum AnalyticsEvent {
 
     // Feedback loop
     static let weekRated = "week_rated"
+
+    // Conversion funnel (1.1.5)
+    static let paywallViewed = "paywall_viewed"
+    static let paywallDismissed = "paywall_dismissed"
+    static let dishLimitHit = "dish_limit_hit"
+    static let weekLimitHit = "week_limit_hit"
+    static let freeTrialStarted = "free_trial_started"
 }
 
 enum AnalyticsService {
@@ -118,4 +125,28 @@ enum AnalyticsService {
         let value = rating == 1 ? "liked" : rating == -1 ? "disliked" : "cleared"
         logEvent(AnalyticsEvent.weekRated, parameters: ["rating": value])
     }
+
+    static func logPaywallViewed(source: String) {
+        logEvent(AnalyticsEvent.paywallViewed, parameters: ["source": source])
+    }
+
+    static func logPaywallDismissed(source: String, secondsOnScreen: Int, didConvert: Bool) {
+        logEvent(AnalyticsEvent.paywallDismissed, parameters: [
+            "source": source,
+            "seconds_on_screen": secondsOnScreen,
+            "did_convert": didConvert
+        ])
+    }
+
+    static func logDishLimitHit() {
+        logEvent(AnalyticsEvent.dishLimitHit)
+    }
+
+    static func logWeekLimitHit() {
+        logEvent(AnalyticsEvent.weekLimitHit)
+    }
+
+    static func logFreeTrialStarted(plan: String) {
+        logEvent(AnalyticsEvent.freeTrialStarted, parameters: ["plan": plan])
+    }
 }