Replace EventLogger with typed AnalyticsManager using PostHog

Complete analytics overhaul: delete EventLogger.swift, create Analytics.swift
with typed event enum (~45 events), screen tracking, super properties
(theme, icon pack, voting layout, etc.), session replay with kill switch,
autocapture, and network telemetry. Replace all 99 call sites across 38 files
with compiler-enforced typed events in object_action naming convention.

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

Shared/Views/PurchaseButtonView.swift

@@ -32,7 +32,7 @@ struct PurchaseButtonView: View {
         .background(theme.currentTheme.secondaryBGColor)
         .cornerRadius(10)
         .sheet(isPresented: $showSubscriptionStore) {
-            FeelsSubscriptionStoreView()
+            FeelsSubscriptionStoreView(source: "purchase_button")
         }
         .manageSubscriptionsSheet(isPresented: $showManageSubscriptions)
     }
@@ -104,7 +104,8 @@ struct PurchaseButtonView: View {
 
     private var subscriptionStatusBadge: some View {
         Group {
-            if case .subscribed(_, let willAutoRenew) = iapManager.state {
+            switch iapManager.state {
+            case .subscribed(_, let willAutoRenew):
                 if willAutoRenew {
                     Text(String(localized: "subscription_status_active"))
                         .font(.caption)
@@ -122,6 +123,16 @@ struct PurchaseButtonView: View {
                         .background(Color.orange)
                         .cornerRadius(4)
                 }
+            case .billingRetry, .gracePeriod:
+                Text("Payment Issue")
+                    .font(.caption)
+                    .foregroundColor(.white)
+                    .padding(.horizontal, 8)
+                    .padding(.vertical, 4)
+                    .background(Color.orange)
+                    .cornerRadius(4)
+            default:
+                EmptyView()
             }
         }
     }
@@ -166,7 +177,7 @@ struct PurchaseButtonView: View {
             // Restore purchases
             Button {
                 Task {
-                    await iapManager.restore()
+                    await iapManager.restore(source: "purchase_button")
                 }
             } label: {
                 Text(String(localized: "purchase_view_restore"))