[push/opt-in-prompts] Implement push notifications client integration

Build the full client half of docs/api/push-notifications-integration-guide.md:
OS permission + APNs device-token registration and pipeline wiring, profile
notifications/biometric-login toggles on the Ver Perfil screen reflecting
server truth, order-tracking opt-in fallback prompt, profile-cache refresh
on every mutation, a Notification Service Extension for rich/image push,
the Push Notifications capability, targeting-attributes sync, campaign open
tracking, and tap-to-order deep linking with foreground notification display.

Sources/PediFoods/Views/Main/OrdersView.swift

@@ -51,6 +51,12 @@ struct OrdersView: View {
             await loadOrdersIfNeeded()
             await refreshStoreRatings()
         }
+        .onAppear {
+            if let pending = appState.pendingOrderDeepLink {
+                appState.pendingOrderDeepLink = nil
+                selectedOrderRoute = pending
+            }
+        }
         .refreshable {
             // Decoupled from .refreshable's own cancellable wrapping Task —
             // see StoreDetailView's .refreshable for why.