2.0: sync CloudKit en tiempo real vía push silencioso

NSPersistentCloudKitContainer solo sincronizaba de forma oportunista (sin
push), por lo que un plato nuevo tardaba mucho o no aparecía en el otro
dispositivo. Se activa el push de CloudKit:

- aps-environment en MealMood.entitlements vía variable APS_ENVIRONMENT
  (development en Debug, production en Release) para no romper TestFlight.
- AppDelegate con registerForRemoteNotifications() + manejo del push
  silencioso; el mirror de SwiftData importa al ser despertado.
- (Capability Push Notifications habilitada en el App ID por API.)

Pendiente: regenerar el provisioning profile AppStore con Push antes de
la build 63, y validar el sync push en iPhone+iPad vía TestFlight.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A3HaWmmtTQ1vdTERtSYU6p

MealMood.xcodeproj/project.pbxproj

@@ -923,6 +923,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_ENTITLEMENTS = MealMood/Resources/MealMood.entitlements;
+				APS_ENVIRONMENT = production;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CURRENT_PROJECT_VERSION = 62;
 				DEVELOPMENT_TEAM = 2825Q76T7H;
@@ -1028,6 +1029,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_ENTITLEMENTS = MealMood/Resources/MealMood.entitlements;
+				APS_ENVIRONMENT = development;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				CURRENT_PROJECT_VERSION = 62;
 				DEVELOPMENT_TEAM = 2825Q76T7H;

MealMood/MealMoodApp.swift

@@ -1,11 +1,32 @@
 import SwiftUI
 import SwiftData
+import UIKit
 import FirebaseCore
 import FirebaseCrashlytics
 #if canImport(GoogleMobileAds)
 import GoogleMobileAds
 #endif
 
+/// Registers for remote notifications so CloudKit (the NSPersistentCloudKitContainer
+/// behind SwiftData) receives its silent-push subscriptions and imports changes
+/// in near-real-time across devices. Silent pushes are coalesced by the system,
+/// so battery cost is negligible — no polling.
+final class AppDelegate: NSObject, UIApplicationDelegate {
+    func application(_ application: UIApplication,
+                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
+        application.registerForRemoteNotifications()
+        return true
+    }
+
+    func application(_ application: UIApplication,
+                     didReceiveRemoteNotification userInfo: [AnyHashable: Any],
+                     fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
+        // CloudKit silent push: SwiftData's mirror imports on its own once woken;
+        // report new data so the system keeps delivering sync pushes.
+        completionHandler(.newData)
+    }
+}
+
 /// Whether the store is syncing through CloudKit this launch. When true, the
 /// legacy iCloud KV snapshot sync must stay inert (both would fight).
 enum CloudSyncRuntime {
@@ -16,6 +37,8 @@ enum CloudSyncRuntime {
 
 @main
 struct MealMoodApp: App {
+    @UIApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
+
     private let modelContainer: ModelContainer = {
         let schema = Schema([
             AppSettings.self,

MealMood/Resources/MealMood.entitlements

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "https://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>aps-environment</key>
+	<string>$(APS_ENVIRONMENT)</string>
 	<key>com.apple.developer.icloud-container-identifiers</key>
 	<array>
 		<string>iCloud.com.alexandrev.mealmood</string>