feat(iap): wire real AdMob app id, banner and interstitial units

App id always uses the real value (SDK init only, no ad-serving risk).
Banner/interstitial pick the real unit id in release builds and Google's
test unit id everywhere else, so debug/profile builds can never serve
(or accidentally tap) a real ad.

android/app/src/main/AndroidManifest.xml

@@ -138,16 +138,14 @@
             android:name="com.google.android.gms.car.application"
             android:resource="@xml/automotive_app_desc" />
 
-        <!--
+        <!-- AdMob application id (iap-freemium-unlock). Real id, provisioned
-            AdMob application id (iap-freemium-unlock).
+             in the AdMob console. Safe to use in all build modes — this id
-            TODO: this is Google's OFFICIAL TEST app id
+             only initializes the SDK; it never serves an ad by itself, so it
-            (ca-app-pub-3940256099942544~3347511713) — swap for the real
+             carries none of the "don't tap your own ads" risk that ad unit
-            AdMob app id once provisioned in the AdMob console. Never ship
+             ids do. -->
-            the test id to production.
-        -->
         <meta-data
             android:name="com.google.android.gms.ads.APPLICATION_ID"
-            android:value="ca-app-pub-3940256099942544~3347511713" />
+            android:value="ca-app-pub-6038935671414339~4085536467" />
     </application>
     <queries>
         <intent>

lib/servicios/servicio_anuncios.dart

@@ -1,15 +1,30 @@
 import 'dart:async';
 
-import 'package:flutter/foundation.dart' show debugPrint;
+import 'package:flutter/foundation.dart' show debugPrint, kReleaseMode;
 import 'package:google_mobile_ads/google_mobile_ads.dart';
 
-/// TODO(ads): official Google TEST ad unit ids — AdMob has not provisioned
+/// Official Google TEST ad unit ids. ALWAYS used outside release builds —
-/// real ones yet (design.md Open Questions). Swap these for the real banner
+/// tapping your own real ad unit during development/testing is invalid
-/// / interstitial unit ids once available; never ship the test ids to
+/// traffic and AdMob suspends accounts for it, so this is not optional.
-/// production.
 const bannerAdUnitIdPrueba = 'ca-app-pub-3940256099942544/6300978111';
 const interstitialAdUnitIdPrueba = 'ca-app-pub-3940256099942544/1033173712';
 
+/// Real banner unit id, provisioned in the AdMob console (iap-freemium-unlock).
+const _bannerAdUnitIdReal = 'ca-app-pub-6038935671414339/5658618378';
+
+/// Real interstitial unit id, provisioned in the AdMob console (iap-freemium-unlock).
+const _interstitialAdUnitIdReal = 'ca-app-pub-6038935671414339/4189478248';
+
+/// Real id in release builds only; test id everywhere else (debug/profile,
+/// including internal-testing-track builds run via `flutter run --release`
+/// on a personal device — see the "never tap your own ads" note above).
+const bannerAdUnitId = kReleaseMode
+    ? _bannerAdUnitIdReal
+    : bannerAdUnitIdPrueba;
+const interstitialAdUnitId = kReleaseMode
+    ? _interstitialAdUnitIdReal
+    : interstitialAdUnitIdPrueba;
+
 /// Ads port + AdMob adapter (Design "Interfaces / Contracts", ADR-6): owns
 /// the entitlement gate for both surfaces, the interstitial's session
 /// frequency cap, and is the ONLY `google_mobile_ads` call site besides
@@ -80,7 +95,7 @@ class ServicioAnuncios {
     try {
       final cargaCompleter = Completer<InterstitialAd?>();
       await InterstitialAd.load(
-        adUnitId: interstitialAdUnitIdPrueba,
+        adUnitId: interstitialAdUnitId,
         request: const AdRequest(),
         adLoadCallback: InterstitialAdLoadCallback(
           onAdLoaded: (ad) {

lib/widgets/banner_anuncio_superior.dart

@@ -40,7 +40,7 @@ class _BannerAnuncioSuperiorState extends State<BannerAnuncioSuperior> {
     // load failure takes in production. Never throws out of this method.
     final anuncio = BannerAd(
       size: AdSize.banner,
-      adUnitId: bannerAdUnitIdPrueba,
+      adUnitId: bannerAdUnitId,
       request: const AdRequest(),
       listener: BannerAdListener(
         onAdLoaded: (ad) {