Wire app-side Firebase push notifications

- Rename Android package com.example.frontend -> net.oottsecurity.app
  (namespace, applicationId, MainActivity), and enable core library
  desugaring required by flutter_local_notifications
- Configure Firebase from a committed lib/firebase_options.dart (client
  identifiers, not secrets) instead of native config files; initialize the
  push service with explicit options
- iOS: add Runner.entitlements (aps-environment) wired via CODE_SIGN_ENTITLEMENTS
  for the Runner target, and UIBackgroundModes remote-notification in Info.plist
- gitignore the unused native Firebase config files defensively

dart analyze clean; 145 frontend tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/.gitignore

@@ -43,3 +43,11 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# Firebase native config files. OOTT configures Firebase from the committed
+# lib/firebase_options.dart instead, so these are not used by the build; ignored
+# defensively so a stray download (e.g. from `flutterfire configure`) is not
+# accidentally committed.
+/android/app/google-services.json
+/ios/Runner/GoogleService-Info.plist
+/macos/Runner/GoogleService-Info.plist

frontend/android/app/build.gradle.kts

@@ -6,13 +6,15 @@ plugins {
 }
 
 android {
-    namespace = "com.example.frontend"
+    namespace = "net.oottsecurity.app"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
+        // flutter_local_notifications uses java.time APIs that need desugaring on older Android.
+        isCoreLibraryDesugaringEnabled = true
     }
 
     kotlinOptions {
@@ -20,8 +22,7 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "net.oottsecurity.app"
-        applicationId = "com.example.frontend"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion
@@ -42,3 +43,9 @@ android {
 flutter {
     source = "../.."
 }
+
+dependencies {
+    // Backport of java.time etc. required by flutter_local_notifications (see
+    // isCoreLibraryDesugaringEnabled above).
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
+}

frontend/android/app/src/main/kotlin/net/oottsecurity/app/MainActivity.kt

@@ -1,4 +1,4 @@
-package com.example.frontend
+package net.oottsecurity.app
 
 import io.flutter.embedding.android.FlutterActivity
 

frontend/ios/Runner.xcodeproj/project.pbxproj

@@ -368,6 +368,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				PRODUCT_BUNDLE_IDENTIFIER = "net.oott-security.app";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
@@ -547,6 +548,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				PRODUCT_BUNDLE_IDENTIFIER = "net.oott-security.app";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
@@ -569,6 +571,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
+				CODE_SIGN_ENTITLEMENTS = Runner/Runner.entitlements;
 				PRODUCT_BUNDLE_IDENTIFIER = "net.oott-security.app";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";

frontend/ios/Runner/Info.plist

@@ -56,5 +56,9 @@
 		<false/>
 		<key>ITSAppUsesNonExemptEncryption</key>
 		<false/>
+		<key>UIBackgroundModes</key>
+		<array>
+			<string>remote-notification</string>
+		</array>
 	</dict>
 </plist>

frontend/ios/Runner/Runner.entitlements

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>aps-environment</key>
+	<string>production</string>
+</dict>
+</plist>

frontend/lib/firebase_options.dart

@@ -0,0 +1,52 @@
+// Firebase client configuration for the OOTT app, used by push notifications.
+//
+// These values are client identifiers (project id, sender id, app id, and a
+// client API key). They are not secrets: they ship inside every distributed app
+// binary and are fully extractable. Sending pushes requires the relay's
+// server-side credential (which never leaves Google), and relay abuse is bounded
+// by FCM project scoping + per-IP rate limiting + the billing cap. See
+// push_notifications.md.
+//
+// Mirrors the shape FlutterFire's `flutterfire configure` generates, but only
+// the platforms OOTT delivers push to (Android, iOS) are configured.
+import 'package:firebase_core/firebase_core.dart' show FirebaseOptions;
+import 'package:flutter/foundation.dart'
+    show TargetPlatform, defaultTargetPlatform, kIsWeb;
+
+class DefaultFirebaseOptions {
+  static FirebaseOptions get currentPlatform {
+    if (kIsWeb) {
+      throw UnsupportedError(
+        'Push notifications are not configured for web; this should never be '
+        'called there (see PushService.isSupported).',
+      );
+    }
+    switch (defaultTargetPlatform) {
+      case TargetPlatform.android:
+        return android;
+      case TargetPlatform.iOS:
+        return ios;
+      default:
+        throw UnsupportedError(
+          'DefaultFirebaseOptions are not configured for $defaultTargetPlatform.',
+        );
+    }
+  }
+
+  static const FirebaseOptions android = FirebaseOptions(
+    apiKey: 'AIzaSyD6R22FPkZarDIZymszuzASDCjvIONts1U',
+    appId: '1:607706370042:android:39c9d29bfcdd385cf4de43',
+    messagingSenderId: '607706370042',
+    projectId: 'oott-push',
+    storageBucket: 'oott-push.firebasestorage.app',
+  );
+
+  static const FirebaseOptions ios = FirebaseOptions(
+    apiKey: 'AIzaSyCvDyPJJYW8JLKBdxdlCGsT-Y2nWfv7Gzs',
+    appId: '1:607706370042:ios:43768238f07348f8f4de43',
+    messagingSenderId: '607706370042',
+    projectId: 'oott-push',
+    storageBucket: 'oott-push.firebasestorage.app',
+    iosBundleId: 'net.oott-security.app',
+  );
+}

frontend/lib/utils/push_service.dart

@@ -3,6 +3,7 @@ import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 
+import '../firebase_options.dart';
 import 'oott_api.dart';
 
 /// Per-device push enable/disable, behind an interface so the settings UI can be
@@ -55,10 +56,13 @@ class FirebasePushService implements PushService {
       defaultTargetPlatform == TargetPlatform.iOS ? 'ios' : 'android';
 
   Future<void> _ensureFirebase() async {
-    // No options passed: the native google-services.json / GoogleService-Info
+    // Options come from the committed firebase_options.dart rather than native
-    // .plist added during the one-time project setup provide them.
+    // config files, so no google-services.json / GoogleService-Info.plist is
+    // needed in the build.
     if (Firebase.apps.isEmpty) {
-      await Firebase.initializeApp();
+      await Firebase.initializeApp(
+        options: DefaultFirebaseOptions.currentPlatform,
+      );
     }
   }