update notification

android/app/build.gradle.kts

@@ -3,6 +3,7 @@ plugins {
     id("kotlin-android")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
+    id("com.google.gms.google-services")
 }
 
 android {
@@ -11,6 +12,7 @@ android {
     ndkVersion = "27.0.12077973"
 
     compileOptions {
+        isCoreLibraryDesugaringEnabled = true
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
     }
@@ -24,7 +26,7 @@ android {
         applicationId = "com.apskel.enaklo_owner"
         // 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
+        minSdk = 21
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
@@ -42,3 +44,7 @@ android {
 flutter {
     source = "../.."
 }
+
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
+}

android/app/src/main/AndroidManifest.xml

@@ -7,6 +7,10 @@
     <uses-permission android:name="android.permission.READ_MEDIA_AUDIO"/>
     <!-- FCM: required for POST_NOTIFICATIONS on Android 13+ -->
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+    <!-- FCM: allow background processing after device reboot -->
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <!-- FCM: allow wake lock for background message processing -->
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
     
     <application
         android:label="Enaklo Owner"
@@ -48,7 +52,21 @@
         <!-- FCM: default notification icon -->
         <meta-data
             android:name="com.google.firebase.messaging.default_notification_icon"
-            android:resource="@mipmap/launcher_icon" />
+            android:resource="@drawable/ic_notification" />
+
+        <!-- FCM: default notification color -->
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_color"
+            android:resource="@color/notification_color" />
+
+        <!-- FCM: background message handler service -->
+        <service
+            android:name="com.google.firebase.messaging.FirebaseMessagingService"
+            android:exported="false">
+            <intent-filter android:priority="-500">
+                <action android:name="com.google.firebase.MESSAGING_EVENT"/>
+            </intent-filter>
+        </service>
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and

android/app/src/main/res/values/colors.xml

@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <color name="ic_launcher_background">#ffffff</color>
+    <!-- FCM: notification accent color -->
+    <color name="notification_color">#FF6B35</color>
 </resources>

android/settings.gradle.kts

@@ -20,6 +20,7 @@ plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
     id("com.android.application") version "8.7.3" apply false
     id("org.jetbrains.kotlin.android") version "2.1.0" apply false
+    id("com.google.gms.google-services") version "4.4.2" apply false
 }
 
 include(":app")