some build stuff and quick fix

android/app/build.gradle.kts

@@ -1,12 +1,12 @@
 plugins {
     id("com.android.application")
-    id("kotlin-android")
+    id("org.jetbrains.kotlin.android")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }
 
 android {
-    namespace = "com.example.untitled1"
+    namespace = "com.crylia.hirameki"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -20,17 +20,31 @@ android {
     }
 
     defaultConfig {
-        applicationId = "com.crylia.wanikani_kanji_srs"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        applicationId = "com.crylia.hirameki_srs"
         minSdk = flutter.minSdkVersion
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
     }
 
+    signingConfigs {
+        create("release") {
+            storeFile = file("hirameki-release-key.jks")
+            storePassword = project.findProperty("KEYSTORE_PASSWORD")?.toString()
+            keyAlias = project.findProperty("KEY_ALIAS")?.toString()
+            keyPassword = project.findProperty("KEY_PASSWORD")?.toString()
+        }
+    }
+
     buildTypes {
-        release {
+        getByName("release") {
+            signingConfig = signingConfigs.getByName("release")
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
         }
     }
 }

android/app/src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.INTERNET" />
     <application
-        android:label="Hirameki SRS">
+        android:label="Hirameki SRS"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity

android/build.gradle.kts

@@ -1,3 +1,11 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+plugins {
+    // Ensure these match your Flutter Gradle plugin requirements
+    id("com.android.application") version "8.9.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.1.0" apply false
+}
+
 allprojects {
     repositories {
         google()
@@ -5,18 +13,17 @@ allprojects {
     }
 }
 
-val newBuildDir: Directory =
-    rootProject.layout.buildDirectory
-        .dir("../../build")
-        .get()
-rootProject.layout.buildDirectory.value(newBuildDir)
+// Optional: custom build directory (keep this if you really need a shared build folder)
+val newBuildDir = rootProject.layout.buildDirectory.dir("../../build").get()
+rootProject.layout.buildDirectory.set(newBuildDir)
 
 subprojects {
-    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
-    project.layout.buildDirectory.value(newSubprojectBuildDir)
+    val newSubprojectBuildDir = newBuildDir.dir(name)
+    layout.buildDirectory.set(newSubprojectBuildDir)
 }
+
 subprojects {
-    project.evaluationDependsOn(":app")
+    evaluationDependsOn(":app")
 }
 
 tasks.register<Delete>("clean") {