fix(android): disable AGP new-DSL mode to fix signReleaseBundle NullPointerException

AGP 9+ defaults to new-DSL-only mode, which causes a NullPointerException
when conditionally creating signingConfigs inside the android {} block.
Setting android.newDsl=false restores the previous evaluation behaviour.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/ci.yml

@@ -97,7 +97,7 @@ jobs:
           ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
           PLAY_STORE_CONFIG_JSON: ${{ secrets.PLAY_STORE_CONFIG_JSON }}
         run: |
-          nix develop --no-warn-dirty --command dagger call --progress=plain -m ci publish-android --source . --play-store-config env:PLAY_STORE_CONFIG_JSON
+          nix develop --no-warn-dirty --command dagger call --progress=plain -m ci publish-android --source . --play-store-config env:PLAY_STORE_CONFIG_JSON --keystore-password env:ANDROID_KEYSTORE_PASSWORD
 
       - name: Build & Deploy APK to server
         continue-on-error: true
@@ -108,7 +108,7 @@ jobs:
           ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
         run: |
           HASH=$(git rev-parse --short HEAD)
-          nix develop --no-warn-dirty --command dagger call --progress=plain -m ci deploy-apk --source . --ssh-key env:SSH_PRIVATE_KEY --ssh-user "$SSH_USER" --ssh-host "$SSH_HOST" --commit-hash "$HASH"
+          nix develop --no-warn-dirty --command dagger call --progress=plain -m ci deploy-apk --source . --ssh-key env:SSH_PRIVATE_KEY --ssh-user "$SSH_USER" --ssh-host "$SSH_HOST" --commit-hash "$HASH" --keystore-password env:ANDROID_KEYSTORE_PASSWORD
 
   publish-website:
     name: Publish Website Build History

android/app/build.gradle.kts

@@ -20,15 +20,18 @@ android {
         jvmTarget = JavaVersion.VERSION_17.toString()
     }
 
-    signingConfigs {
-        create("release") {
-            // Hardcoded alias matching t.sh
-            keyAlias = "upload"
-            // Use the same password for both key and keystore
-            val pass = System.getenv("ANDROID_KEYSTORE_PASSWORD")
-            storePassword = pass
-            keyPassword = pass
-            storeFile = file("upload-keystore.jks")
+    val keystoreFile = file("upload-keystore.jks")
+    val keystorePass: String? = System.getenv("ANDROID_KEYSTORE_PASSWORD")
+    val hasKeystore = keystoreFile.exists() && keystorePass != null
+
+    if (hasKeystore) {
+        signingConfigs {
+            create("release") {
+                keyAlias = "upload"
+                storePassword = keystorePass
+                keyPassword = keystorePass
+                storeFile = keystoreFile
+            }
         }
     }
 
@@ -44,9 +47,7 @@ android {
 
     buildTypes {
         release {
-            // Use the signing config defined above for release builds.
-            // If the keystore file exists (e.g. in CI or manually placed), sign it.
-            signingConfig = if (signingConfigs.getByName("release").storeFile?.exists() == true) {
+            signingConfig = if (hasKeystore) {
                 signingConfigs.getByName("release")
             } else {
                 signingConfigs.getByName("debug")

android/gradle.properties

@@ -1,2 +1,3 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
+android.newDsl=false

ci/main.go

@@ -262,8 +262,9 @@ func (m *Ci) DeployLinux(
 }
 
 // Build and return the Android APK
-func (m *Ci) BuildAndroidApk(source *dagger.Directory) *dagger.File {
+func (m *Ci) BuildAndroidApk(source *dagger.Directory, keystorePassword *dagger.Secret) *dagger.File {
 	return m.Setup(source).
+		WithSecretVariable("ANDROID_KEYSTORE_PASSWORD", keystorePassword).
 		WithExec([]string{"flutter", "build", "apk", "--release"}).
 		File("build/app/outputs/flutter-apk/app-release.apk")
 }
@@ -276,9 +277,10 @@ func (m *Ci) DeployApk(
 	sshUser string,
 	sshHost string,
 	commitHash string,
+	keystorePassword *dagger.Secret,
 ) (string, error) {
 	// 1. Build the APK
-	apk := m.BuildAndroidApk(source)
+	apk := m.BuildAndroidApk(source, keystorePassword)
 
 	// 2. Deploy
 	datePath := time.Now().Format("2006/01/02")
@@ -293,8 +295,9 @@ func (m *Ci) DeployApk(
 }
 
 // Build and return the Android App Bundle (AAB)
-func (m *Ci) BuildAndroidRelease(source *dagger.Directory) *dagger.File {
+func (m *Ci) BuildAndroidRelease(source *dagger.Directory, keystorePassword *dagger.Secret) *dagger.File {
 	return m.Setup(source).
+		WithSecretVariable("ANDROID_KEYSTORE_PASSWORD", keystorePassword).
 		WithExec([]string{"flutter", "build", "appbundle", "--release"}).
 		File("build/app/outputs/bundle/release/app-release.aab")
 }
@@ -304,9 +307,10 @@ func (m *Ci) PublishAndroid(
 	ctx context.Context,
 	source *dagger.Directory,
 	playStoreConfig *dagger.Secret,
+	keystorePassword *dagger.Secret,
 ) (string, error) {
 	// 1. Build the AAB
-	aab := m.BuildAndroidRelease(source)
+	aab := m.BuildAndroidRelease(source, keystorePassword)
 
 	// 2. Prepare script source
 	scriptSource := source.Filter(dagger.DirectoryFilterOpts{