android: toolchain AGP 9.1.1 / Gradle 9.3.1 / Kotlin 2.2.21 / compileSdk 37, BOM 2026.09.00 + material3 1.5.0-beta01

Built-in Kotlin (kotlin-android removed), Java 11 compile options (compose 1.12),
proguard-android-optimize.txt (the non-optimize file is rejected by AGP 9),
ExposedDropdownMenu import, minSdk 23 kept via tools:overrideLibrary for
material3 1.5 libs that declare minSdk 24. -PshortNdkCommands for deep worktree paths.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/frontends/android/app/build.gradle

@@ -1,5 +1,4 @@
 apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
 apply plugin: 'org.jetbrains.kotlin.plugin.compose'
 
 /* Optional .env next to this project: S3/update settings and signing (see .env.example).
@@ -42,9 +41,9 @@ android {
 
     defaultConfig {
         applicationId "one.shx.strongswan.ext"
-        compileSdk = 36
-        minSdkVersion 23
-        targetSdkVersion 36
+        compileSdk = 37
+        minSdk = 23
+        targetSdk = 36
 
         versionCode 159
         versionName "2.14.6"
@@ -78,6 +77,10 @@ android {
         externalNativeBuild {
             ndkBuild {
                 arguments '-j' + Runtime.runtime.availableProcessors()
+                /* deep checkout paths (e.g. git worktrees) overflow the Windows command line; opt in with -PshortNdkCommands */
+                if (project.hasProperty('shortNdkCommands')) {
+                    arguments 'APP_SHORT_COMMANDS=true', 'LOCAL_SHORT_COMMANDS=true'
+                }
                 abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86_64'
             }
         }
@@ -114,7 +117,7 @@ android {
                Smoke-test a release build on a device before publishing. */
             minifyEnabled true
             shrinkResources true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.txt'
             if (keystoreFile) {
                 signingConfig signingConfigs.release
             } else {
@@ -131,11 +134,8 @@ android {
         }
     }
     compileOptions {
-        targetCompatibility 1.8
-        sourceCompatibility 1.8
-    }
-    kotlinOptions {
-        jvmTarget = '1.8'
+        targetCompatibility JavaVersion.VERSION_11
+        sourceCompatibility JavaVersion.VERSION_11
     }
     buildFeatures {
         compose true
@@ -158,15 +158,15 @@ dependencies {
     /* BOM 2026.06.01 = compose-ui 1.11.4. The Expressive API (MaterialExpressiveTheme,
        MotionScheme.expressive, LoadingIndicator, MaterialShapes) lives only in
        material3 1.5.0-alpha/beta, so material3 is pinned explicitly.
-       1.5.0-alpha18 is the newest line that still builds with AGP 8.13 / compileSdk 36:
+       1.5.0-beta01 is the newest line that still builds with AGP 8.13 / compileSdk 36:
        alpha19+ (and 1.5.0-beta01, BOM 2026.09.00 = compose 1.12) require AGP 9.1 and
        compileSdk 37. Unpin once those are adopted and 1.5.0 is stable. */
-    def composeBom = platform('androidx.compose:compose-bom:2026.06.01')
+    def composeBom = platform('androidx.compose:compose-bom:2026.09.00')
     implementation composeBom
     implementation 'androidx.compose.ui:ui'
-    implementation 'androidx.compose.material3:material3:1.5.0-alpha18'
+    implementation 'androidx.compose.material3:material3:1.5.0-beta01'
     /* adaptive-navigation-suite (NavigationSuiteScaffold) requires minSdk 23 */
-    implementation 'androidx.compose.material3:material3-adaptive-navigation-suite:1.5.0-alpha18'
+    implementation 'androidx.compose.material3:material3-adaptive-navigation-suite:1.5.0-beta01'
     implementation 'androidx.compose.material:material-icons-extended'
     implementation 'androidx.activity:activity-compose:1.11.0'