wip: sorting out various versioning problems

frontend/src-tauri/gen/android/app/build.gradle.kts

@@ -1,4 +1,9 @@
 import java.util.Properties
+import java.io.FileInputStream
+
+val keyPropertiesFile = rootProject.file("key.properties")
+val keyProperties = Properties()
+keyProperties.load(FileInputStream(keyPropertiesFile))
 
 plugins {
     id("com.android.application")
@@ -24,6 +29,14 @@ android {
         versionCode = tauriProperties.getProperty("tauri.android.versionCode", "1").toInt()
         versionName = tauriProperties.getProperty("tauri.android.versionName", "1.0")
     }
+    signingConfigs {
+       create("release") {
+           keyAlias = keyProperties["keyAlias"] as String
+           keyPassword = keyProperties["keyPassword"] as String
+           storeFile = file(keyProperties["storeFile"] as String)
+           storePassword = keyProperties["storePassword"] as String
+       }
+    }
     buildTypes {
         getByName("debug") {
             manifestPlaceholders["usesCleartextTraffic"] = "true"
@@ -43,6 +56,7 @@ android {
                     .plus(getDefaultProguardFile("proguard-android-optimize.txt"))
                     .toList().toTypedArray()
             )
+            signingConfig = signingConfigs.getByName("release")
         }
     }
     kotlinOptions {

frontend/src-tauri/gen/android/gradle.properties

@@ -22,4 +22,4 @@ kotlin.code.style=official
 # thereby reducing the size of the R class for that library
 android.nonTransitiveRClass=true
 android.nonFinalResIds=false
-org.gradle.java.home=/usr/lib/jvm/java-17-openjdk-amd64
+org.gradle.java.home=/usr/lib/jvm/java-24-openjdk