fix: mobile entry point cfg_attr + java sdk versions

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

@@ -24,7 +24,7 @@ android {
     defaultConfig {
         manifestPlaceholders["usesCleartextTraffic"] = "false"
         applicationId = "com.haystack.app"
-        minSdk = 21
+        minSdk = 24
         targetSdk = 34
         versionCode = tauriProperties.getProperty("tauri.android.versionCode", "1").toInt()
         versionName = tauriProperties.getProperty("tauri.android.versionName", "1.0")

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-21-openjdk
+# org.gradle.java.home=/usr/lib/jvm/java-21-openjdk

frontend/src-tauri/src/lib.rs

@@ -42,6 +42,7 @@ pub fn desktop() {
         .expect("error while running tauri application");
 }
 
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
 #[cfg(any(target_os = "ios", target_os = "android"))]
 pub fn android() {
     tauri::Builder::default()