Allow Gradle desktop builds when Android signing keys are absent.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/android/build.gradle.kts

@@ -70,9 +70,14 @@ extensions.configure<ApplicationExtension> {
         }
     }
 
+    val keystorePropertiesFile = file("keys/keystore.properties")
+    val hasReleaseKeystore = keystorePropertiesFile.isFile && file("keys/release.jks").isFile
+    val hasDebugKeystore = keystorePropertiesFile.isFile && file("keys/debug.jks").isFile
+
     signingConfigs {
+        if (hasReleaseKeystore || hasDebugKeystore) {
             val keystoreProperties = Properties().apply {
-            load(file("keys/keystore.properties").inputStream())
+                load(keystorePropertiesFile.inputStream())
             }
 
             fun Properties.password(key: String): String {
@@ -81,6 +86,7 @@ extensions.configure<ApplicationExtension> {
                 return raw.trim().removeSurrounding("\"").removeSurrounding("'")
             }
 
+            if (hasReleaseKeystore) {
                 create("release") {
                     storeFile = file("keys/release.jks")
                     keyAlias = "key0"
@@ -88,7 +94,9 @@ extensions.configure<ApplicationExtension> {
                     keyPassword = keystoreProperties.password("releaseKeyPassword")
                     enableV3Signing = true
                 }
+            }
 
+            if (hasDebugKeystore) {
                 getByName("debug") {
                     storeFile = file("keys/debug.jks")
                     keyAlias = "key0"
@@ -97,18 +105,24 @@ extensions.configure<ApplicationExtension> {
                     enableV3Signing = true
                 }
             }
+        }
+    }
 
     buildTypes {
         debug {
             applicationIdSuffix = ".beta"
             versionNameSuffix = "-beta"
+            if (hasDebugKeystore) {
                 signingConfig = signingConfigs.getByName("debug")
             }
+        }
 
         release {
             isMinifyEnabled = true
             isShrinkResources = true
+            if (hasReleaseKeystore) {
                 signingConfig = signingConfigs.getByName("release")
+            }
 
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),