some backend fixes and add android app

android/settings.gradle.kts

@@ -0,0 +1,52 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "kadence-android"
+
+// `core` is plain Kotlin on the JVM: the matchers, the policy clock, the outbox
+// reconciliation, the Glyph frame and the formatting. No Android, no device, no SDK —
+// which is the whole point. `./gradlew :core:test` runs the logic suite on a machine
+// that has nothing but a JDK, so almost none of this app needs a phone to verify.
+include(":core")
+
+// `app` is the Android client and genuinely needs an SDK. Including it
+// unconditionally would make every Gradle invocation fail on a machine without one,
+// taking `:core:test` down with it — so it joins the build only when an SDK exists.
+val androidSdk: java.io.File? = sequenceOf(
+    System.getenv("ANDROID_HOME"),
+    System.getenv("ANDROID_SDK_ROOT"),
+    file("local.properties")
+        .takeIf { it.isFile }
+        ?.readLines()
+        ?.firstOrNull { it.startsWith("sdk.dir=") }
+        ?.substringAfter('=')
+        ?.trim(),
+).filterNotNull()
+    .filter { it.isNotBlank() }
+    .map { file(it) }
+    .firstOrNull { it.isDirectory }
+
+val appModule = file("app/build.gradle.kts")
+
+if (androidSdk != null && appModule.isFile) {
+    include(":app")
+} else if (androidSdk != null) {
+    logger.lifecycle("SDK found, but app/ is not built out yet — :app excluded.")
+} else {
+    logger.lifecycle(
+        "Android SDK not found (set ANDROID_HOME or local.properties' sdk.dir) — " +
+            ":app is excluded from this build. :core still compiles and tests.",
+    )
+}