Integrate the real LUI Kotlin backend (KotlinHost)

android/app/build.gradle.kts

@@ -117,21 +117,10 @@ tasks.named("preBuild") {
 
 
 
-// When the vendored :lui module is used (no ../lui/platform/android
-// composite build), resolve the dev.lui:lui coordinate to it.
-if (rootProject.findProject(":lui") != null) {
-    configurations.all {
-        resolutionStrategy.dependencySubstitution {
-            substitute(module("dev.lui:lui")).using(project(":lui"))
-        }
-    }
-}
-
 dependencies {
-    // Resolved to ../lui/platform/android when the Kotlin LUI backend
-    // checkout is present (composite build substitution), otherwise to
-    // the vendored :lui module — see settings.gradle.kts.
-    implementation("dev.lui:lui")
+    // The real Kotlin LUI backend, included from
+    // ../lui/platform/android/lui — see settings.gradle.kts.
+    implementation(project(":lui"))
 
     implementation(platform("androidx.compose:compose-bom:2025.09.00"))
     implementation("androidx.compose.ui:ui")

android/app/src/main/kotlin/com/logseq/chat/runtime/LogseqChatNativeBridge.kt

@@ -34,13 +34,12 @@ internal class LogseqChatNativeBridge(
         if (patch.isNotEmpty()) onPatch(patch)
     }
 
-    // platform 3 = AndroidOS, host 3 = the Android host slot the core
-    // renders for (the legacy Android host kind in
-    // shared/src/logseq_chat/native_bridge.ml; the Kotlin backend takes
-    // over that host profile).
+    // platform 3 = AndroidOS, host 4 = KotlinHost (see the host-code table
+    // in shared/src/logseq_chat/native_bridge.ml, matching lui's
+    // components_bridge.ml).
     fun initialize(
         platformCode: Int = 3,
-        hostCode: Int = 3,
+        hostCode: Int = 4,
         authenticationCode: Int = 1,
     ): Long {
         apply(decode(NativeCore.luiInitialize(platformCode, hostCode, authenticationCode)))

android/app/src/main/kotlin/com/logseq/chat/runtime/LuiDispatch.kt

@@ -28,6 +28,20 @@ internal fun dispatchLuiEvent(event: LuiEvent, native: LogseqChatNativeBridge) {
             extensionText(event.values),
             extensionValue(event.values),
         )
+        // The chat core ABI exports no pointer-level, context-menu,
+        // press-modifier, or load entries (see
+        // shared/native/logseq_chat_core_ffi.h), so these events are
+        // dropped here — matching the upstream dispatchToBridge's
+        // treatment of events with no mobile export.
+        is LuiEvent.PressModifiers,
+        is LuiEvent.PressDetail,
+        is LuiEvent.PointerDown,
+        is LuiEvent.PointerUp,
+        is LuiEvent.PointerEnter,
+        is LuiEvent.PointerLeave,
+        is LuiEvent.ContextMenuPress,
+        is LuiEvent.Load,
+        -> Unit
     }
 }
 

android/app/src/main/kotlin/com/logseq/chat/ui/extensions/ChatExtensions.kt

@@ -26,13 +26,16 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.unit.dp
 import dev.lui.LuiExtensionContext
+import dev.lui.LuiExtensionEventSchema
+import dev.lui.LuiExtensionProperty
 import dev.lui.LuiExtensionRegistry
+import dev.lui.LuiExtensionValueKind
 
 // Port of the former logseq_chat_extensions.dart — the chat-specific
 // extension hosts. Fingerprints are generated by the OCaml core and must
 // match byte-for-byte.
 private const val EDITOR_FINGERPRINT =
-    "lui-extension-v1|15:outliner-editor|profiles:android/flutter," +
+    "lui-extension-v1|15:outliner-editor|profiles:android/kotlin," +
         "ios/swiftui|standard-children:0|children:|" +
         "properties:18:caret-utf16-offset:int:required:none,5:title:string:" +
         "required:none,8:block-id:string:required:none|events:11:text-change[" +
@@ -41,7 +44,7 @@ private const val EDITOR_FINGERPRINT =
         "required,5:title:string:required],9:backspace[16:selection-length:int:" +
         "required,5:title:string:required]"
 private const val RICH_FINGERPRINT =
-    "lui-extension-v1|22:outliner-block-content|profiles:android/flutter," +
+    "lui-extension-v1|22:outliner-block-content|profiles:android/kotlin," +
         "ios/swiftui|standard-children:0|children:|" +
         "properties:10:asset-type:string:required:none,10:local-path:string:" +
         "required:none,11:markup-json:string:required:none,12:is-completed:bool:" +
@@ -51,14 +54,14 @@ private const val RICH_FINGERPRINT =
         "9:placement:string:required],4:edit[4:uuid:string:required],9:open-node[" +
         "4:uuid:string:required]"
 private const val NAVIGATION_FINGERPRINT =
-    "lui-extension-v1|23:native-navigation-stack|profiles:android/flutter," +
+    "lui-extension-v1|23:native-navigation-stack|profiles:android/kotlin," +
         "ios/swiftui|standard-children:1|children:|" +
         "properties:26:composer-dismissal-enabled:bool:required:none," +
         "28:bottom-occupies-layout-space:bool:required:none,5:depth:int:required:none," +
         "5:title:string:required:none|events:16:dismiss-composer[],4:back[" +
         "5:count:int:required]"
 private const val SEARCH_FINGERPRINT =
-    "lui-extension-v1|26:native-search-presentation|profiles:android/flutter," +
+    "lui-extension-v1|26:native-search-presentation|profiles:android/kotlin," +
         "ios/swiftui|standard-children:1|children:|" +
         "properties:5:depth:int:required:none,5:query:string:required:none," +
         "5:title:string:required:none,9:presented:bool:required:none|events:" +
@@ -68,17 +71,127 @@ private const val SEARCH_FINGERPRINT =
 fun logseqChatExtensionRegistry(
     resolveAssetPath: (String) -> String = { it },
 ): LuiExtensionRegistry = LuiExtensionRegistry().apply {
-    register("outliner-editor", EDITOR_FINGERPRINT) { context ->
-        OutlinerEditor(context)
+    register(
+        "outliner-editor",
+        EDITOR_FINGERPRINT,
+        properties = listOf(
+            LuiExtensionProperty("caret-utf16-offset", LuiExtensionValueKind.INTEGER),
+            LuiExtensionProperty("title", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("block-id", LuiExtensionValueKind.STRING),
+        ),
+        events = listOf(
+            LuiExtensionEventSchema(
+                "text-change",
+                listOf(
+                    LuiExtensionProperty("caret-utf16-offset", LuiExtensionValueKind.INTEGER, required = true),
+                    LuiExtensionProperty("title", LuiExtensionValueKind.STRING, required = true),
+                ),
+            ),
+            LuiExtensionEventSchema(
+                "caret-change",
+                listOf(
+                    LuiExtensionProperty("caret-utf16-offset", LuiExtensionValueKind.INTEGER, required = true),
+                ),
+            ),
+            LuiExtensionEventSchema(
+                "return",
+                listOf(
+                    LuiExtensionProperty("caret-utf16-offset", LuiExtensionValueKind.INTEGER, required = true),
+                    LuiExtensionProperty("title", LuiExtensionValueKind.STRING, required = true),
+                ),
+            ),
+            LuiExtensionEventSchema(
+                "backspace",
+                listOf(
+                    LuiExtensionProperty("selection-length", LuiExtensionValueKind.INTEGER, required = true),
+                    LuiExtensionProperty("caret-utf16-offset", LuiExtensionValueKind.INTEGER, required = true),
+                    LuiExtensionProperty("title", LuiExtensionValueKind.STRING, required = true),
+                ),
+            ),
+        ),
+    ) {
+        OutlinerEditor(this)
     }
-    register("outliner-block-content", RICH_FINGERPRINT) { context ->
-        OutlinerBlockContent(context, resolveAssetPath)
+    register(
+        "outliner-block-content",
+        RICH_FINGERPRINT,
+        properties = listOf(
+            LuiExtensionProperty("asset-type", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("local-path", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("markup-json", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("is-completed", LuiExtensionValueKind.BOOLEAN),
+            LuiExtensionProperty("youtube-target-url", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("title", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("block-id", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("is-asset", LuiExtensionValueKind.BOOLEAN),
+        ),
+        events = listOf(
+            LuiExtensionEventSchema(
+                "drag-start",
+                listOf(LuiExtensionProperty("uuid", LuiExtensionValueKind.STRING, required = true)),
+            ),
+            LuiExtensionEventSchema(
+                "drop",
+                listOf(
+                    LuiExtensionProperty("uuid", LuiExtensionValueKind.STRING, required = true),
+                    LuiExtensionProperty("placement", LuiExtensionValueKind.STRING, required = true),
+                ),
+            ),
+            LuiExtensionEventSchema(
+                "edit",
+                listOf(LuiExtensionProperty("uuid", LuiExtensionValueKind.STRING, required = true)),
+            ),
+            LuiExtensionEventSchema(
+                "open-node",
+                listOf(LuiExtensionProperty("uuid", LuiExtensionValueKind.STRING, required = true)),
+            ),
+        ),
+    ) {
+        OutlinerBlockContent(this, resolveAssetPath)
     }
-    register("native-navigation-stack", NAVIGATION_FINGERPRINT) { context ->
-        NavigationBoundary(context)
+    register(
+        "native-navigation-stack",
+        NAVIGATION_FINGERPRINT,
+        acceptsStandardChildren = true,
+        properties = listOf(
+            LuiExtensionProperty("composer-dismissal-enabled", LuiExtensionValueKind.BOOLEAN),
+            LuiExtensionProperty("bottom-occupies-layout-space", LuiExtensionValueKind.BOOLEAN),
+            LuiExtensionProperty("depth", LuiExtensionValueKind.INTEGER),
+            LuiExtensionProperty("title", LuiExtensionValueKind.STRING),
+        ),
+        events = listOf(
+            LuiExtensionEventSchema("dismiss-composer"),
+            LuiExtensionEventSchema(
+                "back",
+                listOf(LuiExtensionProperty("count", LuiExtensionValueKind.INTEGER, required = true)),
+            ),
+        ),
+    ) {
+        NavigationBoundary(this)
     }
-    register("native-search-presentation", SEARCH_FINGERPRINT) { context ->
-        SearchPresentation(context)
+    register(
+        "native-search-presentation",
+        SEARCH_FINGERPRINT,
+        acceptsStandardChildren = true,
+        properties = listOf(
+            LuiExtensionProperty("depth", LuiExtensionValueKind.INTEGER),
+            LuiExtensionProperty("query", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("title", LuiExtensionValueKind.STRING),
+            LuiExtensionProperty("presented", LuiExtensionValueKind.BOOLEAN),
+        ),
+        events = listOf(
+            LuiExtensionEventSchema(
+                "query-changed",
+                listOf(LuiExtensionProperty("query", LuiExtensionValueKind.STRING, required = true)),
+            ),
+            LuiExtensionEventSchema(
+                "back",
+                listOf(LuiExtensionProperty("count", LuiExtensionValueKind.INTEGER, required = true)),
+            ),
+            LuiExtensionEventSchema("dismiss"),
+        ),
+    ) {
+        SearchPresentation(this)
     }
 }
 

android/build.gradle.kts

@@ -3,3 +3,11 @@ plugins {
     id("com.android.library") version "9.1.0" apply false
     id("org.jetbrains.kotlin.plugin.compose") version "2.4.0" apply false
 }
+
+// :lui is the real LUI Kotlin backend included from ../lui/platform/android.
+// Its own test suite (paparazzi screenshot tests) needs the standalone
+// platform/android build — disable it here so ./gradlew test only runs
+// the app's tests.
+project(":lui").tasks.withType<Test>().configureEach {
+    enabled = false
+}