feat: add ui.seamColor accent

apps/android/app/src/main/java/com/steipete/clawdis/node/MainViewModel.kt

@@ -24,6 +24,7 @@ class MainViewModel(app: Application) : AndroidViewModel(app) {
   val serverName: StateFlow<String?> = runtime.serverName
   val remoteAddress: StateFlow<String?> = runtime.remoteAddress
   val isForeground: StateFlow<Boolean> = runtime.isForeground
+  val seamColorArgb: StateFlow<Long> = runtime.seamColorArgb
 
   val cameraHud: StateFlow<CameraHudState?> = runtime.cameraHud
   val cameraFlashToken: StateFlow<Long> = runtime.cameraFlashToken

apps/android/app/src/main/java/com/steipete/clawdis/node/NodeRuntime.kt

@@ -120,6 +120,9 @@ class NodeRuntime(context: Context) {
   private val _remoteAddress = MutableStateFlow<String?>(null)
   val remoteAddress: StateFlow<String?> = _remoteAddress.asStateFlow()
 
+  private val _seamColorArgb = MutableStateFlow(DEFAULT_SEAM_COLOR_ARGB)
+  val seamColorArgb: StateFlow<Long> = _seamColorArgb.asStateFlow()
+
   private val _isForeground = MutableStateFlow(true)
   val isForeground: StateFlow<Boolean> = _isForeground.asStateFlow()
 
@@ -133,6 +136,8 @@ class NodeRuntime(context: Context) {
         _serverName.value = name
         _remoteAddress.value = remote
         _isConnected.value = true
+        _seamColorArgb.value = DEFAULT_SEAM_COLOR_ARGB
+        scope.launch { refreshBrandingFromGateway() }
         scope.launch { refreshWakeWordsFromGateway() }
         maybeNavigateToA2uiOnConnect()
       },
@@ -155,6 +160,7 @@ class NodeRuntime(context: Context) {
     _serverName.value = null
     _remoteAddress.value = null
     _isConnected.value = false
+    _seamColorArgb.value = DEFAULT_SEAM_COLOR_ARGB
     chat.onDisconnected(message)
     showLocalCanvasOnDisconnect()
   }
@@ -618,6 +624,21 @@ class NodeRuntime(context: Context) {
     }
   }
 
+  private suspend fun refreshBrandingFromGateway() {
+    if (!_isConnected.value) return
+    try {
+      val res = session.request("config.get", "{}")
+      val root = json.parseToJsonElement(res).asObjectOrNull()
+      val config = root?.get("config").asObjectOrNull()
+      val ui = config?.get("ui").asObjectOrNull()
+      val raw = ui?.get("seamColor").asStringOrNull()?.trim()
+      val parsed = parseHexColorArgb(raw) ?: return
+      _seamColorArgb.value = parsed
+    } catch (_: Throwable) {
+      // ignore
+    }
+  }
+
   private suspend fun handleInvoke(command: String, paramsJson: String?): BridgeSession.InvokeResult {
     if (
       command.startsWith(ClawdisCanvasCommand.NamespacePrefix) ||
@@ -901,6 +922,8 @@ class NodeRuntime(context: Context) {
 
 private data class Quad<A, B, C, D>(val first: A, val second: B, val third: C, val fourth: D)
 
+private const val DEFAULT_SEAM_COLOR_ARGB: Long = 0xFF9EE0FF
+
 private const val a2uiReadyCheckJS: String =
   """
   (() => {
@@ -955,3 +978,12 @@ private fun JsonElement?.asStringOrNull(): String? =
     is JsonPrimitive -> content
     else -> null
   }
+
+private fun parseHexColorArgb(raw: String?): Long? {
+  val trimmed = raw?.trim().orEmpty()
+  if (trimmed.isEmpty()) return null
+  val hex = if (trimmed.startsWith("#")) trimmed.drop(1) else trimmed
+  if (hex.length != 6) return null
+  val rgb = hex.toLongOrNull(16) ?: return null
+  return 0xFF000000L or rgb
+}

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/RootScreen.kt

@@ -57,6 +57,8 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color as ComposeColor
+import androidx.compose.ui.graphics.lerp
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.viewinterop.AndroidView
@@ -81,6 +83,8 @@ fun RootScreen(viewModel: MainViewModel) {
   val isForeground by viewModel.isForeground.collectAsState()
   val voiceWakeStatusText by viewModel.voiceWakeStatusText.collectAsState()
   val talkEnabled by viewModel.talkEnabled.collectAsState()
+  val seamColorArgb by viewModel.seamColorArgb.collectAsState()
+  val seamColor = remember(seamColorArgb) { ComposeColor(seamColorArgb) }
   val audioPermissionLauncher =
     rememberLauncherForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
       if (granted) viewModel.setTalkEnabled(true)
@@ -225,6 +229,14 @@ fun RootScreen(viewModel: MainViewModel) {
       )
 
       // Talk mode gets a dedicated side bubble instead of burying it in settings.
+      val baseOverlay = overlayContainerColor()
+      val talkContainer =
+        lerp(
+          baseOverlay,
+          seamColor.copy(alpha = baseOverlay.alpha),
+          if (talkEnabled) 0.35f else 0.22f,
+        )
+      val talkContent = if (talkEnabled) seamColor else overlayIconColor()
       OverlayIconButton(
         onClick = {
           val next = !talkEnabled
@@ -238,12 +250,12 @@ fun RootScreen(viewModel: MainViewModel) {
             viewModel.setTalkEnabled(false)
           }
         },
+        containerColor = talkContainer,
+        contentColor = talkContent,
         icon = {
-          val tint = if (talkEnabled) MaterialTheme.colorScheme.primary else LocalContentColor.current
           Icon(
             Icons.Default.RecordVoiceOver,
             contentDescription = "Talk Mode",
-            tint = tint,
           )
         },
       )
@@ -278,14 +290,16 @@ private enum class Sheet {
 private fun OverlayIconButton(
   onClick: () -> Unit,
   icon: @Composable () -> Unit,
+  containerColor: ComposeColor? = null,
+  contentColor: ComposeColor? = null,
 ) {
   FilledTonalIconButton(
     onClick = onClick,
     modifier = Modifier.size(44.dp),
     colors =
       IconButtonDefaults.filledTonalIconButtonColors(
-        containerColor = overlayContainerColor(),
-        contentColor = overlayIconColor(),
+        containerColor = containerColor ?: overlayContainerColor(),
+        contentColor = contentColor ?: overlayIconColor(),
       ),
   ) {
     icon()