refactor(android): remove stale canvas and overlay helpers

apps/android/app/src/main/java/ai/openclaw/app/gateway/GatewaySession.kt

@@ -279,28 +279,6 @@ class GatewaySession(
     }
   }
 
-  private suspend fun refreshPluginSurfaceUrl(
-    method: String,
-    params: JsonElement?,
-    timeoutMs: Long,
-  ): String? {
-    val conn = currentConnection ?: return null
-    return try {
-      val res = conn.request(method, params, timeoutMs)
-      if (!res.ok) return null
-      val obj = res.payloadJson?.let { json.parseToJsonElement(it).asObjectOrNull() } ?: return null
-      val raw =
-        obj["pluginSurfaceUrls"]
-          .asObjectOrNull()
-          ?.get("canvas")
-          .asStringOrNull()
-      normalizeCanvasHostUrl(raw, conn.endpoint, isTlsConnection = conn.tls != null)
-    } catch (err: Throwable) {
-      Log.d("OpenClawGateway", "$method failed: ${err.message ?: err::class.java.simpleName}")
-      null
-    }
-  }
-
   /** Sends node.event and preserves the gateway RPC error shape for callers that need diagnostics. */
   suspend fun sendNodeEventDetailed(
     event: String,

apps/android/app/src/main/java/ai/openclaw/app/ui/OpenClawTheme.kt

@@ -9,14 +9,10 @@ import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.SideEffect
-import androidx.compose.runtime.staticCompositionLocalOf
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalView
 import androidx.core.view.WindowCompat
 
-private val LocalOpenClawDarkTheme = staticCompositionLocalOf { true }
-
 /**
  * App theme wrapper that installs dynamic Material colors and legacy mobile color tokens.
  */
@@ -34,7 +30,6 @@ fun OpenClawTheme(
 
   CompositionLocalProvider(
     LocalMobileColors provides mobileColors,
-    LocalOpenClawDarkTheme provides isDark,
   ) {
     MaterialTheme(colorScheme = colorScheme, content = content)
   }
@@ -55,15 +50,3 @@ internal fun OpenClawSystemBarAppearance(lightAppearance: Boolean) {
     }
   }
 }
-
-/**
- * Overlay background token tuned for panels floating over the mobile canvas.
- */
-@Composable
-fun overlayContainerColor(): Color {
-  val scheme = MaterialTheme.colorScheme
-  val isDark = LocalOpenClawDarkTheme.current
-  val base = if (isDark) scheme.surfaceContainerLow else scheme.surfaceContainerHigh
-  // Light mode keeps overlays away from pure-white glare on the app canvas.
-  return if (isDark) base else base.copy(alpha = 0.88f)
-}