test: cover android canvas a2ui trust gate

apps/android/app/src/main/java/ai/openclaw/app/node/CanvasActionTrust.kt

@@ -17,17 +17,19 @@ object CanvasActionTrust {
     val normalizedCandidate = normalizeTrustedRemoteA2uiUri(candidateUri) ?: return false
 
     return trustedA2uiUrls.any { trusted ->
-      isTrustedA2uiPage(normalizedCandidate, trusted)
+      matchesTrustedRemoteA2uiUrlExact(normalizedCandidate, trusted)
     }
   }
 
-  private fun isTrustedA2uiPage(candidateUri: URI, trustedUrl: String): Boolean {
+  private fun matchesTrustedRemoteA2uiUrlExact(candidateUri: URI, trustedUrl: String): Boolean {
     val trustedUri = parseUri(trustedUrl) ?: return false
     val normalizedTrusted = normalizeTrustedRemoteA2uiUri(trustedUri) ?: return false
     return candidateUri == normalizedTrusted
   }
 
   private fun normalizeTrustedRemoteA2uiUri(uri: URI): URI? {
+    // Keep Android trust normalization aligned with iOS ScreenController:
+    // exact remote URL match, scheme/host normalized, fragment ignored.
     val scheme = uri.scheme?.lowercase() ?: return null
     if (scheme != "http" && scheme != "https") return null
 

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

@@ -163,7 +163,7 @@ private fun disableForceDarkIfSupported(settings: WebSettings) {
   WebSettingsCompat.setForceDark(settings, WebSettingsCompat.FORCE_DARK_OFF)
 }
 
-private class CanvasA2UIActionBridge(
+internal class CanvasA2UIActionBridge(
   private val isTrustedPage: () -> Boolean,
   private val onMessage: (String) -> Unit,
 ) {

apps/android/app/src/test/java/ai/openclaw/app/ui/CanvasA2UIActionBridgeTest.kt

@@ -0,0 +1,50 @@
+package ai.openclaw.app.ui
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class CanvasA2UIActionBridgeTest {
+  @Test
+  fun forwardsTrimmedPayloadFromTrustedPage() {
+    val forwarded = mutableListOf<String>()
+    val bridge =
+      CanvasA2UIActionBridge(
+        isTrustedPage = { true },
+        onMessage = { forwarded += it },
+      )
+
+    bridge.postMessage("  {\"ok\":true}  ")
+
+    assertEquals(listOf("{\"ok\":true}"), forwarded)
+  }
+
+  @Test
+  fun rejectsPayloadFromUntrustedPage() {
+    val forwarded = mutableListOf<String>()
+    val bridge =
+      CanvasA2UIActionBridge(
+        isTrustedPage = { false },
+        onMessage = { forwarded += it },
+      )
+
+    bridge.postMessage("{\"ok\":true}")
+
+    assertTrue(forwarded.isEmpty())
+  }
+
+  @Test
+  fun rejectsBlankPayloadBeforeForwarding() {
+    val forwarded = mutableListOf<String>()
+    val bridge =
+      CanvasA2UIActionBridge(
+        isTrustedPage = { true },
+        onMessage = { forwarded += it },
+      )
+
+    bridge.postMessage("   ")
+    bridge.postMessage(null)
+
+    assertTrue(forwarded.isEmpty())
+  }
+}