Android: fix incomplete JS string escaping in A2UI action status (#43784)

* Android: fix incomplete JS string escaping in A2UI action status

* escape U+2028/U+2029 Unicode line terminators in JS strings

* refactor(android): serialize A2UI action status strings

* fix: serialize Android A2UI action status strings (#43784) (thanks @Kaneki-x)

---------

Co-authored-by: Ayaan Zaidi <hi@obviy.us>

CHANGELOG.md

@@ -118,6 +118,7 @@ Docs: https://docs.openclaw.ai
 - WhatsApp/reconnect: restore the append recency filter in the extension inbox monitor and handle protobuf `Long` timestamps correctly, so fresh post-reconnect append messages are processed while stale history sync stays suppressed. (#42588) Thanks @MonkeyLeeT.
 - WhatsApp/login: wait for pending creds writes before reopening after Baileys `515` pairing restarts in both QR login and `channels login` flows, and keep the restart coverage pinned to the real wrapped error shape plus per-account creds queues. (#27910) Thanks @asyncjason.
 - Telegram/message send: forward `--force-document` through the `sendPayload` path as well as `sendMedia`, so Telegram payload sends with `channelData` keep uploading images as documents instead of silently falling back to compressed photo sends. (#47119) Thanks @thepagent.
+- Android/canvas: serialize A2UI action-status event strings before evaluating WebView JS, so action ids and multiline errors do not break the callback dispatch. (#43784) Thanks @Kaneki-x.
 - Telegram/message chunking: preserve spaces, paragraph separators, and word boundaries when HTML overflow rechunking splits formatted replies. (#47274) Thanks @obviyus.
 - Z.AI/onboarding: detect a working default model even for explicit `zai-coding-*` endpoint choices, so Coding Plan setup can keep the selected endpoint while defaulting to `glm-5` when available or `glm-4.7` as fallback. (#45969) Thanks @obviyus.
 - CI/onboarding smoke: surface `ensure-base-commit` fetch failures as workflow warnings and fail the onboarding Docker smoke when expected setup prompts drift instead of continuing silently. Thanks @Takhoffman.

apps/android/app/src/main/java/ai/openclaw/app/protocol/OpenClawCanvasA2UIAction.kt

@@ -58,9 +58,12 @@ object OpenClawCanvasA2UIAction {
   }
 
   fun jsDispatchA2UIActionStatus(actionId: String, ok: Boolean, error: String?): String {
-    val err = (error ?: "").replace("\\", "\\\\").replace("\"", "\\\"")
+    val err = jsonStringLiteral(error ?: "")
     val okLiteral = if (ok) "true" else "false"
-    val idEscaped = actionId.replace("\\", "\\\\").replace("\"", "\\\"")
-    return "window.dispatchEvent(new CustomEvent('openclaw:a2ui-action-status', { detail: { id: \"${idEscaped}\", ok: ${okLiteral}, error: \"${err}\" } }));"
+    val idLiteral = jsonStringLiteral(actionId)
+    return "window.dispatchEvent(new CustomEvent('openclaw:a2ui-action-status', { detail: { id: ${idLiteral}, ok: ${okLiteral}, error: ${err} } }));"
   }
+
+  private fun jsonStringLiteral(raw: String): String =
+    JsonPrimitive(raw).toString().replace("\u2028", "\\u2028").replace("\u2029", "\\u2029")
 }

apps/android/app/src/test/java/ai/openclaw/app/protocol/OpenClawCanvasA2UIActionTest.kt

@@ -46,4 +46,18 @@ class OpenClawCanvasA2UIActionTest {
       js,
     )
   }
+
+  @Test
+  fun jsDispatchA2uiStatusQuotesControlCharacters() {
+    val js =
+      OpenClawCanvasA2UIAction.jsDispatchA2UIActionStatus(
+        actionId = "a1\n\u2028\"",
+        ok = false,
+        error = "parse failed\n\t\u2029\\",
+      )
+    assertEquals(
+      "window.dispatchEvent(new CustomEvent('openclaw:a2ui-action-status', { detail: { id: \"a1\\n\\u2028\\\"\", ok: false, error: \"parse failed\\n\\t\\u2029\\\\\" } }));",
+      js,
+    )
+  }
 }