diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index 02564eab7..91edd0d31 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "2de0113608cf264decf1427223de0fd5f6d2ddab",
-  "syncedAt": "2026-05-05T05:00:29.054Z"
+  "sha": "1d6de8da9f03b507913ebd6c0e679bdcfe11322b",
+  "syncedAt": "2026-05-05T05:00:47.944Z"
 }
diff --git a/docs/web/control-ui.md b/docs/web/control-ui.md
index 0fb72fc76..d3a1e9032 100644
--- a/docs/web/control-ui.md
+++ b/docs/web/control-ui.md
@@ -154,7 +154,7 @@ Imported themes are stored only in the current browser profile. They are not wri
     - Re-sending with the same `idempotencyKey` returns `{ status: "in_flight" }` while running, and `{ status: "ok" }` after completion.
     - `chat.history` responses are size-bounded for UI safety. When transcript entries are too large, Gateway may truncate long text fields, omit heavy metadata blocks, and replace oversized messages with a placeholder (`[chat.history omitted: message too large]`).
     - Assistant/generated images are persisted as managed media references and served back through authenticated Gateway media URLs, so reloads do not depend on raw base64 image payloads staying in the chat history response.
-    - `chat.history` also strips display-only inline directive tags from visible assistant text (for example `[[reply_to_*]]` and `[[audio_as_voice]]`), plain-text tool-call XML payloads (including `<tool_call>...</tool_call>`, `<function_call>...</function_call>`, `<tool_calls>...</tool_calls>`, `<function_calls>...</function_calls>`, and truncated tool-call blocks), and leaked ASCII/full-width model control tokens, and omits assistant entries whose whole visible text is only the exact silent token `NO_REPLY` / `no_reply`.
+    - When rendering `chat.history`, the Control UI strips display-only inline directive tags from visible assistant text (for example `[[reply_to_*]]` and `[[audio_as_voice]]`), plain-text tool-call XML payloads (including `<tool_call>...</tool_call>`, `<function_call>...</function_call>`, `<tool_calls>...</tool_calls>`, `<function_calls>...</function_calls>`, and truncated tool-call blocks), and leaked ASCII/full-width model control tokens, and omits assistant entries whose whole visible text is only the exact silent token `NO_REPLY` / `no_reply` or the heartbeat acknowledgement token `HEARTBEAT_OK`.
     - During an active send and the final history refresh, the chat view keeps local optimistic user/assistant messages visible if `chat.history` briefly returns an older snapshot; the canonical transcript replaces those local messages once the Gateway history catches up.
     - Live `chat` events are delivery state, while `chat.history` is rebuilt from the durable session transcript. After tool-final events the Control UI reloads history and merges only a small optimistic tail; the transcript boundary is documented in [WebChat](/web/webchat).
     - `chat.inject` appends an assistant note to the session transcript and broadcasts a `chat` event for UI-only updates (no agent run, no channel delivery).