fix(gateway): prevent broken emoji in WebSocket log IDs (#105001)

* fix(gateway): preserve Unicode in WebSocket log IDs

* test(gateway): cover UTF-16-safe log IDs

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/gateway/ws-log.test.ts

@@ -5,6 +5,29 @@ import { describe, expect, test } from "vitest";
 import { formatForLog, summarizeAgentEventForWsLog } from "./ws-log.js";
 
 describe("gateway ws log helpers", () => {
+  test.each([
+    {
+      name: "run ID prefix boundary",
+      payload: { runId: `${"a".repeat(11)}🚀${"b".repeat(20)}` },
+      field: "run",
+      expected: `${"a".repeat(11)}…bbbb`,
+    },
+    {
+      name: "tool-call ID suffix boundary",
+      payload: {
+        stream: "tool",
+        data: { toolCallId: `${"a".repeat(25)}🚀bbb` },
+      },
+      field: "call",
+      expected: `${"a".repeat(12)}…bbb`,
+    },
+  ])("summarizeAgentEventForWsLog keeps the $name UTF-16 safe", ({ payload, field, expected }) => {
+    const value = summarizeAgentEventForWsLog(payload)[field];
+
+    expect(value).toBe(expected);
+    expect(value).not.toMatch(/[\uD800-\uDFFF]/);
+  });
+
   test.each([
     {
       name: "formats Error instances",

src/gateway/ws-log.ts

@@ -1,7 +1,7 @@
 // Gateway WebSocket log formatting.
 // Redacts and compacts request/response/event metadata for console diagnostics.
 import { readStringValue } from "@openclaw/normalization-core/string-coerce";
-import { truncateUtf16Safe } from "@openclaw/normalization-core/utf16-slice";
+import { sliceUtf16Safe, truncateUtf16Safe } from "@openclaw/normalization-core/utf16-slice";
 import chalk from "chalk";
 import { resolveSendableOutboundReplyParts } from "openclaw/plugin-sdk/reply-payload";
 import { isVerbose } from "../globals.js";
@@ -104,12 +104,12 @@ export function shouldLogWs(): boolean {
 function shortId(value: string): string {
   const s = value.trim();
   if (UUID_RE.test(s)) {
-    return `${s.slice(0, 8)}…${s.slice(-4)}`;
+    return `${sliceUtf16Safe(s, 0, 8)}…${sliceUtf16Safe(s, -4)}`;
   }
   if (s.length <= 24) {
     return s;
   }
-  return `${s.slice(0, 12)}…${s.slice(-4)}`;
+  return `${sliceUtf16Safe(s, 0, 12)}…${sliceUtf16Safe(s, -4)}`;
 }
 
 /** Formats and redacts arbitrary values before they are written to gateway logs. */