fix(scripts): preserve emoji in dev tooling previews (#109469)

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

scripts/lib/dev-tooling-safety.ts

@@ -1,5 +1,6 @@
 // Dev Tooling Safety script supports OpenClaw repository automation.
 import path from "node:path";
+import { truncateUtf16Safe } from "@openclaw/normalization-core/utf16-slice";
 import { redactSensitiveText } from "../../src/logging/redact.js";
 
 const REDACT_OPTIONS = { mode: "tools" } as const;
@@ -13,7 +14,7 @@ export function previewForDevToolLog(value: string, maxChars = 400): string {
   if (redacted.length <= maxChars) {
     return redacted;
   }
-  return `${redacted.slice(0, Math.max(0, maxChars - 3))}...`;
+  return `${truncateUtf16Safe(redacted, Math.max(0, maxChars - 3))}...`;
 }
 
 export function maskIdentifier(value: string | undefined, keepStart = 6, keepEnd = 4): string {

test/scripts/dev-tooling-safety.test.ts

@@ -219,6 +219,10 @@ describe("dev tooling safety helpers", () => {
     );
     expect(maskIdentifier("session-key-abcdef123456")).toBe("sessio...3456");
   });
+
+  it("does not split boundary emoji in script log previews", () => {
+    expect(previewForDevToolLog("123456😀tail", 10)).toBe("123456...");
+  });
 });
 
 describe("script-specific dev tooling hardening", () => {