fix: sanitize thinking blocks for GitHub Copilot Claude models (openclaw#19459) thanks @jackheuberger

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: jackheuberger <12731288+jackheuberger@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/agents/pi-embedded-runner/google.ts

@@ -25,6 +25,7 @@ import {
 import type { TranscriptPolicy } from "../transcript-policy.js";
 import { resolveTranscriptPolicy } from "../transcript-policy.js";
 import { log } from "./logger.js";
+import { dropThinkingBlocks } from "./thinking.js";
 import { describeUnknownError } from "./utils.js";
 
 const GOOGLE_TURN_ORDERING_CUSTOM_TYPE = "google-turn-ordering-bootstrap";
@@ -50,6 +51,7 @@ const GOOGLE_SCHEMA_UNSUPPORTED_KEYWORDS = new Set([
   "minProperties",
   "maxProperties",
 ]);
+
 const ANTIGRAVITY_SIGNATURE_RE = /^[A-Za-z0-9+/]+={0,2}$/;
 const INTER_SESSION_PREFIX_BASE = "[Inter-session message]";
 
@@ -450,9 +452,12 @@ export async function sanitizeSessionHistory(params: {
       ...resolveImageSanitizationLimits(params.config),
     },
   );
-  const sanitizedThinking = policy.normalizeAntigravityThinkingBlocks
-    ? sanitizeAntigravityThinkingBlocks(sanitizedImages)
+  const droppedThinking = policy.dropThinkingBlocks
+    ? dropThinkingBlocks(sanitizedImages)
     : sanitizedImages;
+  const sanitizedThinking = policy.sanitizeThinkingSignatures
+    ? sanitizeAntigravityThinkingBlocks(droppedThinking)
+    : droppedThinking;
   const sanitizedToolCalls = sanitizeToolCallInputs(sanitizedThinking);
   const repairedTools = policy.repairToolUseResultPairing
     ? sanitizeToolUseResultPairing(sanitizedToolCalls)