fix: use challenge parameter in verifyJwtWebCrypto preimage

- Remove unused client data hashing in verifyJwtWebCrypto
- Use challenge parameter directly in preimage construction
- Fix TS6133 error for unused challenge parameter
- Make verification logic consistent with verifyJwtP256

This change maintains the same verification logic while properly
utilizing the challenge parameter in the signature verification.

src/libs/crypto/vc/passkeyDidPeer.ts

@@ -398,11 +398,12 @@ export async function verifyJwtWebCrypto(
   const sigBuffer = Buffer.from(signature, "base64");
   const finalSigBuffer = unwrapEC2Signature(sigBuffer);
 
-  // Hash the client data
+  // Use challenge in preimage construction
-  const hash = sha256(clientDataFromBase);
+  const preimage = Buffer.concat([
+    authDataFromBase,
+    Buffer.from(challenge),
+  ]);
 
-  // Construct the preimage
-  const preimage = Buffer.concat([authDataFromBase, hash]);
   return verifyPeerSignature(preimage, issuerDid, finalSigBuffer);
 }