🐛 fix: native bridge buffer range

[tp26610]

PR Summary by Typo

Overview

This PR addresses a bug where Buffer objects with a non-zero byteOffset were not correctly handled when passed to native bridge functions, leading to incorrect cryptographic computations. The fix involves introducing a utility to ensure proper ArrayBuffer conversion for all Buffer instances.

Key Changes

• Introduced a new toArrayBuffer utility function to correctly convert Buffer objects, especially those with a byteOffset, into ArrayBuffer for native calls.
• Updated DiffieHellman and ECDH classes to use toArrayBuffer for all native bridge interactions involving buffers (e.g., init, computeSecret, setPublicKey, setPrivateKey).
• Added a new test case to ecdh_tests.ts to specifically verify that computeSecret works as expected when provided with a sliced public key buffer.

Work Breakdown

Category	Lines Changed
New Work	40 (72.7%)
Churn	7 (12.7%)
Rework	8 (14.5%)
Total Changes	55

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Static Code Review 📊

✅ All quality checks passed!

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AI Code Review 🤖

Files Reviewed: 3
Comments Added: 0
Lines of Code Analyzed: 63
Critical Issues: 0

PR Health: Excellent 🔥

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