[zhangzhenghao]

Summary

• Rename the public Node.js class from Model to CLAP.
• Expose idiomatic camelCase encodeText() and encodeAudio() only for inference, retaining idempotent close() for early resource release.
• Hide tokenizer, model metadata, frame/features APIs and standalone audio decoding/resampling utilities; remove old names rather than adding aliases.
• Accept audio paths directly in encodeAudio(path, cropOffset?), as well as mono PCM in encodeAudio(pcm, sampleRate?, cropOffset?).
• Update TypeScript declarations, documentation, runtime tests and npm packaged-file coverage.

Verification

• Regression test observed failing against the old export surface and again against snake_case method names before the respective implementations.
• Native CPU addon rebuilt successfully.
• All 7 runtime/API tests pass, including real CLAP/MERT inference, independent NumPy text oracle, file/PCM equivalence and reentrant-close safety.
• TypeScript checks and packaging-content test pass.
• npm pack and a fresh standalone source-tarball installation succeed.
• Installed binary passes checkout tests; installed package generates its own fixtures and passes all 7 tests.
• Independent review passed the initial change; camelCase naming delta reviewed separately.

PR CI

• Node.js CPU matrix passes on Linux x64, Linux ARM64, macOS and Windows, including standalone source-distribution installation and tests.
• Python and Rust workflows pass.
• General native CI passes on Linux x64/ARM64 and Windows x64/ARM64; its macOS job is still queued.
• All results above are for commit d49cd9d8af976e5da9103ba34b20d235d757d886.