OCR component v0.1.0

Optional offline OCR component for KyStudy. The ZIP contains the kystudy-ocr-worker directory, ONNX Runtime and PP-OCRv6 model assets, plus third-party license notices. SHA-256: bb5a3e16a898713adde85717f4debe8cfbdf22cae10eb632752368f200513b01. KyStudy downloads and verifies this asset before installation; manual installation remains available.