Tesseract OCR fails on rotated/low-contrast CD back covers.
New vision_llm module sends images directly to qwen3-vl via
Ollama chat API, bypassing OCR entirely. Robust JSON extraction
handles thinking tags, markdown blocks, and empty responses.
CLI scan/process commands gain --vision flag.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
