Chandler Copeland e7bf5abb9f fix(13): switch to GPT-4o vision — render PDF pages as images for accurate field placement ...

- extractPdfText now renders each page to JPEG via @napi-rs/canvas + pdfjs-dist (108dpi)
- field-placement.ts sends rendered page images to GPT-4o with vision (detail: high)
- AI can now visually identify underlines, signature blocks, date fields, initials boxes
- System prompt focuses on visual cues (blank lines, boxes) not text pattern matching
- Handles multi-field lines: separate fields for signature blank and date blank on same line

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-21 17:40:47 -06:00

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