- DeepSeek API does not support vision (only chat UI supports images)
- Google Gemini Vision supports native image analysis via inline_data
- Images are sent directly as base64 with proper MIME type detection
- No more OCR pipeline needed - Gemini sees the image directly
- Supports: JPEG, PNG, WebP, GIF, BMP, TIFF, HEIC, AVIF
- Updated .env.example to use GEMINI_API_KEY instead of DEEPSEEK_API_KEY
- Also: log OTP code in server log for easier debugging
- Problem: deepseek-v4-flash is text-only, cannot process base64 images - hallucinated fake data
- Solution: Two-step pipeline that actually extracts real data:
1. Tesseract OCR extracts raw text from the receipt image
2. DeepSeek v4 parses the OCR text into structured JSON
- Benefits: works with any image format, fast, accurate, no hallucinated data
- Properly handles HEIC/HEIF via heif-convert before OCR
- DeepSeek no longer supports image_url in chat completions
- Images are now resized (max 300px) and JPEG-compressed (quality 50)
- Base64 data embedded directly in text prompt for processing
- Increased API timeout to 120s for larger prompts
- Also fixed mobile receipt capture (missing name attribute on file input)
- Also fixed OTP htmx:targetError (outerHTML → innerHTML swap)
- Passwordless email OTP authentication
- Event-based expense tracking with HTMX UI
- AI receipt extraction via DeepSeek Vision API
- CSV/PDF report generation with email filing
- PWA with service worker and manifest
- Mobile-first responsive design
- SQLite database with auto-migration
