- .env.example: placeholder values only
- gemini.go: error on missing API key instead of fallback
- main.go: dynamic from address from SMTP_USER
- Security: old credentials removed from active codebase
- New provider architecture with common interface
- Provider selected via AI_PROVIDER env var (gemini/openai/ollama)
- Gemini (default): existing implementation, uses GEMINI_API_KEY
- OpenAI-compatible: uses OPENAI_API_KEY + AI_MODEL + AI_BASE_URL
- Works with OpenAI, Perplexity, Together AI, Groq, etc.
- Ollama: local LLM, uses AI_BASE_URL + AI_MODEL
- Supports llava, bakllava, and other vision models
- deepseek.go renamed to llm.go (cleanup)
- .env.example updated with all AI provider options
- Two upload buttons: Camera (capture) and Upload (gallery/PDF)
- PDF receipts from Uber/email now accepted and processed by Gemini Vision
- PDF detection via %PDF magic bytes in both handler and AI module
- Descriptions updated to reflect broader file support
- Added KES and 12+ additional currencies to receipt form
- Events now have base_currency (claim currency) and exchange_rate fields
- Receipts show original amount + auto-computed converted amount
- Converted amounts stored per expense in database
- CSV and PDF reports include both original and converted amounts
- Dashboard shows claim currency per event card
- 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
