- OTP: 6 separate inputs → single 6-digit field with copy/paste support
- Event page: shows name, currency, exchange rate at top
- Edit toggle: unlock to edit fields, lock to save (via PUT)
- Delete button with confirmation popup
- DeleteEvent handler + DB function + route
- Backward compatible: collectOTP strips non-digits
CR-1: Path traversal in createReceiptZip — validate image_path is within storage/
CR-2: Missing authz on EditExpense/UpdateExpense — verify event ownership
CR-3: OTP timing side-channel — use crypto/subtle.ConstantTimeCompare
CR-4: Logout doesn't invalidate session — moved to AuthHandler with Sessions.Delete()
CR-5: OTP reuse race condition — mutex lock around validate+delete
CR-6: Live credentials on disk — removed .env from disk entirely
CR-7: No TLS — documented as expected behind-proxy deployment
Additional:
- Removed stale github.com/expenseflow import path from auth.go
- Made EnvironmentFile optional (prefix with -) so .env is not required
- App runs and starts clean without any .env file
- Email now includes both report (CSV/PDF) + ZIP of all receipt images
- ZIP images named {event-name}-{index}.{ext} matching list order
- Uses Go's archive/zip (stdlib, no external deps)
- Sender.SendReport now accepts []*Attachment for multiple files
- Gracefully skips missing image files with warnings
- 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
