- Replace Redis/in-memory storage with SQLite for persistence
- Add database.ts service with tables for users, groups, purchases, participants
- Update state.ts and groupState.ts to use SQLite backend
- Fix buyer_name to use display name instead of Telegram ID
- Remove legacy reminder array handlers (now using 3-slot system)
- Add better-sqlite3 dependency, remove ioredis
- Update env.example with BOT_DATABASE_PATH option
- Add data/ directory to .gitignore for database files
Backend:
- Add configurable draw cycle settings (minutes/hourly/daily/weekly/custom)
- Add CYCLE_TYPE, CYCLE_INTERVAL_*, CYCLE_DAILY_TIME, CYCLE_WEEKLY_* env vars
- Add SALES_CLOSE_BEFORE_DRAW_MINUTES and CYCLES_TO_GENERATE_AHEAD
- Fix SQLite parameter issue in scheduler
Frontend:
- Add 'Save This Link' section with copy button on ticket status page
- Improve draw animation to show immediately when draw starts
- Show 'Waiting for next round...' instead of 'Drawing Now!' after draw
- Hide Buy Tickets button when waiting for next round
- Skip draw animation if no tickets were sold
- Keep winner screen open longer (15s) for next cycle to load
- Auto-refresh to next lottery cycle after draw
Telegram Bot:
- Various improvements and fixes
- Full Telegram bot implementation for Lightning Jackpot
- Commands: /start, /buy, /tickets, /wins, /address, /jackpot, /help
- Lightning invoice generation with QR codes
- Payment polling and confirmation notifications
- User state management (Redis/in-memory fallback)
- Group support with admin settings panel
- Configurable draw announcements and reminders
- Centralized messages for easy i18n
- Docker configuration included
