helldivers/CHANGELOG.md

# Changelog – helldivers-trainer

## [2.0.0] – 2026-03-30

### Added
- **4 Practice modes**: Timed (configurable 15/30/45s, SVG ring timer), Endless (3 lives), Category Drill (progress bar), Speed Run (all stratagems, total time)
- **Settings modal**: timer duration and difficulty (Easy/Normal/Hard) persisted in localStorage
- **History view**: paginated session table with mode/category filters, SVG polyline score chart, best-time-per-stratagem table
- **ELO rating system**: server-side ELO (K=32) calculated after every match; rank tiers PRIVATE → GENERAL
- **Post-match result modal**: ELO delta display (`before → after +N`), round-by-round history
- **Challenge modal**: incoming challenge shows challenger name and ELO; replaces toast notification
- **Dashboard hero card**: ELO rank badge, rank icon, daily sequence preview arrows, mode column in recent sessions
- **Leaderboard tabs**: Practice Score / ELO Rating / Speed Run with correct column headers per tab
- **Mobile hamburger nav**: slide-in drawer with overlay backdrop, Esc key closes modals
- **DB migration**: `elo` column on users, `mode` column on practice_sessions, `stratagem_stats` table
- **Lobby redesign**: ELO + rank shown per player, 2-column layout (Online + Incoming Challenges)
- View fade transitions on every view switch
- Danger vignette flash at ≤5s timer remaining
- Streak fire glow effect (streak ≥ 5), combo multiplier badge (×N, streak ≥ 2)
- Keyboard shortcuts: `Esc` stops practice / closes modals, `Enter` starts practice
- `aria-label` on all D-pad buttons, modals with `role="dialog"` and `aria-modal="true"`

### Changed
- Full CSS redesign (~700 → ~1200 lines): glassmorphism cards, new design tokens, SVG timer ring, skeleton shimmer, animated modals
- Dashboard online list now shows ELO; lobby shows ELO + rank per player
- WS `lobby-update` now sends `[{name, elo, rank}]` objects instead of plain usernames
- WS `challenge-received` now includes challenger ELO
- Practice leaderboard query joined with `users.elo` for rank badge display

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## [1.0.0] – 2026-03-30

### Added
- Initial release
- Session-based auth with admin and user roles (mustChange password flow)
- Admin panel: create/delete users, view temp passwords
- Practice mode: randomized stratagem training with 30s timer, streak scoring
- Category filters for practice mode
- 1v1 mode via WebSocket: challenge system, lobby, real-time match (first to 5 rounds)
- Dashboard: personal stats, daily challenge, online users, recent sessions
- Leaderboard: top-20 by total score, sessions, match win rate
- SQLite database (WAL mode) for users, practice sessions, matches
- Helldivers 2 military UI theme (dark, yellow accents, grid overlay, scanlines)
- Mobile D-pad support
- Arrow key input with correct/wrong animations