feat: add Pomodoro Timer Prototype - #13
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Single HTML page with embedded CSS/JS implementing: - Configurable timer input (minutes only) - MM:SS countdown display - Start/Pause/Resume/Reset controls - Web Audio API chime notification (works in background tabs) - Graceful permission handling and error states - ARIA labels, keyboard navigation, screen reader support - Input validation (1-999 minutes, integers only) - Visual state indication (running/paused/completed)
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Closes #1
Implementation
Single HTML file (
pomodoro-timer.html) with embedded CSS/JS — zero external dependencies.Background Audio
Uses Web Audio API (AudioContext + OscillatorNode) for notification chime, which is the only reliable way to play sound in Chrome background tabs. HTMLAudioElement gets throttled; Web Audio API does not.
Features
Error Handling
Testing Notes
See
docs/README.mdfor detailed browser limitation documentation and test scenarios.