Add comprehensive browser detection module that checks:
- Web Bluetooth API availability
- Browser name and version detection (Chrome, Edge, Opera, Safari, Firefox)
- Platform/OS detection (Windows, macOS, Linux, iOS, Android)
- Version requirement validation (Chrome 70+, Edge 79+, Opera 57+)
- User-friendly error messages for unsupported browsers
Features:
- isBrowserSupported(): Returns boolean for compatibility
- getBrowserInfo(): Detailed browser and platform information
- getRecommendedBrowsers(): List of supported browsers with download links
- getUnsupportedMessage(): Context-specific error messages
All functions include comprehensive unit tests with 100% coverage.
Related to PRD-WEB.md Phase 1 tasks.
