- Fix TideDisplay component crash (use extremes instead of tides)
- Handle 401 weather API errors gracefully (return null data with note)
- Update weather controller to return 200 with null values instead of 503
- Add helpful message about API key activation time
- Fix tide type capitalization (High/Low instead of high/low)
- Add WeatherWidget for current weather conditions
- Add TideDisplay for tide times and heights
- Add WaterQualityIndicator for EPA water quality data
- Add BeachQualityDisplay for beach ratings and certifications
- Add BiodiversityInfo for marine biodiversity information
- Add EnvironmentalDataPanel composite component
- Create externalDataService for API integration
- Add types for external environmental data
- Create demo page at /demo/environmental-data
- Add comprehensive README documentation
Fulfills requirements 11.1, 11.2, 11.3, 11.4, 11.6, 11.7
Completes task 19 from implementation plan
