- New Blank view hides all content but keeps controls visible
- Dashboard remembers your view preference (hourly/intervals/notes/blank)
- Updated README with direct, no-BS language
- Fixed tab items visibility - buttons always show, content hides when needed
- Zero data sent to cloud - your browsing habits stay local

This commit fixes the discrepancy between the pie chart and table data in the dashboard view. The changes ensure that:

1. The pie chart now uses the same today's data as shown in the table
2. The pie chart legend now correctly displays today's usage time for each site
3. Added a helper function getTodaySummaryTime() to consistently extract today's data

This ensures consistency across all dashboard visualizations and improves the accuracy of the data representation.

- Refactor Dashboard component to create shared data state (dashboardData) for consistent data across all dashboard views
- Update TopSitesPieChart to accept shared data prop and use it when available
- Update TabList component to accept shared data prop and prioritize shared data over independent fetching
- Add watchers in both components to reactively update when shared data changes
- Add loading state in Dashboard component while data is being fetched
- Fix button text color to black for better visibility
- Ensure pie chart, table, and legend all use the same single source of truth
- Improve performance by loading data once instead of multiple times
- Add proper null safety and default values to prevent TypeScript errors