Update all category-related UI components to use getCategoryColorHex() function
instead of CSS variables for consistent color application across the app.
Changes:
- MainConverter: category buttons now use hex colors for background/border
- MainConverter: quick result display uses hex color for text and border
- MainConverter: result cards use hex color for left border
- CommandPalette: measure commands use hex colors for color indicators
- SearchUnits: category color dots use hex colors
This ensures all category colors are consistently applied using the same
hex color values defined in the OKLCH color palette.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Sebastian Krüger
eb556ddfce