UI: Add visual treatment for past journeys

[ksharma-xyz]

TL;DR

Added visual treatment for past journeys and optimized time text updates in the journey planner.

What changed?

• Added visual treatment for past journeys by reducing opacity and using a muted color scheme
• Fixed content alpha propagation for transport mode icons and badges
• Optimized time text updates to only trigger when journeys are present
• Moved time text updates to run on the IO dispatcher
• Fixed color handling for alerts in expanded journey cards
• Improved text color handling when custom colors are provided

How to test?

1. View journey cards for past trips and verify they appear faded
2. Check that transport mode icons maintain full opacity
3. Monitor CPU usage during time text updates
4. Verify alert colors appear correctly in expanded journey cards
5. Test custom text colors to ensure proper rendering

Why make this change?

To improve user experience by clearly distinguishing past journeys from upcoming ones, while also optimizing performance by reducing unnecessary UI updates. The changes also ensure consistent visual hierarchy through proper opacity handling and color management.

Screenshots

Light	Dark

[ksharma-xyz]

• UI: Improve journey card layout and time formatting #324
• UI: Add visual treatment for past journeys #323 👈
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @ksharma-xyz and the rest of your teammates on Graphite

[ksharma-xyz]

Merge activity

• Nov 8, 9:53 PM EST: A user merged this pull request with Graphite.