Few small accessibility fixes

[shinyichen]

• Fix color contrasts
• Add skip facets link in
• Add skip abstract navigation link in abstract
• Add skip author list link in abstract

Screen.Recording.2026-04-09.at.2.45.33.PM.mov

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.5%. Comparing base (006cf95) to head (781aad2).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/theme.ts	73.4%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #842     +/-   ##
========================================
- Coverage    62.5%   62.5%   -0.0%     
========================================
  Files         317     317             
  Lines       36576   36591     +15     
  Branches     1673    1673             
========================================
+ Hits        22827   22835      +8     
- Misses      13709   13716      +7     
  Partials       40      40             

Files with missing lines	Coverage Δ
src/components/Feedbacks/EmptyStatePanel.tsx	100.0% <100.0%> (ø)
src/theme.ts	91.6% <73.4%> (-0.8%)	⬇️

... and 2 files with indirect coverage changes

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[shinyichen]

Convert it to draft, more items to fix.

[thostetler]

lgtm