- Add AssessmentBadge component with hover tooltips explaining thresholds
- Add Key Takeaways summary section surfacing top actionable findings
- Add cost attribution stacked bar and per-token calculation breakdowns
- Add clickable navigation from takeaways and tool errors to detail sections
- Add theme-aware assessment colors via CSS variables for light/dark mode
- Collapse lower-priority sections by default for progressive disclosure
- Replace all hardcoded color hex values with CSS variable references
- Fix missing Fragment key in CostSection model table
- Add defensive division-by-zero guard in stacked bar calculation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
