Various visual fixes and improvements

[anth-volk]

Summary

This PR addresses a comprehensive set of visual fixes and improvements to enhance the PolicyEngine app v2 user experience.

Fixes #535

Issues Addressed

✅ Remove deprecated "Last Run" value

• Removed the deprecated "Last Run" display from report output pages
• Updated formatReportTimestamp to return "Ran recently" for unknown timestamps

✅ Remove unnecessary stack icon in the tab headers

• Cleaned up tab header icons that were no longer needed

✅ Remove unused report return navigation

• Removed dead navigation code that was no longer functional

✅ Titles of selected elements should be sentence case

• Applied sentence case to "Policy information", "Dynamics information", and other section titles
• Updated all map titles to use sentence case (e.g., "Relative household income change by local authority")

✅ Titles of maps should be in sentence case

• Updated constituency and local authority map titles to sentence case
• Fixed chart titles across all geographic analysis pages

✅ Titles of items on every menu should be sentence case

• Updated menu items under Comparative analysis and map menus to use sentence case

✅ Reduce size of maps

• Adjusted map sizing for better visual balance

✅ Improve map color scheme and background

• Enhanced map styling to ensure un-impacted hexagons are always visible
• Improved color contrast for better accessibility

✅ Improve metadata loading

• Enhanced metadata loading behavior for smoother user experience

✅ Visually improve the loading page displayed when accessing via external link

• Simplified and improved the loading screen appearance

✅ Apply green color to MTR chart line/dot and Varying Your Earnings chart

• Harmonized chart line colors using the correct teal/green from the design system

✅ Fix param view in policy component

• Fixed parameter display in the policy component view

✅ Redesign report overview page

• Implemented new report overview pages with improved layout
• Added hero metrics for Budgetary Impact, Poverty Impact, and Winners/Losers

✅ Fix parameter change indicator

• Resolved issue where indicator sometimes showed 0 incorrectly

✅ Fix wrapping of ingredient names in ingredient display panel

• Improved text wrapping for long ingredient names

✅ Remove dead code

• Cleaned up unused code throughout the codebase

✅ Fix current law display

• Fixed "Unknown policy" display to properly show "Current law"
• Ensured current law values populate correctly in ingredient pages

✅ Add Claude visual skills

• Added .claude/skills/ documentation for design tokens, chart standards, and ingredient patterns

Test Plan

• Run npm run typecheck - passes
• Run npm run lint - passes
• Run npm run prettier - passes
• Run npm run vitest - all relevant tests pass
• Manual verification of visual changes in browser
• Verify sentence case applied consistently across UI
• Verify maps display correctly with new color scheme
• Verify report overview page displays correctly

🤖 Generated with Claude Code

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3 Skipped Deployments

Project	Deployment	Review	Updated (UTC)
policyengine-app-v2	Ignored		Dec 23, 2025 0:10am
policyengine-calculator	Ignored		Dec 23, 2025 0:10am
policyengine-website	Ignored		Dec 23, 2025 0:10am