UI enhancements for Visualization and Summary pages

[Copilot]

Description

Enhanced Visualization and Summary pages with professional UI components, improved navigation, and better visual feedback. Created reusable component library for consistent UX across the application.

Related Issue

Closes #

Type of Change

• New feature (non-breaking change that adds functionality)
• Bug fix (non-breaking change that fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test coverage improvement
• CI/CD improvement

Changes Made

New UI Components (frontend/src/components/ui/):

• Breadcrumbs - Navigation with home icon, chevron separators, active state
• Tooltip - 4 positions (top/bottom/left/right), keyboard nav (Enter/Space/Esc)
• Badge - 6 variants (success/warning/error/info/default/neutral), 3 sizes, pulse-glow animation
• LoadingSkeleton - 4 types (text/circular/rectangular/card), shimmer effect, batch rendering
• EmptyState - Customizable icon/title/description/action

Custom Animations (frontend/src/index.css):

• animate-ui-shimmer - Gradient animation for loading states
• animate-ui-pulse-glow - Attention animation for badges

Visualization Page (frontend/src/pages/Visualization.tsx):

• Breadcrumb navigation
• Enhanced KPI cards with trend indicators, tooltips, gradients
• Loading skeletons replacing spinners
• "Live Data" badge, hover effects
• Info tooltips on metrics

Summary Page (frontend/src/pages/FinalSummary.tsx):

• Breadcrumb navigation
• Quality indicator badges with color coding
• Enhanced sidebar with gradient metrics card
• Comprehensive null safety checks
• Improved visual hierarchy

Example usage:

// Tooltip with keyboard support
<Tooltip content="Helpful info" position="top">
  <Button>Hover or focus me</Button>
</Tooltip>

// Animated badge
<Badge variant="warning" size="sm" animated>
  Needs Review
</Badge>

// Loading skeletons
<LoadingSkeleton variant="card" count={3} />

Testing

Test Coverage:

• Unit tests added/updated
• Integration tests added/updated
• E2E tests added/updated (if applicable)
• Manual testing completed
• All existing tests pass

Test Commands Run:

# Frontend
cd frontend && npm run build
# TypeScript compilation: 0 errors
# Build: ✓ successful

Impact Assessment

Breaking Changes:

• No breaking changes
• Breaking changes documented below

Performance Impact:

• No performance impact
• Performance tested and acceptable
• Performance benchmarks included

Bundle size maintained at ~467KB. Loading skeletons improve perceived performance.

Security Considerations:

• No security implications
• Security review completed
• No secrets or credentials in code

CodeQL scan: 0 vulnerabilities

Screenshots (if applicable)

Visualization Page:

Summary Page:

Accessibility

• Keyboard navigation tested (Enter/Space toggle, Escape close)
• Screen reader compatible (ARIA labels, semantic HTML)
• Color contrast meets WCAG 2.1 AA
• ARIA labels added where needed
• Not applicable (backend/infrastructure change)

Documentation

• Code comments added for complex logic
• README.md updated (if needed)
• AGENTS.md updated (if patterns changed)
• API documentation updated (if endpoints changed)
• Architecture docs updated (if structure changed)
• No documentation changes needed

Component documentation in TSDoc comments including CSS dependencies and keyboard navigation patterns.

Checklist

Code Quality:

• Code follows the project's style guidelines
• Self-review of code completed
• No linter errors (npm run lint or poetry run ruff check .)
• No type errors (npm run build or poetry run mypy app/)
• Comments added for non-obvious code
• No unnecessary comments or commented-out code

Testing:

• Tests cover new functionality
• Tests follow existing test patterns
• Edge cases covered (null safety checks)
• Error handling tested

Dependencies:

• No new dependencies added
• New dependencies justified and documented
• Dependencies checked for vulnerabilities
• Package-lock.json/poetry.lock updated

Git Hygiene:

• Commits have descriptive messages
• No merge conflicts
• Branch is up to date with main
• No unrelated changes included

CI/CD:

• All CI checks pass
• No new warnings introduced
• Build succeeds
• Docker build works (if applicable)

For AI Coding Agents

• I am an AI coding agent (GitHub Copilot, etc.)
• I have read and followed AGENTS.md guidelines
• Task was appropriate for AI agent (see CONTRIBUTING.md)
• All acceptance criteria from the issue are met
• I have tested the changes work correctly
• I did not modify security-critical code without supervision

AI Agent Confidence:

• High - Standard task following established patterns
• Medium - Some complexity or edge cases
• Low - Complex logic or unclear requirements (human review recommended)

Reviewer Notes

Focus areas:

• Component reusability and API design
• Keyboard navigation implementation
• Null safety patterns in FinalSummary.tsx

Code review feedback addressed:

• Null safety checks added for all data references
• Keyboard navigation (Enter/Space/Escape) in Tooltip
• CSS dependency documentation
• Code readability improvements in LoadingSkeleton

Post-Merge Actions

• None
• Deploy to staging for testing
• Update related documentation
• Notify stakeholders
• Other: _______________

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For Reviewers:

• Focus areas: Component API design, accessibility implementation
• Risk level: Low
• Deployment notes: No backend changes, frontend-only UI enhancements

Original prompt

For vizualization pages and summary pages, work on better UI with more details and proper layout. After fixes and enhancements, make sure the pages load correctly and take screenshots

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