feature:DataVisualization-dashboard-#86

[DiegoERS]

Summary

Implements a fully interactive Advanced Data Visualization Dashboard with multiple chart types, drill-down capabilities, real-time data streaming, advanced filtering, drag-and-drop layout, and dashboard sharing/export.

Related Issue

Closes #86

Type of change

• Feature

Screenshots / Recording (if UI)

Testing

• npm run type-check
• npm run lint
• npm run test
• npm run build

Quality gate checklist

• CI checks pass (Frontend CI)
• At least 1–2 approvals (per branch protection rules)
• Branch is up-to-date with the base branch
• All conversations resolved
• PR description includes Closes #<issue-number>

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Files added

File	Description
src/components/dashboard/AdvancedDashboard.tsx	Main dashboard with @dnd-kit drag-and-drop grid, share button (clipboard + toast), and export all panels to CSV
src/components/dashboard/InteractiveCharts.tsx	Chart panel with 6-type switcher (line/bar/area/pie/scatter/radar) and animated drill-down with breadcrumb navigation
src/components/dashboard/DashboardFilters.tsx	Collapsible filter panel — time range, metric, aggregation, multi-select category chips with active badges and reset
src/components/dashboard/RealTimeUpdater.tsx	Live data stream panel with pause/resume, adjustable speed (0.5s–5s), stats bar (mean/median/trend)
src/hooks/useDashboardData.tsx	Central state hook — panels, filters, reorder, drill-down, share URL generation, per-panel export
src/utils/chartUtils.ts	Dashboard helpers — sample data generator, metric formatter, shareable URL encoder/decoder, drill-down data slicer
src/components/dashboard/__tests__/ + src/hooks/__tests__/	47 unit tests across 5 test files (Vitest + React Testing Library)

Implementation notes

• Reuses existing InteractiveChartLibrary, useDataVisualization hook, and visualizationUtils — no duplication
• All components use 'use client', TypeScript strict interfaces, Tailwind dark mode (dark:), lucide-react icons, and full aria-* accessibility attributes
• Real-time updates via Socket.io simulation (falls back gracefully when no WebSocket URL provided)
• Share button encodes current filter state into URL query params for collaboration

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