Database Panels:
- Add D3.js force-directed graph visualization to Oxigraph and TypeDB panels
- Add 'Explore' tab with class/entity browser, graph/table toggle, and search
- Add data explorer to PostgreSQL panel with table browser, pagination, search, export
- Fix SPARQL variable naming bug in Oxigraph getGraphData() function
- Add node details panel showing selected entity attributes
- Add zoom/pan controls and node coloring by entity type
Map Features:
- Add TimelineSlider component for temporal filtering of institutions
- Support dual-handle range slider with decade histogram
- Add quick presets (Ancient, Medieval, Modern, Contemporary)
- Show institution density visualization by founding decade
Hooks:
- Extend useOxigraph with getGraphData() for graph visualization
- Extend useTypeDB with getGraphData() for graph visualization
- Extend usePostgreSQL with getTableData() and exportTableData()
- Improve useDuckLakeInstitutions with temporal filtering support
Styles:
- Add HeritageDashboard.css with shared panel styling
- Add TimelineSlider.css for timeline component styling
