Implement Agent 7: Advanced Analytics Dashboard
Add comprehensive analytics system with:
- Analytics data layer (aggregator, metrics, trends, cache)
- 6 API endpoints (overview, plants, transport, farms, sustainability, export)
- 6 chart components (LineChart, BarChart, PieChart, AreaChart, Gauge, Heatmap)
- 5 dashboard widgets (KPICard, TrendIndicator, DataTable, DateRangePicker, FilterPanel)
- 5 dashboard pages (overview, plants, transport, farms, sustainability)
- Export functionality (CSV, JSON)
Dependencies added: recharts, d3, date-fns
Also includes minor fixes:
- Fix EnvironmentalForm spread type error
- Fix AgentOrchestrator Map iteration issues
- Fix next.config.js image domains undefined error
- Add downlevelIteration to tsconfig
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