Adds a Reports dashboard view (`ReportsView`) to the reports plugin with a full supporting stack of components (`ReportComparisonDrawer`, `ReportDetailPanel`, `ReportFiltersBar`, `ReportListItem`, `ReportEmptyState`), hooks (`useReports`, `useReportPreview`, `useReportSectionDiff`, `useViewportMode`
Fusion-Task-Id: FN-3786
Adds a complete HTML rendering and export pipeline to the fusion-plugin-reports plugin, including a standalone HTML renderer with template and stylesheet support, new export routes (`/api/reports/:id/export/html`) that persist rendered HTML to the store, and plugin-type support for non-JSON route re
Fusion-Task-Id: FN-3785
