Add DAST, graph modules, toast notifications, and dashboard enhancements

Add DAST scanning and code knowledge graph features across the stack:
- compliance-dast and compliance-graph workspace crates
- Agent API handlers and routes for DAST targets/scans and graph builds
- Core models and traits for DAST and graph domains
- Dashboard pages for DAST targets/findings/overview and graph explorer/impact
- Toast notification system with auto-dismiss for async action feedback
- Button click animations and disabled states for better UX

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-dashboard/src/pages/mod.rs

@@ -1,13 +1,27 @@
+pub mod dast_finding_detail;
+pub mod dast_findings;
+pub mod dast_overview;
+pub mod dast_targets;
 pub mod finding_detail;
 pub mod findings;
+pub mod graph_explorer;
+pub mod graph_index;
+pub mod impact_analysis;
 pub mod issues;
 pub mod overview;
 pub mod repositories;
 pub mod sbom;
 pub mod settings;
 
+pub use dast_finding_detail::DastFindingDetailPage;
+pub use dast_findings::DastFindingsPage;
+pub use dast_overview::DastOverviewPage;
+pub use dast_targets::DastTargetsPage;
 pub use finding_detail::FindingDetailPage;
 pub use findings::FindingsPage;
+pub use graph_explorer::GraphExplorerPage;
+pub use graph_index::GraphIndexPage;
+pub use impact_analysis::ImpactAnalysisPage;
 pub use issues::IssuesPage;
 pub use overview::OverviewPage;
 pub use repositories::RepositoriesPage;