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-agent/src/api/routes.rs

@@ -22,4 +22,54 @@ pub fn build_router() -> Router {
         .route("/api/v1/sbom", get(handlers::list_sbom))
         .route("/api/v1/issues", get(handlers::list_issues))
         .route("/api/v1/scan-runs", get(handlers::list_scan_runs))
+        // Graph API endpoints
+        .route(
+            "/api/v1/graph/{repo_id}",
+            get(handlers::graph::get_graph),
+        )
+        .route(
+            "/api/v1/graph/{repo_id}/nodes",
+            get(handlers::graph::get_nodes),
+        )
+        .route(
+            "/api/v1/graph/{repo_id}/communities",
+            get(handlers::graph::get_communities),
+        )
+        .route(
+            "/api/v1/graph/{repo_id}/impact/{finding_id}",
+            get(handlers::graph::get_impact),
+        )
+        .route(
+            "/api/v1/graph/{repo_id}/search",
+            get(handlers::graph::search_symbols),
+        )
+        .route(
+            "/api/v1/graph/{repo_id}/build",
+            post(handlers::graph::trigger_build),
+        )
+        // DAST API endpoints
+        .route(
+            "/api/v1/dast/targets",
+            get(handlers::dast::list_targets),
+        )
+        .route(
+            "/api/v1/dast/targets",
+            post(handlers::dast::add_target),
+        )
+        .route(
+            "/api/v1/dast/targets/{id}/scan",
+            post(handlers::dast::trigger_scan),
+        )
+        .route(
+            "/api/v1/dast/scan-runs",
+            get(handlers::dast::list_scan_runs),
+        )
+        .route(
+            "/api/v1/dast/findings",
+            get(handlers::dast::list_findings),
+        )
+        .route(
+            "/api/v1/dast/findings/{id}",
+            get(handlers::dast::get_finding),
+        )
 }