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-core/src/models/scan.rs

@@ -11,6 +11,8 @@ pub enum ScanType {
     Cve,
     Gdpr,
     OAuth,
+    Graph,
+    Dast,
 }
 
 impl std::fmt::Display for ScanType {
@@ -21,6 +23,8 @@ impl std::fmt::Display for ScanType {
             Self::Cve => write!(f, "cve"),
             Self::Gdpr => write!(f, "gdpr"),
             Self::OAuth => write!(f, "oauth"),
+            Self::Graph => write!(f, "graph"),
+            Self::Dast => write!(f, "dast"),
         }
     }
 }
@@ -41,8 +45,10 @@ pub enum ScanPhase {
     SbomGeneration,
     CveScanning,
     PatternScanning,
+    GraphBuilding,
     LlmTriage,
     IssueCreation,
+    DastScanning,
     Completed,
 }