partly or unimplemented features - now implemented

docs/features/unchecked/attestor/evidence-subgraph-ui-visualization.md

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+# Evidence Subgraph UI Visualization
+
+## Module
+Attestor
+
+## Status
+IMPLEMENTED
+
+## Description
+Backend proof graph model is implemented (nodes, edges, subgraphs, paths). Evidence panel e2e tests exist. Full frontend visualization component status unclear from source search alone.
+
+## What's Implemented
+- **Proof Graph Model**: `src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Graph/InMemoryProofGraphService.cs` (with `.Mutation`, `.Queries`, `.Subgraph`) -- graph service with node/edge management, subgraph extraction, and path queries.
+- **Graph Node**: `Graph/ProofGraphNode.cs` -- node model with type and metadata.
+- **Graph Edge**: `Graph/ProofGraphEdge.cs` -- edge model with type linking nodes.
+- **Graph Node/Edge Types**: `Graph/ProofGraphNodeType.cs`, `Graph/ProofGraphEdgeType.cs` -- typed node and edge enumerations.
+- **Graph Path**: `Graph/ProofGraphPath.cs` -- path through the proof graph.
+- **Graph Subgraph**: `Graph/ProofGraphSubgraph.cs` -- extracted subgraph for a specific subject.
+
+## What's Missing
+- **Frontend graph visualization component**: No Angular component rendering the proof graph as an interactive visualization (nodes as circles/rectangles, edges as arrows).
+- **Interactive exploration**: No click-to-expand, zoom, pan, or filter functionality for graph navigation in the UI.
+- **Subgraph API endpoint**: The WebService controllers do not expose a dedicated endpoint for fetching proof graph subgraphs for a given subject.
+- **Graph layout algorithm**: No force-directed or hierarchical layout algorithm for rendering the graph in 2D.
+- **Evidence node detail panel**: No side panel showing node details (attestation content, verification status) when a node is selected.
+
+## Implementation Plan
+- Add a REST endpoint in `ProofChainController` for subgraph queries by subject
+- Create an Angular component using a graph visualization library (e.g., D3.js or Cytoscape.js)
+- Implement interactive exploration (zoom, pan, click-to-expand, filtering by node/edge type)
+- Add a node detail panel showing attestation content and verification status
+- Implement graph layout algorithm (hierarchical for proof chains, force-directed for evidence graphs)
+- Add e2e tests for graph rendering and interaction
+
+## Related Documentation
+- Source: See feature catalog