dsh-client-ui-trace-graph: DSH Web Trace Graph Visualization

The DSH Web GUI plugin adds an interactive ReactFlow DAG alongside the official “Trajectory” tab, using official data to visualize execution history. Nodes represent trajectory records (such as SYSTEM, USER, and TOOL), while edges indicate temporal order (gray dashed lines) and structural relationships (colored solid lines). Users can click a node to view JSON details and switch between dagre and d3-force layouts. Installation requires Node.js ^22.19 or >=24, with attention to pnpm version compatibility issues.