Fix 'Unknown' showing in edge click modal

When clicking edges in the graph, the modal was showing "Unknown is the
subject of..." because the backend optimizes responses by not duplicating
node data - edgesFrom only includes endNode (current node IS startNode),
and edgesTo only includes startNode (current node IS endNode).

Now the frontend fills in the missing node reference when creating edge
data, so the modal can display proper names.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: gvelez17

src/containers/Explore/graph.utils.ts

@@ -288,7 +288,11 @@ const parseSingleNode = (
           target: e.endNodeId.toString(),
           relation: edgeLabel,
           label: edgeLabel,
-          raw: e,
+          raw: {
+            ...e,
+            // For edgesFrom, the current node IS the startNode (backend omits it to save data)
+            startNode: e.startNode || node
+          },
           color: edgeStyle.color,
           width: edgeStyle.width,
           arrow: edgeStyle.arrow,
@@ -339,7 +343,11 @@ const parseSingleNode = (
           target: e.endNodeId.toString(),
           relation: edgeLabel,
           label: edgeLabel,
-          raw: e,
+          raw: {
+            ...e,
+            // For edgesTo, the current node IS the endNode (backend omits it to save data)
+            endNode: e.endNode || node
+          },
           color: edgeStyle.color,
           width: edgeStyle.width,
           arrow: edgeStyle.arrow,