feat: improve real-time updates and prevent duplicate edges

- Reduce polling interval from 5s to 100ms for near real-time updates
- Add awaitRefetchQueries to CREATE_WORK_ITEM mutation for immediate cache updates
- Fix isRelationshipDisabled function to properly validate duplicate edges
- Implement comprehensive duplicate prevention using validateNewConnection
- Enhance edge creation validation in ConnectNodeModal

Author: Patel230

packages/web/src/components/ConnectNodeModal.tsx

@@ -1042,8 +1042,18 @@ export function ConnectNodeModal({ isOpen, onClose, sourceNode, initialTab = 'co
   // Check if any relationship type is disabled (any relationship already exists with selected nodes)
   const isRelationshipDisabled = (relationshipType: string) => {
     if (selectedNodes.size === 0) return false;
-    // With one-relationship-at-a-time policy, disable if ANY relationship exists
-    return false; // Simplified for now
+    
+    // Check if this relationship type would create duplicates for ANY selected node
+    return Array.from(selectedNodes).some(targetId => {
+      const validation = validateNewConnection(
+        sourceNode.id,
+        targetId,
+        relationshipType,
+        existingEdges,
+        workItems
+      );
+      return !validation.isValid;
+    });
   };
 
   // Filter out the source node and apply search/filters

packages/web/src/components/GraphVisualization.tsx

@@ -70,14 +70,14 @@ export function GraphVisualization() {
       options: { limit: 100 }
     },
     fetchPolicy: 'cache-and-network',
-    pollInterval: 5000,
+    pollInterval: 100,
     notifyOnNetworkStatusChange: true,
     errorPolicy: 'all'
   });
 
   const { data: edgesData, loading: edgesLoading } = useQuery(GET_EDGES, {
     fetchPolicy: 'cache-and-network',
-    pollInterval: 5000,  // Also poll edges for consistency
+    pollInterval: 100,  // Also poll edges for consistency
     notifyOnNetworkStatusChange: true
   });
 

packages/web/src/components/InteractiveGraphVisualization.tsx

@@ -73,7 +73,7 @@ export function InteractiveGraphVisualization() {
       }
     } : { where: {} },
     fetchPolicy: currentGraph ? 'cache-and-network' : 'cache-only',
-    pollInterval: currentGraph ? 5000 : 0,
+    pollInterval: currentGraph ? 100 : 0,
     errorPolicy: 'all'
   });
 
@@ -88,7 +88,7 @@ export function InteractiveGraphVisualization() {
       }
     } : { where: {} },
     fetchPolicy: currentGraph ? 'cache-and-network' : 'cache-only',
-    pollInterval: currentGraph ? 5000 : 0,
+    pollInterval: currentGraph ? 100 : 0,
     errorPolicy: 'all'
   });
 
@@ -105,7 +105,8 @@ export function InteractiveGraphVisualization() {
           }
         } : { where: {} }
       }
-    ]
+    ],
+    awaitRefetchQueries: true
   });
 
   // Mutation for creating edges