refactor: createPersonAnchorNodes

- created helper function buildEligiblePerson
- switch to map

src/lib/navigator/EventNetwork/utils/personNetworkBuilder.ts

@@ -107,31 +107,19 @@ export function extractUniquePersons(
 }
 
 /**
- * Creates person anchor nodes
+ * Helper to build eligible person info for anchor nodes.
  */
-export function createPersonAnchorNodes(
-  personMap: Map<string, PersonConnection>,
-  width: number,
-  height: number,
+function buildEligiblePerson(
+  pubkey: string,
+  connection: PersonConnection,
   showSignedBy: boolean,
-  showReferenced: boolean,
-  limit: number = MAX_PERSON_NODES
-): { nodes: NetworkNode[], totalCount: number } {
-  const anchorNodes: NetworkNode[] = [];
-
-  const centerX = width / 2;
-  const centerY = height / 2;
-
-  // Calculate eligible persons and their connection counts
-  const eligiblePersons: Array<{
+  showReferenced: boolean
+): {
   pubkey: string;
   connection: PersonConnection;
   connectedEventIds: Set<string>;
   totalConnections: number;
-  }> = [];
-
-  Array.from(personMap.entries()).forEach(([pubkey, connection]) => {
-    // Get all connected event IDs based on filters
+} | null {
   const connectedEventIds = new Set<string>();
 
   if (showSignedBy) {
@@ -142,16 +130,40 @@ export function createPersonAnchorNodes(
     connection.referencedInEventIds.forEach(id => connectedEventIds.add(id));
   }
 
-    // Skip if no connections match the filter
-    if (connectedEventIds.size === 0) return;
+  if (connectedEventIds.size === 0) {
+    return null;
+  }
 
-    eligiblePersons.push({
+  return {
     pubkey,
     connection,
     connectedEventIds,
     totalConnections: connectedEventIds.size
-    });
-  });
+  };
+}
+
+/**
+ * Creates person anchor nodes
+ */
+export function createPersonAnchorNodes(
+  personMap: Map<string, PersonConnection>,
+  width: number,
+  height: number,
+  showSignedBy: boolean,
+  showReferenced: boolean,
+  limit: number = MAX_PERSON_NODES
+): { nodes: NetworkNode[], totalCount: number } {
+  const anchorNodes: NetworkNode[] = [];
+
+  const centerX = width / 2;
+  const centerY = height / 2;
+
+  // Calculate eligible persons and their connection counts
+  const eligiblePersons = Array.from(personMap.entries())
+    .map(([pubkey, connection]) =>
+      buildEligiblePerson(pubkey, connection, showSignedBy, showReferenced)
+    )
+    .filter((p): p is NonNullable<typeof p> => p !== null);
 
   // Sort by total connections (descending) and take only top N
   eligiblePersons.sort((a, b) => b.totalConnections - a.totalConnections);