fix(NetworkGraph): remove @ts-nocheck, narrow fcose import ignore

Removed file-level @ts-nocheck to restore type checking.
Kept targeted @ts-expect-error for cytoscape-fcose import (no types).

src/components/NetworkGraph.tsx

@@ -1,7 +1,6 @@
-// @ts-nocheck
-
 import cytoscape from 'cytoscape'
-// @ts-expect-error
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-expect-error — cytoscape-fcose has no @types
 import fcose from 'cytoscape-fcose'
 import { Crosshair, Eye, Maximize2, RotateCcw, ZoomIn, ZoomOut } from 'lucide-react'
 import { useCallback, useEffect, useRef } from 'react'