refactor: remove legacy graph explorer

frontend/app/src/components/graph/GraphEditor.tsx

@@ -21,7 +21,6 @@ import useSWR from 'swr';
 
 export function GraphEditor ({ knowledgeBaseId }: { knowledgeBaseId: number }) {
   const [query, setQuery] = useSearchParam('query', 'sample-question:What is TiDB?');
-  const [graphStyle, setGraphStyle] = useState<'new' | 'legacy'>('new');
 
   const [key, fetcher] = getFetchInfo(knowledgeBaseId, query);
 
@@ -34,20 +33,18 @@ export function GraphEditor ({ knowledgeBaseId }: { knowledgeBaseId: number }) {
   return (
     <div className="p-4 space-y-4">
       <SubgraphSelector knowledgeBaseId={knowledgeBaseId} query={query} onQueryChange={setQuery} />
-      <GraphStyleSelector style={graphStyle} onStyleChange={setGraphStyle} />
       {(error != null) && <Alert variant="destructive">
         <AlertTitle>Failed to fetch subgraph</AlertTitle>
         <AlertDescription>{getErrorMessage(error)}</AlertDescription>
       </Alert>}
       <div className="w-full flex gap-4">
         <div className="flex-1">
           <NetworkViewer
-            key={`${query}-${graphStyle}`}
+            key={query}
             className="border rounded h-auto aspect-square"
             loading={isLoading}
             loadingTitle={'Loading knowledge graph...'}
             network={network}
-            useCanvasRenderer={graphStyle === 'new'}
             Details={(props) => (
               ref.current && createPortal(
                 <Editor
@@ -130,22 +127,6 @@ function SubgraphSelector ({ knowledgeBaseId, query, onQueryChange }: { knowledg
   );
 }
 
-function GraphStyleSelector ({ style, onStyleChange }: { style: 'new' | 'legacy', onStyleChange: (style: 'new' | 'legacy') => void }) {
-  return (
-    <div>
-      <Select value={style} onValueChange={(value) => onStyleChange(value as 'new' | 'legacy')}>
-        <SelectTrigger className="w-max">
-          <SelectValue />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="legacy">Legacy (SVG)</SelectItem>
-          <SelectItem value="new">New (Canvas)</SelectItem>
-        </SelectContent>
-      </Select>
-    </div>
-  )
-}
-
 function Editor ({ knowledgeBaseId, network, target, onTargetChange, onEnterSubgraph }: NetworkViewerDetailsProps & { knowledgeBaseId: number, onEnterSubgraph: (type: string, entityId: IdType) => void }) {
   if (target) {
     if (target.type === 'link') {

frontend/app/src/components/graph/components/NetworkCanvas.tsx

@@ -1,28 +1,26 @@
-import { useEffect, useRef, useState } from 'react';
 import type { IdType, NetworkLink, NetworkNode, ReadonlyNetwork } from '../network/Network';
-import { NetworkRenderer, type NetworkRendererOptions } from '../network/NetworkRenderer';
+import { useEffect, useRef, useState } from 'react';
+
 import { CanvasNetworkRenderer } from '../network/CanvasNetworkRenderer';
+import type { NetworkRendererOptions } from '../network/NetworkRendererOptions';
 
 export interface NetworkCanvasProps<Node extends NetworkNode, Link extends NetworkLink> extends NetworkRendererOptions<Node, Link> {
   network: ReadonlyNetwork<Node, Link>;
   target: { type: string, id: IdType } | undefined;
   className?: string;
-  useCanvasRenderer?: boolean;
 }
 
-export function NetworkCanvas<Node extends NetworkNode, Link extends NetworkLink> ({ className, network, target, useCanvasRenderer = false, ...options }: NetworkCanvasProps<Node, Link>) {
+export function NetworkCanvas<Node extends NetworkNode, Link extends NetworkLink> ({ className, network, target, ...options }: NetworkCanvasProps<Node, Link>) {
   const ref = useRef<HTMLDivElement>(null);
-  const [renderer, setRenderer] = useState<NetworkRenderer<Node, Link> | CanvasNetworkRenderer<Node, Link>>();
+  const [renderer, setRenderer] = useState<CanvasNetworkRenderer<Node, Link>>();
 
   useEffect(() => {
-    // Cleanup previous renderer if it exists (needed for renderer switching)
+    // Cleanup previous renderer if it exists
     if (renderer) {
       renderer.unmount();
     }
 
-    const newRenderer = useCanvasRenderer 
-      ? new CanvasNetworkRenderer(network, options)
-      : new NetworkRenderer(network, options);
+    const newRenderer = new CanvasNetworkRenderer(network, options);
 
     if (ref.current) {
       newRenderer.mount(ref.current);
@@ -33,7 +31,7 @@ export function NetworkCanvas<Node extends NetworkNode, Link extends NetworkLink
       newRenderer.unmount();
       setRenderer(undefined);
     };
-  }, [network, useCanvasRenderer]);
+  }, [network]);
 
   useEffect(() => {
     if (!renderer) {

frontend/app/src/components/graph/components/NetworkViewer.tsx

@@ -4,7 +4,7 @@ import { type FC, type ReactNode, useMemo, useState } from 'react';
 import { NetworkCanvas } from '../components/NetworkCanvas';
 import { NetworkContext } from '../components/NetworkContext';
 import { BaseNetwork, type IdType } from '../network/Network';
-import type { NetworkRendererOptions } from '../network/NetworkRenderer';
+import type { NetworkRendererOptions } from '../network/NetworkRendererOptions';
 import { type Entity, type Relationship } from '../utils';
 
 export interface NetworkViewerProps {
@@ -13,7 +13,6 @@ export interface NetworkViewerProps {
   loading: boolean;
   loadingTitle: ReactNode;
   Details: FC<NetworkViewerDetailsProps>;
-  useCanvasRenderer?: boolean;
 }
 
 export interface NetworkViewerDetailsProps {
@@ -32,7 +31,7 @@ function randomPosition (radius: number, kbSpacing: number, kbIndex: number, kbC
   };
 }
 
-export function NetworkViewer ({ network, loading, loadingTitle, className, Details, useCanvasRenderer = false }: NetworkViewerProps) {
+export function NetworkViewer ({ network, loading, loadingTitle, className, Details }: NetworkViewerProps) {
   const [target, setTarget] = useState<{ type: string, id: IdType }>();
 
   const knowledgeGraphIndexMap = useMemo(() => {
@@ -146,7 +145,6 @@ export function NetworkViewer ({ network, loading, loadingTitle, className, Deta
           className={cn('w-full h-full overflow-hidden')}
           network={network}
           target={target}
-          useCanvasRenderer={useCanvasRenderer}
           {...networkOptions}
         />
         <Details

frontend/app/src/components/graph/network/CanvasNetworkRenderer.ts

@@ -1,7 +1,29 @@
 import * as d3 from 'd3';
-import ForceGraph from 'force-graph';
+
 import type { IdType, NetworkLink, NetworkNode, ReadonlyNetwork } from './Network';
-import type { NetworkRendererOptions, NetworkNodeView, NetworkLinkView } from './NetworkRenderer';
+import type { SimulationLinkDatum, SimulationNodeDatum } from 'd3';
+
+import ForceGraph from 'force-graph';
+import type { NetworkRendererOptions } from './NetworkRendererOptions';
+
+export interface NetworkNodeView extends SimulationNodeDatum {
+  id: IdType;
+  index: number;
+  radius: number;
+  label?: string;
+  details?: string;
+  meta?: any;
+}
+
+export interface NetworkLinkView extends SimulationLinkDatum<NetworkNodeView> {
+  id: IdType;
+  index: number;
+  source: NetworkNodeView;
+  target: NetworkNodeView;
+  label?: string;
+  details?: string;
+  meta?: any;
+}
 
 export class CanvasNetworkRenderer<Node extends NetworkNode, Link extends NetworkLink> {
   private _el: HTMLElement | undefined;