feat: 拖拽时节点重排

frontend/src/config/layout.ts

@@ -1,18 +1,17 @@
 import type { GraphLayoutConfig } from '../types/graph';
 
-// 支持的布局类型（仅保留 force 力导向布局）
-export const SUPPORTED_LAYOUTS = ['force'] as const;
+// 支持的布局类型（保留 d3-force 力导向布局）
+export const SUPPORTED_LAYOUTS = ['d3-force'] as const;
 
 // 力导向布局默认配置
 export const FORCE_LAYOUT_CONFIG = {
-  type: 'force' as const,
-  nodeSize: 60,
-  preventOverlap: true,
-  linkDistance: 150,
+  type: 'd3-force' as const,
+  collide: { radius: 60 } as const,
+  link: { distance: 150 } as const,
 };
 
 // 默认布局配置
 export const DEFAULT_LAYOUT: GraphLayoutConfig = FORCE_LAYOUT_CONFIG;
 
 // 图谱交互行为配置
-export const GRAPH_BEHAVIORS = ['drag-canvas', 'zoom-canvas', 'drag-element'];
+export const GRAPH_BEHAVIORS = ['drag-canvas', 'zoom-canvas', 'drag-element-force'];

frontend/src/types/graph.ts

@@ -50,13 +50,14 @@ export interface GraphData {
 
 /**
  * 图谱布局配置
- * 目前仅支持 force 力导向布局
+ * 支持 force 力导向布局和 d3-force 力导向布局
  */
 export interface GraphLayoutConfig {
-  type: 'force';
+  type: 'force' | 'd3-force';
   nodeSize?: number;
   linkDistance?: number;
   center?: [number, number];
+  collide?: { radius: number; strength?: number };
 }
 
 /**