fix: 图谱按顶层分组固定坐标布局，节点不再挤压

apps/desktop/src/renderer/features/graph/GraphView.tsx

@@ -1,38 +1,80 @@
 import { useEffect, useRef, useState } from 'react';
 import { Graph } from '@antv/g6';
 import { invoke } from '../../ipc-client';
-import { IPC } from '@hunter/shared';
-import type { GraphData } from '@hunter/shared';
+import { IPC, type GraphData, type GraphNode } from '@hunter/shared';
 import { useStore } from '../../store';
 
+// 按顶层分组固定坐标布局：每组一列，组内纵向排开，间距充足（FR-G2 组内分行排布）
+function layoutNodes(nodes: GraphNode[], width: number, height: number) {
+  const groups = new Map<string, GraphNode[]>();
+  nodes.forEach(n => { const a = groups.get(n.group) ?? []; a.push(n); groups.set(n.group, a); });
+  const groupList = [...groups.entries()];
+  const colWidth = groupList.length > 0 ? width / groupList.length : width;
+  const positions = new Map<string, { x: number; y: number }>();
+  groupList.forEach(([group, items], gi) => {
+    const colX = colWidth * gi + colWidth / 2;
+    const rowGap = Math.min(80, height / Math.max(items.length, 1));
+    const startY = height / 2 - (items.length * rowGap) / 2 + rowGap / 2;
+    items.forEach((n, ni) => positions.set(n.id, { x: colX, y: startY + ni * rowGap }));
+  });
+  return positions;
+}
+
 export function GraphView() {
   const containerRef = useRef<HTMLDivElement>(null);
   const [graph, setGraph] = useState<Graph | null>(null);
   const { openDoc } = useStore();
+  const sizeRef = useRef({ w: 800, h: 600 });
 
   useEffect(() => {
     if (!containerRef.current) return;
+    const el = containerRef.current;
+    const updateSize = () => { sizeRef.current = { w: el.clientWidth || 800, h: el.clientHeight || 600 }; };
+    updateSize();
+    const ro = new ResizeObserver(updateSize);
+    ro.observe(el);
     const g = new Graph({
-      container: containerRef.current,
-      width: containerRef.current.clientWidth,
-      height: containerRef.current.clientHeight,
-      layout: { type: 'force', preventOverlap: true, nodeStrength: -50, linkDistance: 120 } as any,
-      node: { style: { size: 20, fill: (d: any) => d.color || '#4a9eff', labelText: (d: any) => d.title, labelFill: '#ddd' } } as any,
-      edge: { style: { stroke: '#555' } } as any,
+      container: el,
+      width: sizeRef.current.w,
+      height: sizeRef.current.h,
+      autoResize: true,
+      layout: { type: 'grid' } as any,
+      node: {
+        style: {
+          size: 28,
+          fill: (d: any) => d.color || '#4a9eff',
+          labelText: (d: any) => truncate(d.title, 10),
+          labelFill: '#ddd',
+          labelFontSize: 11,
+          labelPlacement: 'bottom',
+          labelOffsetY: 4,
+        }
+      } as any,
+      edge: { style: { stroke: '#555', lineWidth: 1, endArrow: true } } as any,
       behaviors: ['zoom-canvas', 'drag-canvas', 'drag-element'],
     });
     setGraph(g);
-    return () => { g.destroy(); };
+    return () => { ro.disconnect(); g.destroy(); };
   }, []);
 
   useEffect(() => {
     if (!graph) return;
     invoke(IPC.graph, undefined as never).then((data: GraphData) => {
-      graph.setData({ nodes: data.nodes.map(n => ({ id: n.id, ...n })), edges: data.edges.map(e => ({ source: e.source, target: e.target })) } as any);
+      const pos = layoutNodes(data.nodes, sizeRef.current.w, sizeRef.current.h);
+      graph.setData({
+        nodes: data.nodes.map(n => ({ id: n.id, x: pos.get(n.id)!.x, y: pos.get(n.id)!.y, style: { fill: n.color }, data: { title: n.title, star: n.star } })),
+        edges: data.edges.map(e => ({ source: e.source, target: e.target })),
+      } as any);
       graph.render();
     });
     graph.on('node:click', (e: any) => { openDoc(e.target.id); });
   }, [graph]);
 
-  return <div ref={containerRef} style={{ flex: 1, background: '#111' }} />;
+  return (
+    <div style={{ flex: 1, background: '#111', position: 'relative', overflow: 'hidden' }}>
+      <div ref={containerRef} style={{ position: 'absolute', inset: 0 }} />
+    </div>
+  );
 }
+
+function truncate(s: string, n: number) { return s.length > n ? s.slice(0, n) + '…' : s; }