feat(visualizer): 增加可渲染节点和边的最大限制，提高图形处理能力

src/api/templates/visualizer.html

@@ -1028,8 +1028,8 @@
             console.log(`准备更新图形: ${nodeCount} 个节点, ${edgeCount} 条边`);
 
             // 对于超大数据集，进一步限制
-            const MAX_RENDERABLE_NODES = 5000;
-            const MAX_RENDERABLE_EDGES = 10000;
+            const MAX_RENDERABLE_NODES = 10000;
+            const MAX_RENDERABLE_EDGES = 20000;
             
             let nodesToRender = data.nodes;
             let edgesToRender = data.edges;