Enhance Step3Simulation component with dynamic graph memory update feature

- Added 'enable_graph_memory_update' parameter to the simulation start function, allowing for real-time updates of the dynamic graph.
- Included a log message to indicate when dynamic graph update mode is activated, improving user feedback during simulations.

frontend/src/components/Step3Simulation.vue

@@ -388,7 +388,8 @@ const doStartSimulation = async () => {
     const params = {
       simulation_id: props.simulationId,
       platform: 'parallel',
-      force: true  // 强制重新开始
+      force: true,  // 强制重新开始
+      enable_graph_memory_update: true  // 开启动态图谱更新
     }
     
     if (props.maxRounds) {
@@ -396,6 +397,8 @@ const doStartSimulation = async () => {
       addLog(`设置最大模拟轮数: ${props.maxRounds}`)
     }
     
+    addLog('已开启动态图谱更新模式')
+    
     const res = await startSimulation(params)
     
     if (res.success && res.data) {