fix: 因果网络图节点显示中文名(kpi_name)而非编码(kpi_code)

frontend/src/views/KPIDetail.vue

@@ -372,7 +372,7 @@ const networkChartOption = computed(() => {
   if (kpi.value) {
     nodeMap[kpi.value.id] = {
       id: String(kpi.value.id),
-      name: kpi.value.kpi_code,
+      name: kpi.value.kpi_name,
       symbolSize: 50,
       itemStyle: { color: '#409eff' },
       category: 0,
@@ -386,7 +386,7 @@ const networkChartOption = computed(() => {
     if (!nodeMap[item.kpi_id]) {
       nodeMap[item.kpi_id] = {
         id: String(item.kpi_id),
-        name: item.kpi_code,
+        name: item.kpi_name,
         symbolSize: 35,
         itemStyle: { color: '#67c23a' },
         category: 1,
@@ -407,7 +407,7 @@ const networkChartOption = computed(() => {
     if (!nodeMap[item.kpi_id]) {
       nodeMap[item.kpi_id] = {
         id: String(item.kpi_id),
-        name: item.kpi_code,
+        name: item.kpi_name,
         symbolSize: 35,
         itemStyle: { color: '#e6a23c' },
         category: 2,