fix(图表): 修复堆叠折线图控制处理，保持为空时，空值处不应该有点位的问题

core/core-frontend/src/views/chart/components/js/panel/charts/g2/line/area.ts

@@ -25,6 +25,8 @@ import {
   getLineConditionLineYMarks,
   getLineTooltipSameDimensionItems,
   bindLineLegendState,
+  configBreakLineStackMark,
+  filterBreakLinePointMark,
   LINE_AXIS_TYPE,
   LINE_CONDITION_VISIBLE_DOMAIN_KEY,
   LINE_EDITOR_PROPERTY,
@@ -778,7 +780,7 @@ export class Area extends G2ChartView {
   protected configEmptyDataStrategy(chart: Chart, options: G2Spec): G2Spec {
     const { functionCfg } = parseJson(chart.senior)
     const { emptyDataStrategy } = functionCfg
-    const [areaMark, lineMark] = options.children
+    const [areaMark, lineMark, pointMark] = options.children
     const data = options.data.value
     const multiDimension = chart.yAxis?.length > 1
     switch (emptyDataStrategy) {
@@ -788,6 +790,7 @@ export class Area extends G2ChartView {
         }
         merge(areaMark, { style: { connect: false } })
         merge(lineMark, { style: { connect: false } })
+        filterBreakLinePointMark(pointMark)
         break
       }
       case 'ignoreData': {
@@ -985,7 +988,8 @@ export class StackArea extends Area {
                   customAttr.basicStyle?.gradient ? setGradientColor(color, true, 270) : color
               )
             ).forEach(item => {
-              if (item.value === null || item.value === undefined) {
+              // 堆叠断线数据视图以 NaN 保留空坐标，tooltip 仍按空值隐藏
+              if (item.value === null || item.value === undefined || Number.isNaN(item.value)) {
                 return
               }
               const value = valueFormatter(item.value, tooltipAttr.tooltipFormatter)
@@ -1023,7 +1027,7 @@ export class StackArea extends Area {
   protected configEmptyDataStrategy(chart: Chart, options: G2Spec): G2Spec {
     const { functionCfg } = parseJson(chart.senior)
     const { emptyDataStrategy } = functionCfg
-    const [areaMark, lineMark] = options.children
+    const [areaMark, lineMark, pointMark] = options.children
     const data = options.data.value
     const multiDimension = chart.yAxis?.length > 1 || chart.extStack?.length > 0
     switch (emptyDataStrategy) {
@@ -1033,6 +1037,10 @@ export class StackArea extends Area {
         }
         merge(areaMark, { style: { connect: false } })
         merge(lineMark, { style: { connect: false } })
+        configBreakLineStackMark(areaMark, data)
+        configBreakLineStackMark(lineMark, data)
+        // stackY 将原始值保存在 y0，需据此识别被堆叠坐标转换的空值
+        filterBreakLinePointMark(pointMark, 'y0')
         break
       }
       case 'ignoreData': {

core/core-frontend/src/views/chart/components/js/panel/charts/g2/line/common.ts

@@ -85,6 +85,30 @@ export type LineLegendState = {
   visibleSeries?: ReadonlySet<string>
 }
 
+const isEmptyLineValue = (value: unknown) => value === null || value === undefined
+
+export const filterBreakLinePointMark = (pointMark: G2Spec, valueChannel: 'y' | 'y0' = 'y') => {
+  // point 独立过滤空值，保留父级数据的断线语义和真实 0
+  const filter =
+    valueChannel === 'y0'
+      ? { type: 'filter' as const, y0: (value: unknown) => !isEmptyLineValue(value) }
+      : { type: 'filter' as const, y: (value: unknown) => !isEmptyLineValue(value) }
+  pointMark.transform = [...(pointMark.transform ?? []), filter]
+}
+
+export const configBreakLineStackMark = (mark: G2Spec, data: Record<string, any>[]) => {
+  // 仅在 mark 数据视图中保留空坐标，避免 stackY 将空值数值化为 0
+  mark.data = {
+    value: data,
+    transform: [
+      {
+        type: 'map',
+        callback: item => (isEmptyLineValue(item.value) ? { ...item, value: Number.NaN } : item)
+      }
+    ]
+  }
+}
+
 export const bindLineLegendState = (chartObj: G2Chart): LineLegendState => {
   const state: LineLegendState = {}
   chartObj.on('legend:filter', event => {

core/core-frontend/src/views/chart/components/js/panel/charts/g2/line/line.ts

@@ -23,6 +23,7 @@ import {
   getLineConditionLineYMarks,
   getLineTooltipSameDimensionItems,
   bindLineLegendState,
+  filterBreakLinePointMark,
   LINE_AXIS_TYPE,
   LINE_CONDITION_VISIBLE_DOMAIN_KEY,
   LINE_EDITOR_PROPERTY,
@@ -821,7 +822,7 @@ export class Line extends G2ChartView {
   protected configEmptyDataStrategy(chart: Chart, options: G2Spec): G2Spec {
     const { functionCfg } = parseJson(chart.senior)
     const { emptyDataStrategy } = functionCfg
-    const [lineMark] = options.children
+    const [lineMark, pointMark] = options.children
     const data = options.data.value
     const multiDimension = chart.yAxis?.length > 1 || chart.xAxisExt?.length > 0
     switch (emptyDataStrategy) {
@@ -830,6 +831,7 @@ export class Line extends G2ChartView {
           handleBreakLineMultiDimension(data)
         }
         merge(lineMark, { style: { connect: false } })
+        filterBreakLinePointMark(pointMark)
         break
       }
       case 'ignoreData': {