fix(plugin-chart-echarts): support numerical x-axis (#26087)

superset-frontend/plugins/plugin-chart-echarts/src/utils/series.ts

@@ -25,12 +25,12 @@ import {
   DTTM_ALIAS,
   ensureIsArray,
   GenericDataType,
+  LegendState,
+  normalizeTimestamp,
   NumberFormats,
   NumberFormatter,
-  TimeFormatter,
   SupersetTheme,
-  normalizeTimestamp,
-  LegendState,
+  TimeFormatter,
   ValueFormatter,
 } from '@superset-ui/core';
 import { SortSeriesType } from '@superset-ui/chart-controls';
@@ -512,6 +512,9 @@ export function getAxisType(dataType?: GenericDataType): AxisType {
   if (dataType === GenericDataType.TEMPORAL) {
     return AxisType.time;
   }
+  if (dataType === GenericDataType.NUMERIC) {
+    return AxisType.value;
+  }
   return AxisType.category;
 }