Merge pull request #6265 from dataease/pr@dev@fix_antv_line_time_legend_lost

fix: 维度为时间格式时图例显示不全#6253

core/frontend/src/views/chart/chart/line/line_antv.js

@@ -31,6 +31,9 @@ export function baseLineOptionAntV(plot, container, chart, action) {
   const analyse = getAnalyse(chart)
   // options
   const options = {
+    meta: {
+      category: 'cat'
+    },
     point: {},
     theme: theme,
     data: data,