Remove append to to show overlays

src/components/chart/state-history-chart-line.ts

@@ -305,7 +305,8 @@ export class StateHistoryChartLine extends LitElement {
         visualMap: this._visualMap,
         tooltip: {
           trigger: "axis",
-          appendTo: document.body,
+          position: "bottom",
+          align: "center",
           formatter: this._renderTooltip,
         },
       };

src/components/chart/state-history-chart-timeline.ts

@@ -255,7 +255,8 @@ export class StateHistoryChartTimeline extends LitElement {
         right: rtl ? labelWidth : 1,
       },
       tooltip: {
-        appendTo: document.body,
+        position: "bottom",
+        align: "center",
         formatter: this._renderTooltip,
       },
     };

src/components/chart/statistics-chart.ts

@@ -335,7 +335,8 @@ export class StatisticsChart extends LitElement {
       },
       tooltip: {
         trigger: "axis",
-        appendTo: document.body,
+        position: "bottom",
+        align: "center",
         formatter: this._renderTooltip,
       },
     };