Fixed #955 - Chart.js gives Chart is not a contructor

src/components/chart/Chart.vue

@@ -5,8 +5,6 @@
 </template>
 
 <script>
-import * as Chart from 'chart.js';
-
 export default {
     emits: ['select'],
     props: {
@@ -45,11 +43,15 @@ export default {
     },
     methods: {
         initChart() {
-            this.chart = new Chart(this.$refs.canvas, {
+            import('chart.js').then((module) => {
+                if (module && module.default) {
+                    this.chart = new module.default(this.$refs.canvas, {
                         type: this.type,
                         data: this.data,
                         options: this.options
                     });
+                }
+            });
         },
         getCanvas() {
             return this.$canvas;