fix some problems

npm/ng-packs/packages/components/chart.js/src/chart.component.ts

@@ -9,7 +9,7 @@ import {
   OnChanges,
   OnDestroy,
   Output,
-  SimpleChanges,
+  SimpleChanges
 } from '@angular/core';
 
 let Chart: any;
@@ -135,6 +135,8 @@ export class ChartComponent implements AfterViewInit, OnDestroy, OnChanges {
   }
 
   ngOnChanges(changes: SimpleChanges) {
+    if (!this.chart) return;
+    
     if (changes.data?.currentValue || changes.options?.currentValue) {
       this.chart.destroy();
       this.initChart();

npm/ng-packs/packages/theme-shared/src/lib/tokens/append-content.token.ts

@@ -1,7 +1,6 @@
 import { CONTENT_STRATEGY, DomInsertionService } from '@abp/ng.core';
 import { inject, InjectionToken } from '@angular/core';
 import styles from '../constants/styles';
-import { chartJsLoaded$ } from '../utils/widget-utils';
 
 export const THEME_SHARED_APPEND_CONTENT = new InjectionToken<void>('THEME_SHARED_APPEND_CONTENT', {
   providedIn: 'root',
@@ -9,7 +8,5 @@ export const THEME_SHARED_APPEND_CONTENT = new InjectionToken<void>('THEME_SHARE
     const domInsertion: DomInsertionService = inject(DomInsertionService);
 
     domInsertion.insertContent(CONTENT_STRATEGY.AppendStyleToHead(styles));
-
-    import('chart.js').then(() => chartJsLoaded$.next(true));
   },
 });