feat(dees-chart-area): add full page toggle control for chart area

ts_web/elements/00group-chart/dees-chart-area/template.ts

@@ -1,9 +1,16 @@
 import { html, type TemplateResult } from '@design.estate/dees-element';
 import type { DeesChartArea } from './component.js';
+import '../../00group-utility/dees-icon/dees-icon.js';
 
 export const renderChartArea = (component: DeesChartArea): TemplateResult => {
       return html`
-        <dees-tile .heading=${component.label}>
+        <dees-tile>
+          <div slot="header" class="chartHeader">
+            <span class="chartLabel">${component.label}</span>
+            <button class="expandBtn" @click=${() => component.toggleFullPage()} title="${component.isFullPage ? 'Exit full page' : 'Full page'}">
+              <dees-icon .icon=${component.isFullPage ? 'lucide:Minimize2' : 'lucide:Maximize2'} .iconSize=${14}></dees-icon>
+            </button>
+          </div>
           <div class="chartContainer"></div>
           ${component.seriesStats.length > 0 ? html`
             <div slot="footer" class="statsBar">