test: probe informational Codecov status

codecov.yml

@@ -1,3 +1,9 @@
+coverage:
+  status:
+    patch:
+      default:
+        informational: true
+
 comment:
   layout: 'header, diff, flags, files'
   behavior: default

src/components/ui/chart/useChart.ts

@@ -132,7 +132,7 @@ export function useChart(
   const chartInstance = ref<Chart | null>(null)
 
   function createChart() {
-    if (!canvasRef.value) return
+    if (canvasRef.value === null) return
 
     chartInstance.value?.destroy()