feat(components): HtmlElementEvent type and canvas testing

src/components/board.vue

@@ -0,0 +1,18 @@
+<script setup lang="ts">
+const canvas = ref<HTMLCanvasElement | null>(null);
+
+onMounted(() => {
+  if (!canvas.value) return;
+
+  const ctx = canvas.value.getContext("2d");
+
+  if (!ctx) return;
+
+  ctx.fillStyle = "red";
+  ctx.fillRect(0, 0, Math.random() * 100, Math.random() * 100);
+});
+</script>
+
+<template>
+  <canvas ref="canvas" />
+</template>