feat(calendar-lab): switch demo route to tldraw canvas preview

frontend/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+const tldrawUrl = "https://www.tldraw.com";
+</script>
+
+<template>
+  <section class="tldraw-lab-root">
+    <div class="tldraw-lab-toolbar">
+      <p class="tldraw-lab-title">tldraw demo (infinite canvas)</p>
+      <a
+        class="btn btn-xs btn-outline"
+        :href="tldrawUrl"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        Open in new tab
+      </a>
+    </div>
+
+    <iframe
+      class="tldraw-lab-frame"
+      :src="tldrawUrl"
+      title="tldraw demo"
+      loading="lazy"
+      referrerpolicy="no-referrer"
+      allowfullscreen
+    />
+  </section>
+</template>
+
+<style scoped>
+.tldraw-lab-root {
+  height: calc(100dvh - 1rem);
+  min-height: 640px;
+  border-radius: 14px;
+  border: 1px solid color-mix(in oklab, var(--color-base-content) 20%, transparent);
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  background: color-mix(in oklab, var(--color-base-100) 95%, transparent);
+}
+
+.tldraw-lab-toolbar {
+  height: 42px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 0 10px;
+  border-bottom: 1px solid color-mix(in oklab, var(--color-base-content) 16%, transparent);
+  background: color-mix(in oklab, var(--color-base-100) 94%, transparent);
+}
+
+.tldraw-lab-title {
+  font-size: 0.78rem;
+  color: color-mix(in oklab, var(--color-base-content) 72%, transparent);
+}
+
+.tldraw-lab-frame {
+  width: 100%;
+  height: calc(100% - 42px);
+  border: 0;
+}
+</style>