feat(calendar): add nested zoom lab page with four persistent levels

frontend/app/components/workspace/calendar/lab/CrmCalendarLabWeekRect.vue

@@ -0,0 +1,34 @@
+<script setup lang="ts">
+defineProps<{
+  isActive: boolean;
+  isLoading: boolean;
+  isLoaded: boolean;
+  pulseScale: number;
+}>();
+</script>
+
+<template>
+  <section
+    class="calendar-lab-rect calendar-lab-week"
+    :class="isActive ? 'calendar-lab-rect-active' : ''"
+    :style="{ transform: `scale(${pulseScale})` }"
+  >
+    <header class="calendar-lab-header">
+      <p class="calendar-lab-title">Week</p>
+      <p class="calendar-lab-subtitle">7 day columns</p>
+    </header>
+
+    <p v-if="isLoading" class="calendar-lab-loading">Loading GraphQL week payload…</p>
+    <p v-else-if="isLoaded" class="calendar-lab-meta">Data ready</p>
+
+    <div class="calendar-lab-grid-week">
+      <span
+        v-for="day in 7"
+        :key="`lab-week-day-${day}`"
+        class="calendar-lab-day"
+      >
+        D{{ day }}
+      </span>
+    </div>
+  </section>
+</template>