fix(calendar-lab): use local tldraw runtime to avoid react/cdn instance mismatch

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

@@ -1,5 +1,9 @@
 <script setup lang="ts">
 import { computed, onBeforeUnmount, onMounted, ref } from "vue";
+import { createElement } from "react";
+import { createRoot } from "react-dom/client";
+import { Tldraw, createShapeId, toRichText } from "tldraw";
+import "tldraw/tldraw.css";
 
 type TldrawApi = {
   Tldraw: unknown;
@@ -34,15 +38,6 @@ const debugInfo = computed(() => `${LEVEL_LABELS[activeLevel.value] ?? "year"}:
 let reactRoot: { unmount: () => void } | null = null;
 let teardown: (() => void) | null = null;
 
-function ensureTldrawCss() {
-  if (document.querySelector("link[data-tldraw-css='1']")) return;
-  const link = document.createElement("link");
-  link.rel = "stylesheet";
-  link.href = "https://esm.sh/tldraw@4.4.0/tldraw.css";
-  link.setAttribute("data-tldraw-css", "1");
-  document.head.append(link);
-}
-
 function buildScene(api: TldrawApi) {
   const nodes = new Map<string, ShapeNode>();
   const children = new Map<string, string[]>();
@@ -271,17 +266,11 @@ onMounted(async () => {
   try {
     if (!hostRef.value) return;
 
-    ensureTldrawCss();
-
-    const [react, reactDomClient, tldraw] = await Promise.all([
-      import(/* @vite-ignore */ "https://esm.sh/react@18.3.1"),
-      import(/* @vite-ignore */ "https://esm.sh/react-dom@18.3.1/client"),
-      import(/* @vite-ignore */ "https://esm.sh/tldraw@4.4.0?bundle"),
-    ]);
-
-    const createElement = (react as any).createElement as (...args: unknown[]) => unknown;
-    const createRoot = (reactDomClient as any).createRoot as (el: Element) => { render: (node: unknown) => void; unmount: () => void };
-    const api = tldraw as unknown as TldrawApi;
+    const api = {
+      Tldraw,
+      createShapeId,
+      toRichText,
+    } satisfies TldrawApi;
 
     reactRoot = createRoot(hostRef.value);
     reactRoot.render(
@@ -294,7 +283,7 @@ onMounted(async () => {
       }),
     );
   } catch (error) {
-    status.value = "Failed to load tldraw engine from CDN";
+    status.value = "Failed to initialize local tldraw engine";
     console.error(error);
   }
 });