add latest

src/composables/mermaid.ts

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+import { onMounted } from 'vue';
+import mermaid from 'mermaid';
+
+export function initialiseMermaid() {
+  onMounted(() => {
+    mermaid.initialize({
+      startOnLoad: false,
+      logLevel: 'fatal',
+      securityLevel: 'loose',
+      theme: 'neutral',
+      flowchart: { htmlLabels: true }
+    });
+  });
+}