fix: suppress mermaid error overlay

desktop/src/components/chat/MermaidRenderer.test.tsx

@@ -30,6 +30,9 @@ describe('MermaidRenderer', () => {
 
     const previewButton = await screen.findByRole('button', { name: /preview/i })
     expect(previewButton).toBeInTheDocument()
+    expect(initializeMock).toHaveBeenCalledWith(expect.objectContaining({
+      suppressErrorRendering: true,
+    }))
 
     fireEvent.click(previewButton)
 

desktop/src/components/chat/MermaidRenderer.tsx

@@ -32,6 +32,7 @@ function initMermaid() {
     startOnLoad: false,
     theme: 'default',
     securityLevel: 'strict',
+    suppressErrorRendering: true,
     fontFamily: 'var(--font-sans)',
   })
   mermaidInitialized = true