feat(e2e): check ELK flowchart

e2e/note_types/mermaid.spec.ts

@@ -0,0 +1,27 @@
+import { test, expect, Page } from "@playwright/test";
+import App from "../support/app";
+
+test("renders ELK flowchart", async ({ page, context }) => {
+    const app = new App(page, context);
+    await app.goto();
+    await app.goToNoteInNewTab("Flowchart ELK on");
+
+    const svgData = app.currentNoteSplit.locator(".mermaid-render svg");
+    await expect(svgData).toMatchAriaSnapshot(`
+      - document:
+        - paragraph: A
+        - paragraph: B
+        - paragraph: C
+        - paragraph: Guarantee
+        - paragraph: User attributes
+        - paragraph: Master data
+        - paragraph: Exchange Rate
+        - paragraph: Profit Centers
+        - paragraph: Vendor Partners
+        - paragraph: Work Situation
+        - paragraph: Customer
+        - paragraph: Profit Centers
+        - paragraph: Guarantee
+        - text: Interfaces for B
+    `);
+});