fix: resolve Playwright test failures — DOM cleanup and aria-label HTML stripping

- Fix test cleanup: removeChild was called on already-removed container
  after loop, causing NotFoundError in CI
- Fix NodeCard aria-label: use regex to strip HTML tags from label so
  aria-label contains plain text only (e.g. 'SFO Edge Router' not
  '<b>SFO</b> Edge Router')

Author: jobbykings

src/components/network/NodeCard.tsx

@@ -149,7 +149,7 @@ export function NodeCard({
       }}
       role="button"
       tabIndex={0}
-      aria-label={`Node: ${node.label ?? node.id}`}
+      aria-label={`Node: ${(node.label ?? node.id).replace(/<[^>]*>/g, '')}`}
     >
       {/* Header */}
       <div className="flex items-start justify-between gap-3 border-b border-[#ece5d8] px-4 py-3">

tests/e2e/xss-sanitization.spec.ts

@@ -110,8 +110,6 @@ test.describe("XSS Sanitization — NodeCard rendering", () => {
         document.body.removeChild(container);
       }
 
-      // Final cleanup
-      document.body.removeChild(container);
       window.__XSS_TEST__ = false;
 
       return results;