Make Website Scanner discoverable in sidebar nav.

Deploy Recon was wired at /deploy-recon but buried at the bottom of a non-scrolling sidebar under an opaque label; move it after Crucible, rename to Website Scanner, enable nav scroll, and add route/nav smoke tests plus README.

server/web/src/components/Layout/Layout.nav.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from 'vitest';
+import { operatorNavItems } from './Layout';
+
+describe('operator sidebar nav', () => {
+  it('includes Website Scanner linking to /deploy-recon', () => {
+    const item = operatorNavItems.find((i) => i.to === '/deploy-recon');
+    expect(item).toBeDefined();
+    expect(item!.label).toBe('Website Scanner');
+    expect(item!.icon).toBe('recon');
+  });
+
+  it('places Website Scanner directly after Crucible for discoverability', () => {
+    const scannerIdx = operatorNavItems.findIndex((i) => i.to === '/deploy-recon');
+    const crucibleIdx = operatorNavItems.findIndex((i) => i.to === '/crucible');
+    expect(scannerIdx).toBe(crucibleIdx + 1);
+  });
+});