Add Vitest coverage for erasure lanes, fleet evolution UI, and spread routes.

Cover Path Tracer RS lane hints, Calibrate erasure toggle, fleet role chips, atlas skips panel, and erasure_lanes help copy.

server/web/src/components/Fleet/AccessDepthPanel.test.tsx

@@ -200,6 +200,20 @@ describe('AccessDepthPanel', () => {
     expect(screen.getByText(/confidence 72%/i)).toBeInTheDocument();
   });
 
+  it('renders atlas skips block when failure atlas hard-skips tiers', async () => {
+    renderPanel(
+      mockAgent({ platform: 'windows', status: 'online' }),
+      parseAccessDepthDiagnostics({
+        tier_chain_order: ['exe_subprocess', 'ps_inmemory', 'cpu_inprocess'],
+        atlas_skips: [
+          { tier: 'ps_inmemory', condition: 'defender_on', reason: '5 failures with Defender on' },
+        ],
+      }),
+    );
+    expect(await screen.findByText('Atlas skips')).toBeInTheDocument();
+    expect(screen.getByText(/ps inmemory \(Defender on\)/i)).toBeInTheDocument();
+  });
+
   it('shows spread genealogy lineage when watermark present', async () => {
     renderPanel(
       mockAgent({