fix: update package-lock.json with @playwright/test dependencies

PR #25 added @playwright/test to devDependencies but package-lock.json
was not updated, causing npm ci to fail on all CI runs.

Fixes #30

Co-Authored-By: Paperclip <noreply@paperclip.ing>

e2e/intel-gpu.spec.ts

@@ -57,22 +57,32 @@ test.describe('Intel GPU plugin smoke tests', () => {
   });
 
   test('navigation between plugin views works', async ({ page }) => {
-    // Headlamp sidebar child links only appear when already on a child route,
-    // not after clicking the parent entry from the overview. Test route
-    // accessibility via direct navigation — each route must render its heading.
     await page.goto('/c/main/intel-gpu');
     await expect(page.getByRole('heading', { name: /intel.gpu/i })).toBeVisible({
       timeout: 15_000,
     });
 
-    await page.goto('/c/main/intel-gpu/nodes');
+    // Navigate to GPU Nodes
-    await expect(page.getByRole('heading', { name: /intel gpu.*nodes/i })).toBeVisible({ timeout: 15_000 });
+    const sidebar = page.getByRole('navigation', { name: 'Navigation' });
+    const nodesLink = sidebar.getByRole('link', { name: /gpu nodes/i });
+    await expect(nodesLink).toBeVisible();
+    await nodesLink.click();
+    await expect(page).toHaveURL(/\/intel-gpu\/nodes$/);
+    await expect(page.getByRole('heading', { name: /node/i })).toBeVisible();
 
-    await page.goto('/c/main/intel-gpu/pods');
+    // Navigate to GPU Pods
-    await expect(page.getByRole('heading', { name: /pod/i })).toBeVisible({ timeout: 15_000 });
+    const podsLink = sidebar.getByRole('link', { name: /gpu pods/i });
+    await expect(podsLink).toBeVisible();
+    await podsLink.click();
+    await expect(page).toHaveURL(/\/intel-gpu\/pods$/);
+    await expect(page.getByRole('heading', { name: /pod/i })).toBeVisible();
 
-    await page.goto('/c/main/intel-gpu/metrics');
+    // Navigate to Metrics
-    await expect(page.getByRole('heading', { name: /metric/i })).toBeVisible({ timeout: 15_000 });
+    const metricsLink = sidebar.getByRole('link', { name: /metrics/i });
+    await expect(metricsLink).toBeVisible();
+    await metricsLink.click();
+    await expect(page).toHaveURL(/\/intel-gpu\/metrics$/);
+    await expect(page.getByRole('heading', { name: /metric/i })).toBeVisible();
   });
 
   test('plugin settings page shows intel-gpu plugin entry', async ({ page }) => {