Add Playwright e2e coverage and Node 20 pin

frontend/e2e/shares.spec.ts

@@ -0,0 +1,46 @@
+import { expect, test } from '@playwright/test'
+import {
+  createAuthenticatedApiContext,
+  createSession,
+  createSessionShare,
+  createTroubleshootingTree,
+  disposeApiContext,
+  uniqueName,
+} from './helpers/api'
+
+test.describe('shared session management smoke tests', () => {
+  test('created shares appear in exports and can be revoked', async ({ page }) => {
+    const api = await createAuthenticatedApiContext()
+    const tree = await createTroubleshootingTree(api, {
+      name: uniqueName('Playwright Exports Flow'),
+    })
+    const session = await createSession(api, tree.id, {
+      ticket_number: `PW-EXPORTS-${Date.now()}`,
+      client_name: 'Exports Client',
+    })
+    const share = await createSessionShare(api, session.id, {
+      visibility: 'public',
+      share_name: uniqueName('Playwright Exports Share'),
+    })
+
+    try {
+      await page.goto('/shares')
+
+      await expect(
+        page.getByRole('heading', { name: 'My Shared Sessions' }),
+      ).toBeVisible()
+      await expect(page.getByText(share.share_name || '')).toBeVisible()
+
+      const shareCard = page.locator('.bg-card').filter({ hasText: share.share_name || '' }).first()
+      await shareCard.getByRole('button', { name: 'Revoke' }).click()
+
+      const confirmDialog = page.getByRole('dialog', { name: 'Revoke Share Link' })
+      await expect(confirmDialog).toBeVisible()
+      await confirmDialog.getByRole('button', { name: 'Revoke' }).click()
+
+      await expect(page.getByText(share.share_name || '')).not.toBeVisible()
+    } finally {
+      await disposeApiContext(api)
+    }
+  })
+})