feat(fp): WP-19 — Playwright e2e smoke against the real FE+backend

Adds a happy-path spec (login → dashboard → registratie wizard, including
a real identity-document upload → real submit) and a degraded-path spec
(?scenario=error → <app-async> error slot → retry), both driving the real
app against the real .NET backend, plus a CI job that boots both.

Writing the retry spec surfaced a real bug: AsyncComponent's retry() only
reloads a [resource]-fed instance, so every real page (all [data]-fed via
a store's RemoteData) had a silently no-op retry button. Added a
retryClicked output and wired it on the dashboard's two async blocks.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

e2e/smoke.spec.ts

@@ -0,0 +1,59 @@
+import { expect, test } from '@playwright/test';
+
+// One happy-path flow through the real FE+backend: log in, land on the real
+// dashboard, run the registratie wizard's minimum required path (a DUO diploma
+// with zero policy questions, so the only required upload is identiteit), submit,
+// and see the real confirmation. Not a full wizard-coverage suite — see WP-19.
+//
+// The backend is in-memory and shared across runs; this test mutates real state
+// (creates a registratie application for the fixed demo identity). Restart the
+// backend between CI runs — a second run would see a leftover Concept/submitted
+// application on the dashboard, which this test doesn't assert against, but a
+// stricter future test might.
+test('login → dashboard → registratie wizard → submitted', async ({ page }) => {
+  await page.goto('/login');
+  await page.getByLabel('BSN').fill('123456789');
+  await page.getByLabel('Wachtwoord').fill('demo');
+  await page.getByRole('button', { name: 'Inloggen met DigiD' }).click();
+
+  await expect(page).toHaveURL(/\/dashboard$/);
+  await expect(page.getByRole('heading', { level: 1, name: 'Mijn overzicht' })).toBeVisible();
+  // Real backend content, not a loading/error state.
+  await expect(page.getByText('Persoonsgegevens (BRP)')).toBeVisible();
+
+  await page.goto('/registreren');
+  await expect(
+    page.getByRole('heading', { level: 1, name: 'Inschrijven in het BIG-register' }),
+  ).toBeVisible();
+
+  // Step 1 — adres: BRP prefill is real backend data; "Post" skips the email field.
+  // The CIBG-styled radio hides the native input behind its label, so click the
+  // label (real user interaction) rather than `.check()` the covered input.
+  await expect(page.getByText('Vooraf ingevuld op basis van de BRP')).toBeVisible();
+  await page.locator('label[for="correspondentie-post"]').click();
+  await page.locator('button[type="submit"]').click();
+
+  // Step 2 — beroep: the first DUO diploma (Geneeskunde, non-English) carries zero
+  // policy questions, so the only required document is identiteit.
+  await expect(page.locator('#diploma-d1')).toBeVisible({ timeout: 10_000 });
+  await page.locator('label[for="diploma-d1"]').click();
+  await expect(page.getByText('Beroep (afgeleid uit diploma)')).toBeVisible();
+
+  await page.locator('#identiteit-file').setInputFiles({
+    name: 'identiteit.pdf',
+    mimeType: 'application/pdf',
+    buffer: Buffer.from('%PDF-1.4 fake e2e fixture'),
+  });
+  // Real upload against the backend: wait for the row to leave "uploading".
+  await expect(page.locator('.upload-progress')).toHaveCount(0, { timeout: 10_000 });
+  await expect(page.locator('.icon-remove')).toBeVisible();
+
+  await page.locator('button[type="submit"]').click();
+
+  // Step 3 — controle: review + real submit.
+  await expect(page.getByText('Controleer uw gegevens en dien de registratie in.')).toBeVisible();
+  await page.locator('button[type="submit"]').click();
+
+  await expect(page.getByText('Uw registratie is ontvangen')).toBeVisible({ timeout: 10_000 });
+  await expect(page.getByText(/Uw referentienummer is/)).toBeVisible();
+});