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>

.gitignore

@@ -45,3 +45,9 @@ Thumbs.db
 
 *storybook.log
 storybook-static
+
+# Playwright e2e
+/test-results
+/playwright-report
+/blob-report
+/playwright/.cache