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>

package-lock.json

@@ -27,6 +27,7 @@
         "@angular/localize": "^22.0.4",
         "@angular/platform-browser-dynamic": "^22.0.0",
         "@compodoc/compodoc": "^1.2.1",
+        "@playwright/test": "^1.61.1",
         "@storybook/addon-a11y": "^10.4.6",
         "@storybook/addon-docs": "^10.4.6",
         "@storybook/addon-onboarding": "^10.4.6",
@@ -8451,6 +8452,22 @@
         "url": "https://opencollective.com/pkgr"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.61.1",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.61.1.tgz",
+      "integrity": "sha512-8nKv6+0RJSL9FE4jYOEGXnPeM/Hg12qZpmqzZjRh3qM0Y7c3z1mrOTfFLids72RDQYVh9WpLEfR5WdpNX4fkig==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.61.1"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@polka/send-type": {
       "version": "0.5.2",
       "resolved": "https://registry.npmjs.org/@polka/send-type/-/send-type-0.5.2.tgz",