Rijkshuisstijl restyle + wizard fixes

Chrome: two-tier Rijksoverheid header (white brand bar + lint-blue
breadcrumb bar, route-driven), dark multi-column footer, white page
surface. Session shown via a shared SESSION_PORT token (keeps shared/
free of the auth context).

Overview ("Mijn overzicht") rebuilt to the NL Design System #392 pattern:
side-nav + "Wat moet ik regelen" task list (derived) + "Mijn registratie"
cards. New shared components: card, task-list, side-nav; pure
tasksFromProfile (+spec).

Wizards: grey form panel, connected numbered stepper, form-field
"(verplicht)" markers + styled description/error, full-width inputs.
Propagated to login, detail, change-request, address-fields.

Bug fixes:
- wizard-shell: add FormsModule so NgForm intercepts submit (wizards now
  advance; no native GET leaking choices into the URL).
- wizard-shell: error-summary links focus the field instead of navigating
  (a fragment href resolved against <base href="/"> reloaded to "/" and
  bounced to login).
- wizard-shell: error-summary focus only on the rising edge, so typing
  while errors are shown no longer scrolls the page up.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/shared/layout/site-footer/site-footer.component.ts

@@ -1,20 +1,39 @@
 import { Component } from '@angular/core';
 
-/** Organism: site footer. */
+/** Organism: Rijksoverheid-style site footer — dark-blue, with the
+    "De Rijksoverheid. Voor Nederland." tagline, responsible-ministry attribution,
+    and a small "Over deze site" link column. ponytail: links point at the real
+    rijksoverheid.nl pages, not a fabricated dead-link forest. */
 @Component({
   selector: 'app-site-footer',
   styles: [`
     :host{display:block}
-    .bar{background:var(--rhc-color-donkerblauw-700);color:var(--rhc-color-wit);margin-block-start:var(--rhc-space-max-5xl);inline-size:100%}
-    .inner{max-inline-size:var(--app-content-max);margin-inline:auto;padding:var(--rhc-space-max-2xl);display:flex;gap:var(--rhc-space-max-3xl);flex-wrap:wrap;box-sizing:border-box}
-    .end{margin-inline-start:auto}
+    .bar{background:var(--rhc-color-donkerblauw-700);color:var(--rhc-color-foreground-on-primary);margin-block-start:var(--rhc-space-max-5xl);inline-size:100%}
+    .inner{max-inline-size:var(--app-content-max);margin-inline:auto;padding:var(--rhc-space-max-3xl) var(--rhc-space-max-2xl);box-sizing:border-box;display:flex;gap:var(--rhc-space-max-3xl);flex-wrap:wrap;justify-content:space-between}
+    .tagline{font-style:italic;font-weight:var(--rhc-text-font-weight-semi-bold);font-size:var(--rhc-text-font-size-lg);max-inline-size:18rem}
+    .ministry{margin-block-start:var(--rhc-space-max-md);font-size:var(--rhc-text-font-size-sm);color:var(--rhc-color-foreground-on-primary)}
+    .col h2{margin:0 0 var(--rhc-space-max-md);font-size:var(--rhc-text-font-size-sm);font-weight:var(--rhc-text-font-weight-bold);text-transform:uppercase;letter-spacing:.04em}
+    .links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--rhc-space-max-sm);font-size:var(--rhc-text-font-size-sm)}
+    .links a{color:var(--rhc-color-foreground-on-primary);text-decoration:none}
+    .links a:hover{text-decoration:underline}
+    .meta{inline-size:100%;border-block-start:var(--rhc-border-width-sm) solid var(--rhc-color-lintblauw-600);margin-block-start:var(--rhc-space-max-xl);padding-block-start:var(--rhc-space-max-lg);font-size:var(--rhc-text-font-size-sm);opacity:.85}
   `],
   template: `
     <footer class="utrecht-page-footer bar">
       <div class="inner">
-        <span>BIG-register</span>
-        <span>CIBG — Ministerie van Volksgezondheid, Welzijn en Sport</span>
-        <span class="end">Demo / POC — geen echte gegevens</span>
+        <div>
+          <div class="tagline">De Rijksoverheid. Voor Nederland.</div>
+          <div class="ministry">CIBG — Ministerie van Volksgezondheid, Welzijn en Sport</div>
+        </div>
+        <nav class="col" aria-label="Over deze site">
+          <h2>Over deze site</h2>
+          <ul class="links">
+            <li><a href="https://www.rijksoverheid.nl/privacy" rel="noopener" target="_blank">Privacy</a></li>
+            <li><a href="https://www.rijksoverheid.nl/cookies" rel="noopener" target="_blank">Cookies</a></li>
+            <li><a href="https://www.rijksoverheid.nl/toegankelijkheid" rel="noopener" target="_blank">Toegankelijkheid</a></li>
+          </ul>
+        </nav>
+        <div class="meta">Demo / POC — geen echte gegevens.</div>
       </div>
     </footer>
   `,