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/registratie/domain/tasks.ts

@@ -0,0 +1,59 @@
+import { Registration } from './registration';
+import { herregistratieDeadline, isHerregistratieEligible } from './registration.policy';
+
+/**
+ * What the dashboard's "Wat moet ik regelen" list needs. Pure presentation data
+ * derived from the registration — no Angular. Mirrors the shared TaskItem shape.
+ */
+export interface PortalTask {
+  title: string;
+  description: string;
+  to: string;
+  actionLabel: string;
+}
+
+function formatNL(d: Date): string {
+  return d.toLocaleDateString('nl-NL', { day: 'numeric', month: 'long', year: 'numeric' });
+}
+
+/**
+ * Derive the open tasks for a professional from their registration (pure;
+ * `today` is injected so it's testable). Herregistratie within its window is the
+ * primary action; a suspended/struck-off registration surfaces as a notice-task.
+ * Reuses the same rules the detail/summary use (registration.policy).
+ */
+export function tasksFromProfile(reg: Registration, today: Date): PortalTask[] {
+  const tasks: PortalTask[] = [];
+
+  if (isHerregistratieEligible(reg, today)) {
+    const deadline = herregistratieDeadline(reg);
+    tasks.push({
+      title: 'Vraag uw herregistratie aan',
+      description: deadline
+        ? `Verleng uw registratie vóór ${formatNL(deadline)}.`
+        : 'U kunt nu uw herregistratie aanvragen.',
+      to: '/herregistratie',
+      actionLabel: 'Herregistratie aanvragen',
+    });
+  }
+
+  if (reg.status.tag === 'Geschorst') {
+    tasks.push({
+      title: 'Uw registratie is geschorst',
+      description: reg.status.reden,
+      to: '/registratie',
+      actionLabel: 'Bekijk uw gegevens',
+    });
+  }
+
+  if (reg.status.tag === 'Doorgehaald') {
+    tasks.push({
+      title: 'Uw registratie is doorgehaald',
+      description: reg.status.reden,
+      to: '/registratie',
+      actionLabel: 'Bekijk uw gegevens',
+    });
+  }
+
+  return tasks;
+}