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.spec.ts

@@ -0,0 +1,41 @@
+import { describe, it, expect } from 'vitest';
+import { tasksFromProfile } from './tasks';
+import { Registration } from './registration';
+
+const base: Registration = {
+  bigNummer: '12345678901',
+  naam: 'A. Tester',
+  beroep: 'arts',
+  registratiedatum: '2018-01-01',
+  geboortedatum: '1980-01-01',
+  status: { tag: 'Geregistreerd', herregistratieDatum: '2026-12-31' },
+};
+
+describe('tasksFromProfile', () => {
+  it('offers herregistratie when within the deadline window', () => {
+    const tasks = tasksFromProfile(base, new Date('2026-06-27'));
+    expect(tasks).toHaveLength(1);
+    expect(tasks[0].to).toBe('/herregistratie');
+    expect(tasks[0].description).toContain('31 december 2026');
+  });
+
+  it('offers nothing when the deadline is far away', () => {
+    const far: Registration = { ...base, status: { tag: 'Geregistreerd', herregistratieDatum: '2030-12-31' } };
+    expect(tasksFromProfile(far, new Date('2026-06-27'))).toHaveLength(0);
+  });
+
+  it('surfaces a notice for a suspended registration', () => {
+    const reg: Registration = { ...base, status: { tag: 'Geschorst', geschorstTot: '2027-01-01', reden: 'Onderzoek' } };
+    const tasks = tasksFromProfile(reg, new Date('2026-06-27'));
+    expect(tasks).toHaveLength(1);
+    expect(tasks[0].title).toContain('geschorst');
+    expect(tasks[0].description).toBe('Onderzoek');
+  });
+
+  it('surfaces a notice for a struck-off registration', () => {
+    const reg: Registration = { ...base, status: { tag: 'Doorgehaald', doorgehaaldOp: '2025-01-01', reden: 'Op eigen verzoek' } };
+    const tasks = tasksFromProfile(reg, new Date('2026-06-27'));
+    expect(tasks).toHaveLength(1);
+    expect(tasks[0].title).toContain('doorgehaald');
+  });
+});