feat(WP-67): merge behandelportal into this repo as a monorepo

Restructures into apps/ssp + apps/behandelportal (two Angular projects)
plus libs/shared + libs/beheer (cross-app libraries), replacing WP-61's
separate sibling repo. That split had already produced real drift: a
hand-vendored copy of the backend's OpenAPI doc, a shared/ui+layout tree
forked and silently diverging (7 files), and beheer + the styles.scss
token bridge duplicated byte-for-byte across both repos.

- git mv the SSP's src/app/* into apps/ssp/; fold shared/, beheer/,
  environments/, the Storybook docs/*.mdx, and styles.scss into
  libs/shared + libs/beheer (all confirmed identical between the two
  repos before merging). auth stays deliberately duplicated per
  ADR-0002 (actor-specific, expected to diverge) - amended there.
- One generated API client (libs/shared), no more vendored swagger.json.
- .dependency-cruiser split into a base factory + one config per app,
  and Storybook into .storybook-ssp/.storybook-behandelportal - both
  forced by the @auth/* alias resolving to different directories per app.
- SiteHeaderComponent/ShellComponent gained HEADER_NAV_ITEMS/
  HEADER_ADMIN_LINKS/DEBUG_PANEL injection tokens so each app supplies
  its own nav/admin-links/dev-panel instead of one being hardcoded.
- CLAUDE.md, ARCHITECTURE.md, dependencies.md, and ADR-0002 updated;
  WP-67 backlog entry documents the full decision trail.

npm run ci green (lint, dep:check x2, 360 tests across ssp/
behandelportal/shared/beheer, both localized builds, backend tests,
snippet + api-client drift); both dev servers, both Storybook
instances, and docker compose verified working.

The old sibling repo (/home/eho/repos/behandelportal) is left
untouched, not deleted.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/ssp/src/app/registratie/application/submit-change-request.spec.ts

@@ -0,0 +1,42 @@
+import { TestBed } from '@angular/core/testing';
+import { describe, it, expect } from 'vitest';
+import { Valid } from '@registratie/domain/change-request.machine';
+import { ChangeRequestAdapter } from '@registratie/infrastructure/change-request.adapter';
+import { createSubmitChangeRequest } from './submit-change-request';
+import { parseTelefoonnummer } from '@registratie/domain/value-objects/telefoonnummer';
+
+const telefoon = parseTelefoonnummer('0612345678');
+if (!telefoon.ok) throw new Error('fixture phone should parse');
+
+const data: Valid = { telefoon: telefoon.value };
+
+function setup(adapter: Partial<ChangeRequestAdapter>) {
+  TestBed.configureTestingModule({
+    providers: [{ provide: ChangeRequestAdapter, useValue: adapter }],
+  });
+  return TestBed.runInInjectionContext(() => createSubmitChangeRequest());
+}
+
+describe('createSubmitChangeRequest', () => {
+  it('resolves ok with the referentie on success', async () => {
+    const submit = setup({ changeRequest: () => Promise.resolve('BIG-2026-000123') });
+    const r = await submit(data);
+    expect(r).toEqual({ ok: true, value: 'BIG-2026-000123' });
+  });
+
+  it('folds a rejected call into a Result error, never throwing', async () => {
+    const submit = setup({
+      changeRequest: () => Promise.reject(new Error('network kaput')),
+    });
+    const r = await submit(data);
+    expect(r.ok).toBe(false);
+  });
+
+  it('surfaces a ProblemDetails detail message when the server rejects with one', async () => {
+    const submit = setup({
+      changeRequest: () => Promise.reject({ detail: 'Telefoonnummer is ongeldig.' }),
+    });
+    const r = await submit(data);
+    expect(r).toEqual({ ok: false, error: 'Telefoonnummer is ongeldig.' });
+  });
+});