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>

libs/shared/src/infrastructure/role.interceptor.spec.ts

@@ -0,0 +1,54 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { roleInterceptor } from './role.interceptor';
+
+// currentRole() reads window.location.search; set it via the real URL rather than
+// vi.mock (the Angular unit-test system forbids mocking relative imports).
+beforeEach(() => window.history.replaceState({}, '', '/?role=admin'));
+afterEach(() => {
+  window.history.replaceState({}, '', '/');
+  sessionStorage.clear(); // currentRole() now persists the dev role; don't leak across tests
+});
+
+// Minimal stand-in for HttpRequest — the interceptor only reads `url` and calls
+// `clone({ setHeaders })`. Avoids importing @angular/common/http (its XHR chunk needs
+// the JIT compiler under vitest).
+function fakeReq(url: string) {
+  const make = (headers: Map<string, string>) => ({
+    url,
+    headers,
+    clone(opts: { setHeaders: Record<string, string> }) {
+      const next = new Map(headers);
+      for (const [k, v] of Object.entries(opts.setHeaders)) next.set(k, v);
+      return make(next);
+    },
+  });
+  return make(new Map());
+}
+
+/** Run the interceptor and return the request it forwarded to `next`. */
+function forward(url: string) {
+  let seen!: ReturnType<typeof fakeReq>;
+  const next = (r: ReturnType<typeof fakeReq>) => {
+    seen = r;
+    return undefined;
+  };
+  // Cast: the fake matches the shape the interceptor actually touches.
+  (roleInterceptor as unknown as (req: unknown, next: unknown) => unknown)(fakeReq(url), next);
+  return seen;
+}
+
+describe('roleInterceptor', () => {
+  it.each([
+    '/api/v1/brief',
+    '/api/v1/admin/org-template',
+    '/api/v1/stamdata', // WP-29: the admin stamdata reads 403 without X-Role
+    '/api/v1/stamdata/professions?peildatum=1999-01-01',
+    '/api/v1/me',
+  ])('stamps X-Role on the role-aware endpoint %s', (url) => {
+    expect(forward(url).headers.get('X-Role')).toBe('admin');
+  });
+
+  it('leaves an unrelated endpoint untouched', () => {
+    expect(forward('/api/v1/duo/diplomas').headers.has('X-Role')).toBe(false);
+  });
+});