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/herregistratie/infrastructure/intake-policy.adapter.spec.ts

@@ -0,0 +1,15 @@
+import { describe, it, expect } from 'vitest';
+import { parseIntakePolicy } from './intake-policy.adapter';
+
+describe('intake-policy.adapter parse boundary', () => {
+  it('parses a well-formed policy', () => {
+    const r = parseIntakePolicy({ scholingThreshold: 800 });
+    expect(r).toEqual({ ok: true, value: { scholingThreshold: 800 } });
+  });
+
+  it('rejects a missing or non-numeric threshold', () => {
+    expect(parseIntakePolicy({}).ok).toBe(false);
+    expect(parseIntakePolicy({ scholingThreshold: '800' }).ok).toBe(false);
+    expect(parseIntakePolicy(null).ok).toBe(false);
+  });
+});

apps/ssp/src/app/herregistratie/infrastructure/intake-policy.adapter.ts

@@ -0,0 +1,33 @@
+import { Injectable, inject, resource } from '@angular/core';
+import { Result, ok, err } from '@shared/kernel/fp';
+import { IntakePolicy } from '@herregistratie/domain/intake.machine';
+import { ApiClient } from '@shared/infrastructure/api-client';
+
+/**
+ * Infrastructure adapter for the intake policy (the scholing threshold config
+ * value). Same shape as every other adapter — a signal `resource` over the
+ * generated typed client — so HTTP lives in exactly one place per concern.
+ */
+@Injectable({ providedIn: 'root' })
+export class IntakePolicyAdapter {
+  private client = inject(ApiClient);
+
+  policyResource() {
+    return resource({
+      loader: async () => {
+        const parsed = parseIntakePolicy(await this.client.policy());
+        if (!parsed.ok) throw new Error(parsed.error);
+        return parsed.value;
+      },
+    });
+  }
+}
+
+/** Trust-boundary parse: an unrecognized/missing threshold is an explicit Failure. */
+export function parseIntakePolicy(json: unknown): Result<string, IntakePolicy> {
+  if (typeof json !== 'object' || json === null) return err('intake-policy: not an object');
+  const dto = json as { scholingThreshold?: unknown };
+  if (typeof dto.scholingThreshold !== 'number')
+    return err('intake-policy: missing scholingThreshold');
+  return ok({ scholingThreshold: dto.scholingThreshold });
+}