Upload feature (e): wire inline upload (registratie beroep) + documenten step (herregistratie)

- Fold UploadState into both wizard machines; route via { tag: 'Upload', msg }
- Gate step validation on requiredCategoriesSatisfied; include deliveryRefs in submit
- Shared createUploadController (effectful glue: categories, transport, focus-poll, File map)
- rejectReason pure format validator + specs; bump registratie storage key to v2

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/registratie/domain/registratie-wizard.machine.spec.ts

@@ -1,5 +1,6 @@
 import { describe, it, expect } from 'vitest';
 import { ok, err } from '@shared/kernel/fp';
+import { initialUpload } from '@shared/upload/upload.machine';
 import {
   Draft,
   RegistratieState,
@@ -25,6 +26,7 @@ const invullen = (draft: Partial<Draft>, cursor = 0): RegistratieState => ({
   draft: { antwoorden: {}, ...draft },
   cursor,
   errors: {},
+  upload: initialUpload,
 });
 
 const validAdres = { straat: 'Lange Voorhout 9', postcode: '2514 EA', woonplaats: 'Den Haag', correspondentie: 'post' as const, adresHerkomst: 'brp' as const };
@@ -204,3 +206,31 @@ describe('reduce (message-driven happy path)', () => {
     expect((s as any).data.beroep).toBe('Arts');
   });
 });
+
+describe('inline document upload (beroep step)', () => {
+  const cat = { categoryId: 'diploma', label: 'Diploma', description: '', required: true, acceptedTypes: [], maxSizeMb: 10, multiple: false, allowPostDelivery: true };
+
+  it('routes Upload messages through the upload reducer', () => {
+    const s = reduce(invullen(validDraft), { tag: 'Upload', msg: { type: 'CategoriesLoaded', categories: [cat] } });
+    expect((s as any).upload.categories).toHaveLength(1);
+  });
+
+  it('blocks the beroep step until a required category is satisfied', () => {
+    let s = reduce(invullen(validDraft, 1), { tag: 'Upload', msg: { type: 'CategoriesLoaded', categories: [cat] } });
+    s = reduce(s, { tag: 'Next' }); // beroep → controle blocked
+    expect(currentStep(s as any)).toBe('beroep');
+    expect((s as any).errors.documenten).toBeTruthy();
+    // choosing post delivery satisfies the requirement
+    s = reduce(s, { tag: 'Upload', msg: { type: 'DeliveryChannelChanged', categoryId: 'diploma', channel: 'post' } });
+    s = reduce(s, { tag: 'Next' });
+    expect(currentStep(s as any)).toBe('controle');
+  });
+
+  it('includes delivery refs in the submitted data', () => {
+    let s = reduce(invullen(validDraft), { tag: 'Upload', msg: { type: 'CategoriesLoaded', categories: [cat] } });
+    s = reduce(s, { tag: 'Upload', msg: { type: 'DeliveryChannelChanged', categoryId: 'diploma', channel: 'post' } });
+    const done = submit(s as any);
+    expect(done.tag).toBe('Indienen');
+    expect((done as any).data.documents).toEqual([{ categoryId: 'diploma', channel: 'post' }]);
+  });
+});