Mijn aanvragen (E): two-flow submit through the aanvraag + all-wizard persistence

All three wizards now submit through the backend aanvraag lifecycle, so a
submitted Concept actually transitions (dashboard shows it correctly in F).

- blockActions(status) (domain + spec): the pure per-status action decision
  (Concept → resume/cancel; In behandeling → viewDocuments; resolved → none).
- createDraftSync.submit(): ensure the Concept exists, then
  POST /applications/{id}/submit; folded into a Result like the old commands.
- registratie: submit via draftSync (duo → auto, handmatig → manual pending — the
  old 422 path is gone from the wizard).
- intake + herregistratie: adopt createDraftSync (persistence + resume-by-link);
  intake retires sessionStorage `intake-v3`; herregistratie gains persistence.
  Both submit through the aanvraag too. hasProgress added to each machine (+spec).
- Delete now-dead submit-registratie/submit-intake/submit-herregistratie commands.

Deferred: the old /registrations, /intakes, /herregistraties backend endpoints +
RejectRegistratie are now unused by the FE but still present (+ tested) — retiring
them cascades into backend test rewrites, so it's a focused follow-up cleanup.
Gates green: vitest 128, lint, build; backend unchanged (dotnet 56).

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

src/app/registratie/domain/block-actions.spec.ts

@@ -0,0 +1,17 @@
+import { describe, it, expect } from 'vitest';
+import { blockActions } from './block-actions';
+
+describe('blockActions', () => {
+  it('a Concept can be resumed or cancelled', () => {
+    expect(blockActions({ tag: 'Concept', stepIndex: 1, stepCount: 3 })).toEqual(['resume', 'cancel']);
+  });
+
+  it('an in-behandeling aanvraag only exposes its documents', () => {
+    expect(blockActions({ tag: 'InBehandeling', referentie: 'BIG-1', manual: true })).toEqual(['viewDocuments']);
+  });
+
+  it('resolved aanvragen have no actions', () => {
+    expect(blockActions({ tag: 'Goedgekeurd', referentie: 'BIG-1' })).toEqual([]);
+    expect(blockActions({ tag: 'Afgewezen', referentie: 'BIG-1', reden: 'x' })).toEqual([]);
+  });
+});

src/app/registratie/domain/block-actions.ts

@@ -0,0 +1,18 @@
+import { AanvraagStatus } from './aanvraag';
+
+/** What a dashboard "Mijn aanvragen" block offers per status. The badge itself
+    follows directly from `status.tag` (the UI maps tag → colour + label), so this
+    pure function owns only the *actions* decision. */
+export type BlockAction = 'resume' | 'cancel' | 'viewDocuments';
+
+export function blockActions(status: AanvraagStatus): BlockAction[] {
+  switch (status.tag) {
+    case 'Concept':
+      return ['resume', 'cancel'];
+    case 'InBehandeling':
+      return ['viewDocuments'];
+    case 'Goedgekeurd':
+    case 'Afgewezen':
+      return [];
+  }
+}