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/herregistratie/domain/herregistratie.machine.ts

@@ -40,6 +40,11 @@ export type WizardState =
 
 export const initial: WizardState = { tag: 'Editing', step: 1, draft: { uren: '', jaren: '', punten: '' }, errors: {}, upload: initialUpload };
 
+/** Has the user meaningfully started, so it's worth persisting as a Concept? */
+export function hasProgress(s: Extract<WizardState, { tag: 'Editing' }>): boolean {
+  return s.step > 1 || !!s.draft.uren || !!s.draft.jaren || !!s.draft.punten || deliveryRefs(s.upload).some((r) => r.channel === 'digital' && !!r.documentId);
+}
+
 /** Parse every field; on success hand back a Valid, else the per-field errors. */
 function validate(draft: Draft, upload: UploadState): Result<StepErrors, Valid> {
   const uren = parseUren(draft.uren);