fix: the wizards' seed input never arrived (RD-39)

All three wizard containers read `this.seed()` in the constructor. Angular
binds component inputs after the constructor runs, so the value was always the
`initial` default, `seeded !== initial` was always false, and every mount took
the `draftSync.resume()` branch. The `seed` input was dead code.

The two single-step forms built on the same idiom read the input inside the
microtask and work correctly. That contrast is the diagnosis.

Impact: 21 seeded wizard stories rendered step 1 instead of the state they
asked for. Storybook is this repo's UI test surface, so the states with no
other coverage were exactly the ones not rendering — Submitting, Submitted,
Failed, Ingediend, Mislukt. The a11y runner checks that whatever rendered is
accessible, never that the right thing rendered, so nothing caught it.
Production was unaffected: no route binds `seed`.

Read the input inside the microtask, matching the two forms. Turn the spec's
old `componentInstance.dispatch(...)` workaround into a real regression test
through `componentRef.setInput('seed', ...)`.

Verified: with the intake fix reverted the two spec cases fail; with it, 319
pass. `npm run ci --full` is green, and the newly rendered markup produced no
axe violations. A browser check of seven seeded stories across all three
wizards asserts text only reachable from a seed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/ssp/src/app/herregistratie/ui/herregistratie-wizard/herregistratie-wizard.component.ts

@@ -263,10 +263,13 @@ export class HerregistratieWizardComponent {
   constructor() {
     // An explicit seed (stories/tests) wins; otherwise resume the backend draft
     // (`?aanvraag=<id>`) or start fresh. Persistence is the draftSync controller's job.
-    const seeded = this.seed();
-    queueMicrotask(() =>
-      seeded !== initial ? this.dispatch({ tag: 'Seed', state: seeded }) : this.draftSync.resume(),
-    );
+    // Read `seed()` INSIDE the microtask: Angular binds inputs after the constructor
+    // runs, so an eager read here always returns the `initial` default.
+    queueMicrotask(() => {
+      const seeded = this.seed();
+      if (seeded !== initial) this.dispatch({ tag: 'Seed', state: seeded });
+      else void this.draftSync.resume();
+    });
   }
 
   /** Reset the wizard to a fresh, empty start. */

apps/ssp/src/app/herregistratie/ui/intake-wizard/intake-wizard.component.spec.ts

@@ -26,14 +26,30 @@ const buitenlandJa: IntakeState = {
   scholingThreshold: 1000,
 };
 
+/** Mount with a seed and let the constructor's microtask apply it. */
+async function mountSeeded(state: IntakeState) {
+  TestBed.configureTestingModule({
+    providers: [provideHttpClient(), provideApiClient()],
+  });
+  const fixture = TestBed.createComponent(IntakeWizardComponent);
+  fixture.componentRef.setInput('seed', state);
+  await Promise.resolve(); // the seed is applied in a queueMicrotask
+  fixture.detectChanges();
+  return fixture;
+}
+
 describe('IntakeWizardComponent', () => {
-  it('renders each field group as its own grey <fieldset>', () => {
-    TestBed.configureTestingModule({
-      providers: [provideHttpClient(), provideApiClient()],
-    });
-    const fixture = TestBed.createComponent(IntakeWizardComponent);
-    fixture.componentInstance.dispatch({ tag: 'Seed', state: buitenlandJa });
-    fixture.detectChanges();
+  // Regression: the constructor must read `seed()` INSIDE its microtask. Angular binds
+  // inputs after the constructor runs, so an eager read silently yields the `initial`
+  // default and every seeded story renders step 1 instead of the state it asked for.
+  it('honours the seed input', async () => {
+    const fixture = await mountSeeded(buitenlandJa);
+
+    expect(fixture.componentInstance.state()).toEqual(buitenlandJa);
+  });
+
+  it('renders each field group as its own grey <fieldset>', async () => {
+    const fixture = await mountSeeded(buitenlandJa);
 
     const fieldsets: HTMLElement[] = Array.from(
       fixture.nativeElement.querySelectorAll('form.form-horizontal fieldset'),

apps/ssp/src/app/herregistratie/ui/intake-wizard/intake-wizard.component.ts

@@ -212,10 +212,13 @@ export class IntakeWizardComponent {
   constructor() {
     // An explicit seed (stories/tests) wins; otherwise resume the backend draft
     // (`?aanvraag=<id>`) or start fresh. Persistence is the draftSync controller's job.
-    const seeded = this.seed();
-    queueMicrotask(() =>
-      seeded !== initial ? this.dispatch({ tag: 'Seed', state: seeded }) : this.draftSync.resume(),
-    );
+    // Read `seed()` INSIDE the microtask: Angular binds inputs after the constructor
+    // runs, so an eager read here always returns the `initial` default.
+    queueMicrotask(() => {
+      const seeded = this.seed();
+      if (seeded !== initial) this.dispatch({ tag: 'Seed', state: seeded });
+      else void this.draftSync.resume();
+    });
     // Apply the server-owned threshold into machine state as it arrives. Track
     // only the policy value; untrack the dispatch (it reads the state signal
     // internally, which would otherwise make this effect loop on its own write).

apps/ssp/src/app/registratie/ui/registratie-wizard/registratie-wizard.component.ts

@@ -233,10 +233,13 @@ export class RegistratieWizardComponent {
   constructor() {
     // An explicit seed (stories/tests) wins; otherwise resume from the backend draft
     // (`?aanvraag=<id>`), or start fresh. Persistence is the draftSync controller's job.
-    const seeded = this.seed();
-    queueMicrotask(() =>
-      seeded !== initial ? this.dispatch({ tag: 'Seed', state: seeded }) : this.draftSync.resume(),
-    );
+    // Read `seed()` INSIDE the microtask: Angular binds inputs after the constructor
+    // runs, so an eager read here always returns the `initial` default.
+    queueMicrotask(() => {
+      const seeded = this.seed();
+      if (seeded !== initial) this.dispatch({ tag: 'Seed', state: seeded });
+      else void this.draftSync.resume();
+    });
     // Prefill the address from the BRP lookup as it arrives. Track only the facade's
     // parsed prefill signal; untrack the dispatch (it reads the state signal, which
     // would otherwise make this effect loop on its own write). Don't clobber