refactor: rename Application → Aanvraag across the wire (Step 1/8)

The wire said Application, the domain said Aanvraag — one aggregate with
two names at every hop. Rename the backend DTOs and the /applications
route to /aanvragen, regenerate the typed client, and rename the frontend
adapter/store to match.

Renamed: ApplicationSummaryDto/DetailDto, CreateApplicationRequest,
SubmitApplicationRequest/Response → Aanvraag* equivalents;
ApplicationsAdapter/Store → AanvragenAdapter/Store;
applications.adapter.ts/applications.store.ts → aanvragen.*.

Left untouched: the admin Case/Zaak vocabulary (/admin/cases,
AdminCasesStore) — a separate read model, not part of this rename; the
internal BigRegister.Domain.Applications namespace and the Applications
EF table (renaming those needs a new EF migration, out of scope here).

Part of the dashboard-readability refactor (see the approved plan).

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

apps/ssp/src/app/registratie/application/aanvragen.store.spec.ts

@@ -1,8 +1,8 @@
 import { TestBed } from '@angular/core/testing';
 import { describe, it, expect, vi } from 'vitest';
 import { SUBMIT_FAILED } from '@shared/application/submit';
-import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
-import { ApplicationsStore } from './applications.store';
+import { AanvragenAdapter } from '@registratie/infrastructure/aanvragen.adapter';
+import { AanvragenStore } from './aanvragen.store';
 
 const summary = (id: string) => ({
   id,
@@ -13,20 +13,20 @@ const summary = (id: string) => ({
   updatedAt: '2026-07-23T10:00:00Z',
 });
 
-function setup(adapter: Partial<ApplicationsAdapter>): ApplicationsStore {
+function setup(adapter: Partial<AanvragenAdapter>): AanvragenStore {
   TestBed.configureTestingModule({
-    providers: [{ provide: ApplicationsAdapter, useValue: adapter }],
+    providers: [{ provide: AanvragenAdapter, useValue: adapter }],
   });
   // The store's own constructor kicks off `load()` (dashboard revisit refresh) —
   // give every test a `list` so that initial call has something to resolve.
-  return TestBed.inject(ApplicationsStore);
+  return TestBed.inject(AanvragenStore);
 }
 
-describe('ApplicationsStore', () => {
+describe('AanvragenStore', () => {
   it('loads and parses the list', async () => {
     const store = setup({ list: () => Promise.resolve([summary('a'), summary('b')]) });
     await store.load();
-    const s = store.applications();
+    const s = store.aanvragen();
     expect(s.tag).toBe('Success');
     expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['a', 'b']);
   });
@@ -41,7 +41,7 @@ describe('ApplicationsStore', () => {
 
     await store.cancel('a');
     expect(cancel).toHaveBeenCalledWith('a');
-    const s = store.applications();
+    const s = store.aanvragen();
     expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['b']);
     expect(store.lastError()).toBeNull();
   });
@@ -55,7 +55,7 @@ describe('ApplicationsStore', () => {
     await store.load();
 
     await store.cancel('a');
-    const s = store.applications();
+    const s = store.aanvragen();
     expect(s.tag === 'Success' && s.value.map((a) => a.id)).toEqual(['a']); // reappears
     expect(store.lastError()).toBe(SUBMIT_FAILED);
   });

apps/ssp/src/app/registratie/application/aanvragen.store.ts

@@ -2,15 +2,12 @@ import { Injectable, inject, signal } from '@angular/core';
 import { RemoteData } from '@shared/application/remote-data';
 import { runSubmit, SUBMIT_FAILED } from '@shared/application/submit';
 import { Aanvraag } from '@registratie/domain/aanvraag';
-import {
-  ApplicationsAdapter,
-  parseApplications,
-} from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter, parseAanvragen } from '@registratie/infrastructure/aanvragen.adapter';
 
 type Err = Error | undefined;
 
 /**
- * The dashboard's view of the user's applications (aanvragen) — the backend is the
+ * The dashboard's view of the user's aanvragen — the backend is the
  * system of record (PRD 0001). One root singleton OWNS the list as a writable
  * RemoteData signal (CLAUDE.md §3: change state only through methods). Cancel removes
  * the row SYNCHRONOUSLY, so the block disappears deterministically — no dependence on
@@ -20,11 +17,11 @@ type Err = Error | undefined;
  * surfaces `lastError` on failure (RB-20).
  */
 @Injectable({ providedIn: 'root' })
-export class ApplicationsStore {
-  private adapter = inject(ApplicationsAdapter);
+export class AanvragenStore {
+  private adapter = inject(AanvragenAdapter);
 
   private state = signal<RemoteData<Err, Aanvraag[]>>({ tag: 'Loading' });
-  readonly applications = this.state.asReadonly();
+  readonly aanvragen = this.state.asReadonly();
 
   /** Set on a failed cancel (RB-20): the optimistic removal already rolled back by
       then, this is only the message for the alert the page renders above the list. */
@@ -40,7 +37,7 @@ export class ApplicationsStore {
   async load() {
     if (this.state().tag !== 'Success') this.state.set({ tag: 'Loading' });
     try {
-      const parsed = parseApplications(await this.adapter.list());
+      const parsed = parseAanvragen(await this.adapter.list());
       this.state.set(
         parsed.ok
           ? { tag: 'Success', value: parsed.value }

apps/ssp/src/app/registratie/application/admin-cases.store.spec.ts

@@ -1,7 +1,7 @@
 import { TestBed } from '@angular/core/testing';
 import { describe, it, expect, vi } from 'vitest';
 import { SUBMIT_FAILED } from '@shared/application/submit';
-import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter } from '@registratie/infrastructure/aanvragen.adapter';
 import { AdminCasesStore } from './admin-cases.store';
 
 const summary = (id: string) => ({
@@ -14,9 +14,9 @@ const summary = (id: string) => ({
   owner: '19012345601',
 });
 
-function setup(adapter: Partial<ApplicationsAdapter>): AdminCasesStore {
+function setup(adapter: Partial<AanvragenAdapter>): AdminCasesStore {
   TestBed.configureTestingModule({
-    providers: [{ provide: ApplicationsAdapter, useValue: adapter }],
+    providers: [{ provide: AanvragenAdapter, useValue: adapter }],
   });
   return TestBed.inject(AdminCasesStore);
 }

apps/ssp/src/app/registratie/application/admin-cases.store.ts

@@ -2,16 +2,13 @@ import { Injectable, inject, signal } from '@angular/core';
 import { RemoteData } from '@shared/application/remote-data';
 import { runSubmit, SUBMIT_FAILED } from '@shared/application/submit';
 import { Aanvraag } from '@registratie/domain/aanvraag';
-import {
-  ApplicationsAdapter,
-  parseApplications,
-} from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter, parseAanvragen } from '@registratie/infrastructure/aanvragen.adapter';
 
 type Err = Error | undefined;
 
 /**
  * Admin view of ALL cases across owners (WP-36; `cases:manage`) — the back-office
- * counterpart of the user-facing `ApplicationsStore`. Same shape: one root singleton
+ * counterpart of the user-facing `AanvragenStore`. Same shape: one root singleton
  * owns the list as a writable RemoteData signal, delete removes the row synchronously
  * (optimistic), goes through `runSubmit`, and rolls back plus surfaces `lastError` on
  * failure (RB-20). Admin delete removes any case (any owner, submitted or not — the
@@ -19,7 +16,7 @@ type Err = Error | undefined;
  */
 @Injectable({ providedIn: 'root' })
 export class AdminCasesStore {
-  private adapter = inject(ApplicationsAdapter);
+  private adapter = inject(AanvragenAdapter);
 
   private state = signal<RemoteData<Err, Aanvraag[]>>({ tag: 'Loading' });
   readonly cases = this.state.asReadonly();
@@ -34,7 +31,7 @@ export class AdminCasesStore {
   async load() {
     if (this.state().tag !== 'Success') this.state.set({ tag: 'Loading' });
     try {
-      const parsed = parseApplications(await this.adapter.listAll());
+      const parsed = parseAanvragen(await this.adapter.listAll());
       this.state.set(
         parsed.ok
           ? { tag: 'Success', value: parsed.value }

apps/ssp/src/app/registratie/application/draft-sync.spec.ts

@@ -2,14 +2,14 @@ import { ApplicationRef, signal } from '@angular/core';
 import { TestBed } from '@angular/core/testing';
 import { ActivatedRoute, Router } from '@angular/router';
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter } from '@registratie/infrastructure/aanvragen.adapter';
 import { createDraftSync, DraftSnapshot } from './draft-sync';
 
-function setup(adapter: Partial<ApplicationsAdapter>) {
+function setup(adapter: Partial<AanvragenAdapter>) {
   const navigate = vi.fn().mockResolvedValue(true);
   TestBed.configureTestingModule({
     providers: [
-      { provide: ApplicationsAdapter, useValue: adapter },
+      { provide: AanvragenAdapter, useValue: adapter },
       { provide: Router, useValue: { navigate } },
       { provide: ActivatedRoute, useValue: { snapshot: { queryParamMap: { get: () => null } } } },
     ],

apps/ssp/src/app/registratie/application/draft-sync.ts

@@ -4,11 +4,11 @@ import { Result } from '@shared/kernel/fp';
 import { runSubmit, SUBMIT_FAILED } from '@shared/application/submit';
 import { registerPendingSave } from '@shared/application/pending-saves';
 import type {
-  SubmitApplicationRequest,
-  SubmitApplicationResponse,
+  AanvraagIndienenRequest,
+  AanvraagIndienenResponse,
 } from '@shared/infrastructure/api-client';
 import { AanvraagType } from '@registratie/domain/aanvraag';
-import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter } from '@registratie/infrastructure/aanvragen.adapter';
 import { findConcept, loadConcept } from './find-concept';
 
 /** What a wizard persists per step: the opaque machine snapshot + progress + docs. */
@@ -46,7 +46,7 @@ const DEBOUNCE_MS = 600; // ponytail: fixed debounce; tune if the sync feels lag
  * Inert without a Router (stories) or when `enabled()` is false — no network, no resume.
  */
 export function createDraftSync(deps: DraftSyncDeps) {
-  const adapter = inject(ApplicationsAdapter);
+  const adapter = inject(AanvragenAdapter);
   const router = inject(Router, { optional: true });
   const route = inject(ActivatedRoute, { optional: true });
   const active = () => deps.enabled() && !!router && !!route;
@@ -190,7 +190,7 @@ export function createDraftSync(deps: DraftSyncDeps) {
     /** Submit through the aanvraag lifecycle: ensure the Concept exists, then
         `POST /applications/{id}/submit` (server sets autoApprovable + transitions).
         Folded into a Result like the old submit-* commands. */
-    submit(body: SubmitApplicationRequest): Promise<Result<string, SubmitApplicationResponse>> {
+    submit(body: AanvraagIndienenRequest): Promise<Result<string, AanvraagIndienenResponse>> {
       return runSubmit(async () => adapter.submit(await ensureId(), body), SUBMIT_FAILED);
     },
 

apps/ssp/src/app/registratie/application/find-concept.spec.ts

@@ -1,11 +1,11 @@
 import { describe, it, expect } from 'vitest';
-import { ApplicationsAdapter } from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter } from '@registratie/infrastructure/aanvragen.adapter';
 import { findConcept, loadConcept } from './find-concept';
 
 // Free functions taking the adapter as a parameter (no inject()) — a plain fake
 // object is enough, no Angular TestBed needed.
-function fakeAdapter(overrides: Partial<ApplicationsAdapter>): ApplicationsAdapter {
-  return overrides as ApplicationsAdapter;
+function fakeAdapter(overrides: Partial<AanvragenAdapter>): AanvragenAdapter {
+  return overrides as AanvragenAdapter;
 }
 
 describe('findConcept', () => {

apps/ssp/src/app/registratie/application/find-concept.ts

@@ -1,8 +1,5 @@
 import { AanvraagType } from '@registratie/domain/aanvraag';
-import {
-  ApplicationsAdapter,
-  parseApplications,
-} from '@registratie/infrastructure/applications.adapter';
+import { AanvragenAdapter, parseAanvragen } from '@registratie/infrastructure/aanvragen.adapter';
 
 /**
  * Read half of the Concept lookup that `createDraftSync` (`draft-sync.ts`) needs
@@ -14,11 +11,11 @@ import {
 
 /** Find the user's existing Concept of a given type (at most one), if any. */
 export async function findConcept(
-  adapter: ApplicationsAdapter,
+  adapter: AanvragenAdapter,
   type: AanvraagType,
 ): Promise<string | undefined> {
   try {
-    const parsed = parseApplications(await adapter.list());
+    const parsed = parseAanvragen(await adapter.list());
     return parsed.ok
       ? parsed.value.find((a) => a.type === type && a.status.tag === 'Concept')?.id
       : undefined;
@@ -34,10 +31,7 @@ export async function findConcept(
 export type LoadedConcept = { tag: 'concept'; draft: unknown | null } | { tag: 'not-concept' };
 
 /** Load a specific Concept by id and report whether it is still editable. */
-export async function loadConcept(
-  adapter: ApplicationsAdapter,
-  id: string,
-): Promise<LoadedConcept> {
+export async function loadConcept(adapter: AanvragenAdapter, id: string): Promise<LoadedConcept> {
   try {
     const dto = await adapter.detail(id);
     if (dto.status && dto.status.tag !== 'Concept') return { tag: 'not-concept' };