feat(aanvragen): richer rows (purpose + status) linking to a case-detail page

- Aanvragen rows now show what the aanvraag is for (purpose subtitle) and an
  explicit status label (In behandeling / Goedgekeurd / Afgewezen) alongside the
  reference + submit date, via an expanded aanvraag-view (purposeLabel,
  statusLabel, referentie, detailRows) + spec.
- Rows link to a new /aanvraag/:id case-detail page, so the CIBG chevron shows
  and each aanvraag opens as a (stub) case — it lists soort/waarvoor/status/
  referentie/ingediend in a Datablock, with a note that full handling is future.

GREEN: lint, tokens, 183 tests, build, 137 axe stories. Verified visually
(dashboard aanvragen rows, upload drop-zone, datablock) via Storybook screenshots.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/registratie/ui/dashboard.page.ts

@@ -43,7 +43,7 @@ import { tasksFromProfile } from '@registratie/domain/tasks';
                 <app-application-list>
                   @for (a of ingediend(); track a.id) {
                     @let row = submittedRow(a);
-                    <li app-application-link animate.enter="app-item-enter" animate.leave="app-item-leave" [heading]="row.heading" [status]="row.status" [subtitle]="row.subtitle"></li>
+                    <li app-application-link animate.enter="app-item-enter" animate.leave="app-item-leave" [heading]="row.heading" [subtitle]="row.subtitle" [status]="row.status" [to]="'/aanvraag/' + a.id"></li>
                   }
                 </app-application-list>
               }