Step 1: i18n foundation (@angular/localize) + data inventory

Domain reference data already lives in the backend (per ADR-0001); the only
residual "move" was ~90 inlined Dutch UI strings with no i18n layer.

- Wire @angular/localize ($localize) — Angular first-party, no third-party lib
- Pin the pattern on shared/ui/async: Dutch fallbacks → language-agnostic
  input()s with localizable $localize defaults (English-shared-UI rule)
- CLAUDE.md: drop i18n (now in scope) + stale "real backend"/"OpenAPI codegen"
  (both already shipped); document the $localize convention

Bulk string sweep deferred to Step 2 to avoid touching ~36 files twice.

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

src/main.ts

@@ -1,6 +1,7 @@
+/// <reference types="@angular/localize" />
+
 import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
 import { App } from './app/app';
 
-bootstrapApplication(App, appConfig)
-  .catch((err) => console.error(err));
+bootstrapApplication(App, appConfig).catch((err) => console.error(err));