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>

package.json

@@ -34,6 +34,7 @@
     "@angular/build": "^22.0.4",
     "@angular/cli": "^22.0.4",
     "@angular/compiler-cli": "^22.0.0",
+    "@angular/localize": "^22.0.4",
     "@angular/platform-browser-dynamic": "^22.0.0",
     "@compodoc/compodoc": "^1.2.1",
     "@storybook/addon-a11y": "^10.4.6",
@@ -58,6 +59,8 @@
     "webpack-dev-server": "^5.2.5",
     "sockjs": "^0.3.24",
     "uuid": "^11.1.1",
-    "eslint": { "ajv": "^6.12.6" }
+    "eslint": {
+      "ajv": "^6.12.6"
+    }
   }
 }