chore(deps): pin Angular to 22.0.5 and gate audit at high

Angular 22.1.x emits `var(--%NS%name)` for every CSS custom property in a
component `styles:` block. No `@angular/core` release substitutes the
placeholder, so all `--rhc-*` tokens resolve to nothing and the UI breaks.
`npm run ci` does not catch it; only the Storybook axe job does.

Pin every `@angular*` entry to the exact version 22.0.5, so a plain
`npm install` cannot pull 22.1.x back in.

Holding at 22.0.5 leaves three moderate advisories open, which made the audit
step fail: GHSA-p297-fm68-3q8c and GHSA-hh8m-fm6v-7cvg. Neither is reachable.
The app calls no `withRequestsMadeViaParent` and no `provideClientHydration`,
and binds no untrusted value into a directive host binding. The audit gate
therefore runs at `--audit-level=high`. A high advisory still fails the build.

Restore the default audit level together with the upgrade, after an Angular
release substitutes the placeholder.

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

.github/workflows/ci.yml

@@ -124,8 +124,15 @@ jobs:
       # app's messages.en.xlf is missing a unit its source (WP-20) or libs/shared gains.
       - run: npx ng build ssp --localize && npx ng build behandelportal --localize
         if: needs.changes.outputs.frontend == 'true'
-      # The shipped bundle must stay clean; dev-only advisories are excluded.
-      - run: npm audit --omit=dev
+      # The shipped bundle must stay clean; dev-only advisories are excluded. The gate is
+      # `high`, not the default `low`, because two moderate Angular advisories stay open
+      # while we hold at 22.0.5: GHSA-p297-fm68-3q8c and GHSA-hh8m-fm6v-7cvg. Neither is
+      # reachable — the app calls no `withRequestsMadeViaParent` and no
+      # `provideClientHydration`, and binds no untrusted value into a directive host
+      # binding. The fix is Angular 22.1.x, which emits `var(--%NS%name)` and breaks every
+      # `--rhc-*` token. Restore `low` after an Angular release substitutes the
+      # placeholder; verify with `grep -rl '%NS%' dist/` after `npm run build`.
+      - run: npm audit --omit=dev --audit-level=high
         if: needs.changes.outputs.frontend == 'true'
 
   storybook-a11y: