Migrate constructor DI to inject() (@angular-eslint/prefer-inject)

[fpigeonjr]

Parent

#580

What to build

Migrate constructor-based dependency injection to the inject() function across the library's component/directive/service areas, resolving the @angular-eslint/prefer-inject warnings introduced by the Angular 19→20 step (angular-eslint 20's tsRecommended config newly includes this rule as of #574).

This rule accounts for 142 of the 1675 warnings currently reported in the root workspace (baseline temporarily raised from 1619 to 1675 in #574 to unblock the Angular 20 upgrade without silently absorbing new debt or hand-editing the ratchet file outside its documented --bump path). It was not present in the pre-upgrade baseline at all (0 → 142), so all of it is attributable to the angular-eslint version bump rather than pre-existing debt.

Acceptance criteria

• Constructor-parameter DI is converted to inject() calls across independently reviewable component areas
• Public exports and frozen deep-import paths remain intact
• Relevant component tests and the full test-app suite remain green
• @angular-eslint/prefer-inject is promoted to an error once its debt reaches zero
• The warning baseline is lowered to reflect the cleanup

Blocked by

• Angular 19 → 20 stepped upgrade #574