spec files (10):
- Replace TranslateModule.forRoot() with provideTranslateService()
  in all *.spec.ts files — TranslateModule was removed in ngx-translate v18,
  causing all unit tests to fail at compile time

package.json:
- Remove autoprefixer (not referenced in postcss.config.json)
- Remove @tailwindcss/aspect-ratio (built into Tailwind v4, already
  documented as removed in CHANGELOG but still listed in devDependencies)

interceptors/retry.interceptor.ts:
- Remove debug console.log from production retry logic

features-demo.component.ts:
- Remove debug console.log from onSelectionChange handler