improve: performance

src/app/services/shell-language.service.ts

@@ -0,0 +1,26 @@
+import { Injectable, computed, inject } from '@angular/core';
+
+import { deShellLanguage, enShellLanguage } from '../../languages/shell';
+import type { LanguageCode, LanguageShellPack } from '../../languages/language.types';
+import { LanguagePreferenceService } from './language-preference.service';
+
+@Injectable({ providedIn: 'root' })
+export class ShellLanguageService {
+  private readonly languagePreferenceService = inject(LanguagePreferenceService);
+
+  readonly languageCode = this.languagePreferenceService.languageCode;
+  readonly isLanguageConfirmed = this.languagePreferenceService.isLanguageConfirmed;
+  readonly content = computed<LanguageShellPack>(() => this.getPack(this.languageCode()));
+
+  initializeFromStorage(): LanguageCode {
+    return this.languagePreferenceService.initializeFromStorage();
+  }
+
+  confirmLanguage(code: LanguageCode): void {
+    this.languagePreferenceService.confirmLanguage(code);
+  }
+
+  getPack(code: LanguageCode): LanguageShellPack {
+    return code === 'de' ? deShellLanguage : enShellLanguage;
+  }
+}