content: replace scaffolding with bilingual pages and case studies

Ship the final German and English copy, compose every route from shared page primitives, and cover claims, parity and contact briefing in tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/shared/content-section/content-section.ts

@@ -0,0 +1,14 @@
+import { ChangeDetectionStrategy, Component, computed, input } from '@angular/core';
+import { type SectionCopy } from '../../core/content/content.contracts';
+
+@Component({
+  selector: 'app-content-section',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  templateUrl: './content-section.html',
+  styleUrl: './content-section.scss',
+})
+export class ContentSection {
+  readonly section = input.required<SectionCopy>();
+
+  protected readonly headingId = computed(() => `section-${this.section().id}`);
+}