Use-Case-Mapping-Filter für Master Controls + Mapper-Präzisionsfix

Phase 2: Live-Filter an /sdk/master-controls (Use Case, Quell-Regulierung,
Verifikations-Methode, Coverage, Primärzweck-Toggle, category via Member-EXISTS).
API mit EXISTS-Filtern + gecachten Meta-Counts in master-controls/route.ts.

Phase A: neue UseCase telekommunikation + Fix der Impressum-Fehlrouten im
Register (TKG/AT-TKG->telekommunikation, telemedien->dse, GewO->handelsrecht);
echte Impressum-Quellen (TMG/Mediengesetz) bleiben impressum. Deterministischer
Seed aus source_regulation; Tests grün.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

admin-compliance/app/sdk/control-library/__tests__/mcMappingLabels.test.ts

@@ -0,0 +1,44 @@
+import { describe, it, expect } from 'vitest'
+import {
+  USE_CASE_LABELS, MC_VERIFICATION_LABELS, useCaseLabel, mcVerificationLabel,
+} from '../components/mcMappingLabels'
+
+describe('useCaseLabel', () => {
+  it('maps known use-case keys to German labels', () => {
+    expect(useCaseLabel('impressum')).toBe('Impressum')
+    expect(useCaseLabel('cookie_banner')).toBe('Cookie-Banner')
+    expect(useCaseLabel('code_security')).toBe('Code Security')
+    expect(useCaseLabel('dse')).toBe('Datenschutzerklärung')
+  })
+
+  it('humanizes an unknown key instead of showing the raw slug', () => {
+    expect(useCaseLabel('brand_new_thing')).toBe('Brand New Thing')
+  })
+})
+
+describe('mcVerificationLabel', () => {
+  it('maps the master-control verification methods', () => {
+    expect(mcVerificationLabel('source_code')).toBe('Source Code')
+    expect(mcVerificationLabel('it_process')).toBe('IT-Prozess')
+    expect(mcVerificationLabel('network')).toBe('Netzwerk/Infra')
+    expect(mcVerificationLabel('document')).toBe('Dokument')
+  })
+
+  it('humanizes an unknown method', () => {
+    expect(mcVerificationLabel('telepathy')).toBe('Telepathy')
+  })
+})
+
+describe('label coverage', () => {
+  it('labels the security/code use cases (>=50% code+process focus)', () => {
+    for (const k of ['code_security', 'network_security', 'cra', 'isms', 'tisax']) {
+      expect(USE_CASE_LABELS[k]).toBeTruthy()
+    }
+  })
+
+  it('covers every master-control verification method', () => {
+    for (const m of ['document', 'source_code', 'network', 'it_process', 'hybrid', 'manual']) {
+      expect(MC_VERIFICATION_LABELS[m]).toBeTruthy()
+    }
+  })
+})