feat(advisor): Case Workspace v2 — Evidence grouping, human names, 3-column, summary

Reworks the advisor toward a Compliance Case Workspace (review feedback):
- Rename user-facing "Quellen" -> "Evidence".
- Evidence grouped by document/regulation family (count + expandable) — no more
  unsorted DSK/DSK/DPF/... jumble.
- Human-readable regulation names via a display registry (DSK Sdm B51 -> "DSK
  Standard-Datenschutzmodell (SDM)" / Kapitel B51); generic, bridges G2.
- Evidence summary "Antwort basiert auf" with meaningful counts; Regelwerke = distinct
  FAMILIES (fixes the inflated count). NO fabricated trust score (needs a defined basis).
- Expanded mode = 3-column workspace (question+summary | answer | evidence, independent
  scroll) + history switcher; narrow mode stays stacked.
- Prompt: push aggressive markdown structure (## per aspect, numbered phases).

Deferred/coordinated on board: C8 diagrams (RAG contract), answer<->evidence coupling
[1] (needs LLM citation anchors — phase 2), G1 retrieval relevance + G2 metadata (RAG).
tsc clean, 17 vitest, check-loc 0.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

admin-compliance/components/sdk/advisor/KnowledgeUnitCard.test.tsx

@@ -3,26 +3,29 @@ import { render } from '@testing-library/react'
 import { KnowledgeUnitCard } from './KnowledgeUnitCard'
 import type { KnowledgeUnit } from '@/lib/sdk/advisor/evidence'
 
-const base: KnowledgeUnit = { id: 's1', regulation: { code: 'dsk', short: 'DSK Sdm B51' } }
-
 describe('KnowledgeUnitCard', () => {
-  it('does not duplicate the regulation when label equals the short name', () => {
-    const { container } = render(<KnowledgeUnitCard unit={{ ...base, label: 'DSK Sdm B51' }} />)
-    const occurrences = (container.textContent?.match(/DSK Sdm B51/g) || []).length
-    expect(occurrences).toBe(1)
+  it('shows the friendly regulation name (not the raw code) when standalone', () => {
+    const unit: KnowledgeUnit = { id: 's1', regulation: { code: 'cra', short: 'CRA' } }
+    const { container } = render(<KnowledgeUnitCard unit={unit} />)
+    expect(container.textContent).toContain('Cyber Resilience Act (CRA)')
   })
 
-  it('shows the label when it differs from the short name (no breadcrumb)', () => {
-    const { container } = render(<KnowledgeUnitCard unit={{ ...base, label: 'Art. 30 DSGVO' }} />)
-    expect(container.textContent).toContain('DSK Sdm B51')
-    expect(container.textContent).toContain('Art. 30 DSGVO')
-  })
-
-  it('renders the section/paragraph breadcrumb when present', () => {
-    const { container } = render(
-      <KnowledgeUnitCard unit={{ ...base, section: 'Art. 5', paragraph: 'Abs. 2' }} />,
-    )
+  it('renders the section/paragraph breadcrumb', () => {
+    const unit: KnowledgeUnit = {
+      id: 's2',
+      regulation: { code: 'dsgvo', short: 'DSGVO' },
+      section: 'Art. 5',
+      paragraph: 'Abs. 2',
+    }
+    const { container } = render(<KnowledgeUnitCard unit={unit} />)
     expect(container.textContent).toContain('Art. 5')
     expect(container.textContent).toContain('Abs. 2')
   })
+
+  it('compact mode shows the chapter and omits the family name (group provides it)', () => {
+    const unit: KnowledgeUnit = { id: 's3', regulation: { code: 'dsk_sdm_b51', short: 'DSK Sdm B51' } }
+    const { container } = render(<KnowledgeUnitCard unit={unit} compact />)
+    expect(container.textContent).toContain('Kapitel B51')
+    expect(container.textContent).not.toContain('Standard-Datenschutzmodell')
+  })
 })