feat: evidence_type Feld (code/process/hybrid) fuer Controls

Neues Feld auf canonical_controls klassifiziert, ob ein Control
technisch im Source Code (code), organisatorisch via Dokumente (process)
oder beides (hybrid) nachgewiesen wird. Inklusive Backfill-Endpoint,
Frontend-Badge/Filter und MkDocs-Dokumentation.

- Migration 079: evidence_type VARCHAR(20) + Index
- Backend: Filter, Backfill-Endpoint mit Domain-Heuristik, CRUD
- Frontend: EvidenceTypeBadge (sky/amber/violet), Nachweisart-Dropdown
- Proxy: evidence_type Passthrough fuer controls + controls-count
- Tests: 22 Tests fuer Klassifikations-Heuristik
- Docs: Eigenes MkDocs-Kapitel mit Mermaid-Diagramm

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-compliance/app/sdk/control-library/page.tsx

@@ -8,9 +8,9 @@ import {
 } from 'lucide-react'
 import {
   CanonicalControl, Framework, BACKEND_URL, EMPTY_CONTROL,
-  SeverityBadge, StateBadge, LicenseRuleBadge, VerificationMethodBadge, CategoryBadge, TargetAudienceBadge,
+  SeverityBadge, StateBadge, LicenseRuleBadge, VerificationMethodBadge, CategoryBadge, EvidenceTypeBadge, TargetAudienceBadge,
   GenerationStrategyBadge, ObligationTypeBadge,
-  VERIFICATION_METHODS, CATEGORY_OPTIONS, TARGET_AUDIENCE_OPTIONS,
+  VERIFICATION_METHODS, CATEGORY_OPTIONS, EVIDENCE_TYPE_OPTIONS, TARGET_AUDIENCE_OPTIONS,
 } from './components/helpers'
 import { ControlForm } from './components/ControlForm'
 import { ControlDetail } from './components/ControlDetail'
@@ -51,6 +51,7 @@ export default function ControlLibraryPage() {
   const [stateFilter, setStateFilter] = useState<string>('')
   const [verificationFilter, setVerificationFilter] = useState<string>('')
   const [categoryFilter, setCategoryFilter] = useState<string>('')
+  const [evidenceTypeFilter, setEvidenceTypeFilter] = useState<string>('')
   const [audienceFilter, setAudienceFilter] = useState<string>('')
   const [sourceFilter, setSourceFilter] = useState<string>('')
   const [typeFilter, setTypeFilter] = useState<string>('')
@@ -94,6 +95,7 @@ export default function ControlLibraryPage() {
     if (stateFilter) p.set('release_state', stateFilter)
     if (verificationFilter) p.set('verification_method', verificationFilter)
     if (categoryFilter) p.set('category', categoryFilter)
+    if (evidenceTypeFilter) p.set('evidence_type', evidenceTypeFilter)
     if (audienceFilter) p.set('target_audience', audienceFilter)
     if (sourceFilter) p.set('source', sourceFilter)
     if (typeFilter) p.set('control_type', typeFilter)
@@ -101,7 +103,7 @@ export default function ControlLibraryPage() {
     if (debouncedSearch) p.set('search', debouncedSearch)
     if (extra) for (const [k, v] of Object.entries(extra)) p.set(k, v)
     return p.toString()
-  }, [severityFilter, domainFilter, stateFilter, verificationFilter, categoryFilter, audienceFilter, sourceFilter, typeFilter, hideDuplicates, debouncedSearch])
+  }, [severityFilter, domainFilter, stateFilter, verificationFilter, categoryFilter, evidenceTypeFilter, audienceFilter, sourceFilter, typeFilter, hideDuplicates, debouncedSearch])
 
   // Load metadata (domains, sources — once + on refresh)
   const loadMeta = useCallback(async () => {
@@ -169,7 +171,7 @@ export default function ControlLibraryPage() {
   useEffect(() => { loadControls() }, [loadControls])
 
   // Reset page when filters change
-  useEffect(() => { setCurrentPage(1) }, [severityFilter, domainFilter, stateFilter, verificationFilter, categoryFilter, audienceFilter, sourceFilter, typeFilter, hideDuplicates, debouncedSearch, sortBy])
+  useEffect(() => { setCurrentPage(1) }, [severityFilter, domainFilter, stateFilter, verificationFilter, categoryFilter, evidenceTypeFilter, audienceFilter, sourceFilter, typeFilter, hideDuplicates, debouncedSearch, sortBy])
 
   // Pagination
   const totalPages = Math.max(1, Math.ceil(totalCount / PAGE_SIZE))
@@ -654,6 +656,16 @@ export default function ControlLibraryPage() {
                 <option key={c.value} value={c.value}>{c.label}</option>
               ))}
             </select>
+            <select
+              value={evidenceTypeFilter}
+              onChange={e => setEvidenceTypeFilter(e.target.value)}
+              className="text-sm border border-gray-300 rounded-lg px-2 py-1.5 focus:outline-none focus:ring-2 focus:ring-purple-500"
+            >
+              <option value="">Nachweisart</option>
+              {EVIDENCE_TYPE_OPTIONS.map(c => (
+                <option key={c.value} value={c.value}>{c.label}</option>
+              ))}
+            </select>
             <select
               value={audienceFilter}
               onChange={e => setAudienceFilter(e.target.value)}
@@ -792,6 +804,7 @@ export default function ControlLibraryPage() {
                     <LicenseRuleBadge rule={ctrl.license_rule} />
                     <VerificationMethodBadge method={ctrl.verification_method} />
                     <CategoryBadge category={ctrl.category} />
+                    <EvidenceTypeBadge type={ctrl.evidence_type} />
                     <TargetAudienceBadge audience={ctrl.target_audience} />
                     <GenerationStrategyBadge strategy={ctrl.generation_strategy} />
                     <ObligationTypeBadge type={ctrl.generation_metadata?.obligation_type as string} />