refactor(admin): split 9 more oversized lib/ files into focused modules

Files split by agents before rate limit:
  - dsr/api.ts (669 → barrel + helpers)
  - einwilligungen/context.tsx (669 → barrel + hooks/reducer)
  - export.ts (753 → barrel + domain exporters)
  - incidents/api.ts (845 → barrel + api-helpers)
  - tom-generator/context.tsx (720 → barrel + hooks/reducer)
  - vendor-compliance/context.tsx (1010 → 234 provider + hooks/reducer)
  - api-docs/endpoints.ts — partially split (3 domain files created)
  - academy/api.ts — partially split (helpers extracted)
  - whistleblower/api.ts — partially split (helpers extracted)

next build passes. api-client.ts (885) deferred to next session.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/lib/sdk/vendor-compliance/reducer.ts

@@ -0,0 +1,178 @@
+import {
+  VendorComplianceState,
+  VendorComplianceAction,
+} from './types'
+
+// ==========================================
+// INITIAL STATE
+// ==========================================
+
+export const initialState: VendorComplianceState = {
+  processingActivities: [],
+  vendors: [],
+  contracts: [],
+  findings: [],
+  controls: [],
+  controlInstances: [],
+  riskAssessments: [],
+  isLoading: false,
+  error: null,
+  selectedVendorId: null,
+  selectedActivityId: null,
+  activeTab: 'overview',
+  lastModified: null,
+}
+
+// ==========================================
+// REDUCER
+// ==========================================
+
+export function vendorComplianceReducer(
+  state: VendorComplianceState,
+  action: VendorComplianceAction
+): VendorComplianceState {
+  const updateState = (updates: Partial<VendorComplianceState>): VendorComplianceState => ({
+    ...state,
+    ...updates,
+    lastModified: new Date(),
+  })
+
+  switch (action.type) {
+    // Processing Activities
+    case 'SET_PROCESSING_ACTIVITIES':
+      return updateState({ processingActivities: action.payload })
+
+    case 'ADD_PROCESSING_ACTIVITY':
+      return updateState({
+        processingActivities: [...state.processingActivities, action.payload],
+      })
+
+    case 'UPDATE_PROCESSING_ACTIVITY':
+      return updateState({
+        processingActivities: state.processingActivities.map((activity) =>
+          activity.id === action.payload.id
+            ? { ...activity, ...action.payload.data, updatedAt: new Date() }
+            : activity
+        ),
+      })
+
+    case 'DELETE_PROCESSING_ACTIVITY':
+      return updateState({
+        processingActivities: state.processingActivities.filter(
+          (activity) => activity.id !== action.payload
+        ),
+      })
+
+    // Vendors
+    case 'SET_VENDORS':
+      return updateState({ vendors: action.payload })
+
+    case 'ADD_VENDOR':
+      return updateState({
+        vendors: [...state.vendors, action.payload],
+      })
+
+    case 'UPDATE_VENDOR':
+      return updateState({
+        vendors: state.vendors.map((vendor) =>
+          vendor.id === action.payload.id
+            ? { ...vendor, ...action.payload.data, updatedAt: new Date() }
+            : vendor
+        ),
+      })
+
+    case 'DELETE_VENDOR':
+      return updateState({
+        vendors: state.vendors.filter((vendor) => vendor.id !== action.payload),
+      })
+
+    // Contracts
+    case 'SET_CONTRACTS':
+      return updateState({ contracts: action.payload })
+
+    case 'ADD_CONTRACT':
+      return updateState({
+        contracts: [...state.contracts, action.payload],
+      })
+
+    case 'UPDATE_CONTRACT':
+      return updateState({
+        contracts: state.contracts.map((contract) =>
+          contract.id === action.payload.id
+            ? { ...contract, ...action.payload.data, updatedAt: new Date() }
+            : contract
+        ),
+      })
+
+    case 'DELETE_CONTRACT':
+      return updateState({
+        contracts: state.contracts.filter((contract) => contract.id !== action.payload),
+      })
+
+    // Findings
+    case 'SET_FINDINGS':
+      return updateState({ findings: action.payload })
+
+    case 'ADD_FINDINGS':
+      return updateState({
+        findings: [...state.findings, ...action.payload],
+      })
+
+    case 'UPDATE_FINDING':
+      return updateState({
+        findings: state.findings.map((finding) =>
+          finding.id === action.payload.id
+            ? { ...finding, ...action.payload.data, updatedAt: new Date() }
+            : finding
+        ),
+      })
+
+    // Controls
+    case 'SET_CONTROLS':
+      return updateState({ controls: action.payload })
+
+    case 'SET_CONTROL_INSTANCES':
+      return updateState({ controlInstances: action.payload })
+
+    case 'UPDATE_CONTROL_INSTANCE':
+      return updateState({
+        controlInstances: state.controlInstances.map((instance) =>
+          instance.id === action.payload.id
+            ? { ...instance, ...action.payload.data }
+            : instance
+        ),
+      })
+
+    // Risk Assessments
+    case 'SET_RISK_ASSESSMENTS':
+      return updateState({ riskAssessments: action.payload })
+
+    case 'UPDATE_RISK_ASSESSMENT':
+      return updateState({
+        riskAssessments: state.riskAssessments.map((assessment) =>
+          assessment.id === action.payload.id
+            ? { ...assessment, ...action.payload.data }
+            : assessment
+        ),
+      })
+
+    // UI State
+    case 'SET_LOADING':
+      return { ...state, isLoading: action.payload }
+
+    case 'SET_ERROR':
+      return { ...state, error: action.payload }
+
+    case 'SET_SELECTED_VENDOR':
+      return { ...state, selectedVendorId: action.payload }
+
+    case 'SET_SELECTED_ACTIVITY':
+      return { ...state, selectedActivityId: action.payload }
+
+    case 'SET_ACTIVE_TAB':
+      return { ...state, activeTab: action.payload }
+
+    default:
+      return state
+  }
+}