fix(compliance-scope): Race Condition bei State-Persistenz beheben

SDK Context laedt State asynchron vom Server. Die Page las bei Mount
sdkState.complianceScope (noch null), fiel auf leeres localStorage
zurueck, und der Save-Effect ueberschrieb dann den echten State mit
leeren Daten. Fix: sdkState.complianceScope wird jetzt reaktiv
beobachtet, und leere States werden nie zurueckgeschrieben.

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

admin-compliance/app/sdk/compliance-scope/page.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import React, { useState, useEffect, useCallback, useMemo } from 'react'
+import React, { useState, useEffect, useCallback, useMemo, useRef } from 'react'
 import { useSDK } from '@/lib/sdk'
 import { StepHeader, STEP_EXPLANATIONS } from '@/components/sdk/StepHeader/StepHeader'
 import {
@@ -53,36 +53,41 @@ export default function ComplianceScopePage() {
   const [isLoading, setIsLoading] = useState(true)
   const [isEvaluating, setIsEvaluating] = useState(false)
 
+  // Guard against save-loop: tracks whether we're syncing FROM SDK → local state
+  const syncingFromSdk = useRef(false)
+
   // Regulation assessment state
   const [applicableRegulations, setApplicableRegulations] = useState<ApplicableRegulation[]>([])
   const [supervisoryAuthorities, setSupervisoryAuthorities] = useState<SupervisoryAuthorityInfo[]>([])
   const [regulationAssessmentLoading, setRegulationAssessmentLoading] = useState(false)
 
-  // Load from SDK context first (persisted via State API), then localStorage as fallback.
-  // Runs ONCE on mount only — empty deps breaks the dispatch→sdkState→setScopeState→dispatch loop.
+  // Sync from SDK context when it becomes available (handles async loading).
+  // The SDK context loads state from server/localStorage asynchronously, so
+  // sdkState.complianceScope may arrive AFTER this page has already mounted.
   useEffect(() => {
-    try {
-      // Priority 1: SDK context (loaded from PostgreSQL via State API)
-      const ctxScope = sdkState.complianceScope
-      if (ctxScope && ctxScope.answers?.length > 0) {
-        setScopeState(ctxScope)
-        localStorage.setItem(STORAGE_KEY, JSON.stringify(ctxScope))
-      } else {
-        // Priority 2: localStorage fallback
+    const ctxScope = sdkState.complianceScope
+    if (ctxScope && ctxScope.answers?.length > 0) {
+      syncingFromSdk.current = true
+      setScopeState(ctxScope)
+      setIsLoading(false)
+    } else if (isLoading) {
+      // SDK has no scope data — try localStorage fallback, then give up
+      try {
         const stored = localStorage.getItem(STORAGE_KEY)
         if (stored) {
           const parsed = JSON.parse(stored) as ComplianceScopeState
-          setScopeState(parsed)
-          dispatch({ type: 'SET_COMPLIANCE_SCOPE', payload: parsed })
+          if (parsed.answers?.length > 0) {
+            setScopeState(parsed)
+            dispatch({ type: 'SET_COMPLIANCE_SCOPE', payload: parsed })
+          }
         }
+      } catch (error) {
+        console.error('Failed to load compliance scope from localStorage:', error)
       }
-    } catch (error) {
-      console.error('Failed to load compliance scope state:', error)
-    } finally {
       setIsLoading(false)
     }
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [])
+  }, [sdkState.complianceScope])
 
   // Fetch regulation assessment if decision exists on mount
   useEffect(() => {
@@ -92,9 +97,14 @@ export default function ComplianceScopePage() {
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [isLoading])
 
-  // Save to localStorage and SDK context whenever state changes
+  // Save to localStorage and SDK context whenever LOCAL state changes (user edits).
+  // Guarded: don't save empty state, and don't echo back what we just loaded from SDK.
   useEffect(() => {
-    if (!isLoading) {
+    if (!isLoading && scopeState.answers.length > 0) {
+      if (syncingFromSdk.current) {
+        syncingFromSdk.current = false
+        return
+      }
       try {
         localStorage.setItem(STORAGE_KEY, JSON.stringify(scopeState))
         dispatch({ type: 'SET_COMPLIANCE_SCOPE', payload: scopeState })