fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

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

website/components/wizard/WizardProvider.tsx

@@ -0,0 +1,72 @@
+'use client'
+
+import { createContext, useContext, useState, ReactNode, useCallback } from 'react'
+import type { WizardStep, WizardContextValue, TestCategoryResult, FullTestResults } from './types'
+
+const WizardContext = createContext<WizardContextValue | null>(null)
+
+export function useWizard(): WizardContextValue {
+  const context = useContext(WizardContext)
+  if (!context) {
+    throw new Error('useWizard must be used within a WizardProvider')
+  }
+  return context
+}
+
+interface WizardProviderProps {
+  children: ReactNode
+  initialSteps: WizardStep[]
+  module: string
+}
+
+export function WizardProvider({ children, initialSteps, module }: WizardProviderProps) {
+  const [currentStep, setCurrentStep] = useState(0)
+  const [steps, setSteps] = useState<WizardStep[]>(initialSteps)
+  const [categoryResults, setCategoryResults] = useState<Record<string, TestCategoryResult>>({})
+  const [fullResults, setFullResults] = useState<FullTestResults | null>(null)
+  const [isLoading, setIsLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const goToNext = useCallback(() => {
+    if (currentStep < steps.length - 1) {
+      setSteps((prev) =>
+        prev.map((step, idx) =>
+          idx === currentStep && step.status === 'pending'
+            ? { ...step, status: 'completed' }
+            : step
+        )
+      )
+      setCurrentStep((prev) => prev + 1)
+    }
+  }, [currentStep, steps.length])
+
+  const goToPrev = useCallback(() => {
+    if (currentStep > 0) {
+      setCurrentStep((prev) => prev - 1)
+    }
+  }, [currentStep])
+
+  const value: WizardContextValue = {
+    currentStep,
+    steps,
+    setCurrentStep,
+    setSteps,
+    goToNext,
+    goToPrev,
+    module,
+    categoryResults,
+    setCategoryResults,
+    fullResults,
+    setFullResults,
+    isLoading,
+    setIsLoading,
+    error,
+    setError,
+  }
+
+  return (
+    <WizardContext.Provider value={value}>
+      {children}
+    </WizardContext.Provider>
+  )
+}