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>

breakpilot-compliance-sdk/packages/vue/src/composables/useRAG.ts

@@ -0,0 +1,136 @@
+/**
+ * RAG (Retrieval-Augmented Generation) composable
+ */
+
+import { computed, type ComputedRef, type Ref, ref, reactive } from 'vue'
+import { useComplianceStore } from '../plugin'
+import type {
+  SearchResponse,
+  AssistantResponse,
+  ChatMessage,
+  LegalDocument,
+} from '@breakpilot/compliance-sdk-types'
+
+export interface UseRAGReturn {
+  // Search
+  search: (query: string, regulationCodes?: string[]) => Promise<SearchResponse>
+  searchResults: Ref<SearchResponse | null>
+
+  // Chat
+  ask: (question: string, context?: string) => Promise<AssistantResponse>
+  chatHistory: Ref<ChatMessage[]>
+  clearChat: () => void
+  isTyping: Ref<boolean>
+
+  // Documents
+  documents: ComputedRef<LegalDocument[]>
+  availableRegulations: ComputedRef<string[]>
+
+  // Loading state
+  isLoading: Ref<boolean>
+  error: Ref<Error | null>
+}
+
+export function useRAG(): UseRAGReturn {
+  const store = useComplianceStore()
+  const { state, rag } = store
+
+  const isLoading = ref(false)
+  const isTyping = ref(false)
+  const error = ref<Error | null>(null)
+  const searchResults = ref<SearchResponse | null>(null)
+  const chatHistory = ref<ChatMessage[]>([])
+
+  // Search
+  const search = async (query: string, regulationCodes?: string[]): Promise<SearchResponse> => {
+    isLoading.value = true
+    error.value = null
+
+    try {
+      const results = await rag.search(query, regulationCodes)
+      searchResults.value = results
+      return results
+    } catch (err) {
+      error.value = err instanceof Error ? err : new Error(String(err))
+      throw err
+    } finally {
+      isLoading.value = false
+    }
+  }
+
+  // Chat
+  const ask = async (question: string, context?: string): Promise<AssistantResponse> => {
+    isLoading.value = true
+    isTyping.value = true
+    error.value = null
+
+    // Add user message to history
+    chatHistory.value.push({
+      id: `msg_${Date.now()}`,
+      role: 'user',
+      content: question,
+      timestamp: new Date().toISOString(),
+    })
+
+    try {
+      const response = await rag.ask(question, context)
+
+      // Add assistant response to history
+      chatHistory.value.push({
+        id: `msg_${Date.now()}`,
+        role: 'assistant',
+        content: response.answer,
+        timestamp: new Date().toISOString(),
+        citations: response.citations,
+      })
+
+      return response
+    } catch (err) {
+      error.value = err instanceof Error ? err : new Error(String(err))
+
+      // Add error message to history
+      chatHistory.value.push({
+        id: `msg_${Date.now()}`,
+        role: 'assistant',
+        content: 'Es ist ein Fehler aufgetreten. Bitte versuchen Sie es erneut.',
+        timestamp: new Date().toISOString(),
+      })
+
+      throw err
+    } finally {
+      isLoading.value = false
+      isTyping.value = false
+    }
+  }
+
+  const clearChat = (): void => {
+    chatHistory.value = []
+    rag.clearHistory()
+  }
+
+  // Documents
+  const documents = computed(() => state.legalDocuments)
+
+  const availableRegulations = computed(() => {
+    const codes = new Set<string>()
+    state.legalDocuments.forEach(doc => {
+      if (doc.regulationCode) {
+        codes.add(doc.regulationCode)
+      }
+    })
+    return Array.from(codes).sort()
+  })
+
+  return {
+    search,
+    searchResults,
+    ask,
+    chatHistory,
+    clearChat,
+    isTyping,
+    documents,
+    availableRegulations,
+    isLoading,
+    error,
+  }
+}