refactor(arch): eliminate direct service calls in components — route all through hooks

New hook files:
- useAuth.ts: useLogin, useSwitchDemoRole, useSwitchOrganization
- useAI.ts: useParseNeed, useGenerateOfferEmail, useGenerateDecisionBrief, useParseListingText
- useAssistant.ts: useAssistantSuggestions (useQuery), useAssistantAnswer (useMutation)
- useOfferReport.ts: useOfferReportByInquiry, useCreateOfferReport, useUpdateOfferReport, useGenerateOfferReportPdf
- useInquiryReport.ts: useInquiryReportByInquiry, useCreateInquiryReport, useUpdateInquiryReport, useFinalizeInquiryReport
- useMarketReport.ts: useMarketReport
- useWeighting.ts: useDefaultWeights (synchronous wrapper)
- useUnitMatches.ts: useUnitMatchesMap, useUnitBundle, useBundleMatches (useMemo wrappers)

Extended hooks: useProperties (add update/create/remove mutations),
useNeeds (add useCreateNeed), useMatches (add useNeedMatchesForProperty,
useAdditionalMatchesForInquiry), useReviewQueue (add useCreateReviewTask)

Updated 21 components/pages: all direct service imports replaced with hooks.
Deliberate exception: getRecommendedActions in DataQuality.tsx (pure sync utility, no provider access).

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

src/components/assistant/GlobalAIAssistantDrawer.tsx

@@ -5,13 +5,13 @@ import { useLocation } from 'react-router'
 import { useShallow } from 'zustand/react/shallow'
 import { useAssistantStore } from '../../stores/assistantStore'
 import { useSessionStore } from '../../stores/sessionStore'
-import { aiAssistantService } from '../../services/aiAssistantService'
+import { useAssistantSuggestions, useAssistantAnswer } from '../../hooks/useAssistant'
 import { AssistantContextSummary } from './AssistantContextSummary'
 import { AssistantMessageList } from './AssistantMessageList'
 import { AssistantPromptSuggestions } from './AssistantPromptSuggestions'
 import { AssistantLoadingState } from './AssistantLoadingState'
 import { AssistantErrorState } from './AssistantErrorState'
-import type { AssistantContext, SuggestedQuestion } from '../../domain/assistant'
+import type { AssistantContext } from '../../domain/assistant'
 import type { WorkspaceType } from '../../domain/enums'
 
 function resolveWorkspace(pathname: string): WorkspaceType | null {
@@ -27,24 +27,13 @@ export function GlobalAIAssistantDrawer() {
   const { currentUser } = useSessionStore()
   const location = useLocation()
 
-  const [suggestions, setSuggestions] = useState<SuggestedQuestion[]>([])
   const [inputText, setInputText] = useState('')
   const scrollRef = useRef<HTMLDivElement>(null)
 
-  // Build context from route when drawer opens
-  useEffect(() => {
-    if (!isOpen) return
-    const ctx: AssistantContext = {
-      currentRoute: location.pathname,
-      workspace: resolveWorkspace(location.pathname),
-      userRole: currentUser?.role ?? 'VIEWER',
-      organizationId: currentUser?.organizationId ?? '',
-    }
-    setContext(ctx)
-    aiAssistantService.getSuggestions(ctx).then(setSuggestions)
-  }, [isOpen, location.pathname])
+  const answerQuestion = useAssistantAnswer()
+  const { data: suggestions = [] } = useAssistantSuggestions(isOpen ? context : null)
 
-  // Refresh suggestions when route changes while open
+  // Build context from route when drawer opens or route changes while open
   useEffect(() => {
     if (!isOpen) return
     const ctx: AssistantContext = {
@@ -54,8 +43,7 @@ export function GlobalAIAssistantDrawer() {
       organizationId: currentUser?.organizationId ?? '',
     }
     setContext(ctx)
-    aiAssistantService.getSuggestions(ctx).then(setSuggestions)
-  }, [location.pathname])
+  }, [isOpen, location.pathname])
 
   // Auto-scroll on new messages
   useEffect(() => {
@@ -64,7 +52,7 @@ export function GlobalAIAssistantDrawer() {
     }
   }, [messages, isLoading])
 
-  const handleQuestion = useCallback(async (question: string) => {
+  const handleQuestion = useCallback((question: string) => {
     if (!question.trim() || isLoading) return
     setInputText('')
     setError(null)
@@ -78,26 +66,32 @@ export function GlobalAIAssistantDrawer() {
     addMessage(userMsg)
     setLoading(true)
 
-    try {
-      const ctx = context ?? {
-        currentRoute: location.pathname,
-        workspace: resolveWorkspace(location.pathname),
-        userRole: currentUser?.role ?? 'VIEWER',
-        organizationId: currentUser?.organizationId ?? '',
-      }
-      const answer = await aiAssistantService.answerQuestion(ctx, question)
-      addMessage({
-        id: crypto.randomUUID(),
-        role: 'assistant',
-        createdAt: new Date().toISOString(),
-        ...answer,
-      })
-    } catch {
-      setError('Antwort konnte nicht generiert werden. Bitte erneut versuchen.')
-    } finally {
-      setLoading(false)
+    const ctx = context ?? {
+      currentRoute: location.pathname,
+      workspace: resolveWorkspace(location.pathname),
+      userRole: currentUser?.role ?? 'VIEWER',
+      organizationId: currentUser?.organizationId ?? '',
     }
-  }, [context, isLoading, location.pathname, currentUser, addMessage, setLoading, setError])
+
+    answerQuestion.mutate(
+      { context: ctx, question },
+      {
+        onSuccess: (answer) => {
+          addMessage({
+            id: crypto.randomUUID(),
+            role: 'assistant',
+            createdAt: new Date().toISOString(),
+            ...answer,
+          })
+          setLoading(false)
+        },
+        onError: () => {
+          setError('Antwort konnte nicht generiert werden. Bitte erneut versuchen.')
+          setLoading(false)
+        },
+      },
+    )
+  }, [context, isLoading, location.pathname, currentUser, addMessage, setLoading, setError, answerQuestion])
 
   const handleKeyDown = (e: React.KeyboardEvent) => {
     if (e.key === 'Enter' && !e.shiftKey) {
@@ -108,10 +102,6 @@ export function GlobalAIAssistantDrawer() {
 
   const handleClear = () => {
     clearConversation()
-    setSuggestions([])
-    if (context) {
-      aiAssistantService.getSuggestions(context).then(setSuggestions)
-    }
   }
 
   const showSuggestions = suggestions.length > 0 && messages.length === 0