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/hooks/useNeeds.ts

@@ -1,5 +1,6 @@
-import { useQuery } from '@tanstack/react-query'
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { needService } from '../services/needService'
+import type { CreateNeedInput } from '../domain/need'
 
 export function useNeeds() {
   return useQuery({
@@ -19,3 +20,13 @@ export function useNeed(id: string) {
 }
 
 export const useNeedProfiles = useNeeds
+
+export function useCreateNeed() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: (input: CreateNeedInput) => needService.create(input),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['needs'] })
+    },
+  })
+}