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/useAuth.ts

@@ -0,0 +1,31 @@
+import { useMutation } from '@tanstack/react-query'
+import { useNavigate } from 'react-router'
+import { authService } from '../services/authService'
+import type { UserRole } from '../domain/enums'
+
+export function useLogin() {
+  const navigate = useNavigate()
+  return useMutation({
+    mutationFn: ({ email, password }: { email: string; password: string }) =>
+      authService.login(email, password),
+    onSuccess: () => {
+      navigate('/')
+    },
+  })
+}
+
+export function useSwitchDemoRole() {
+  const navigate = useNavigate()
+  return useMutation({
+    mutationFn: (role: UserRole) => authService.switchDemoRole(role),
+    onSuccess: () => {
+      navigate('/')
+    },
+  })
+}
+
+export function useSwitchOrganization() {
+  return useMutation({
+    mutationFn: (organizationId: string) => authService.switchOrganization(organizationId),
+  })
+}