feat: Anfragencenter Parts A–E — read/unread, prep wizard, offer flow, report preview

- Part A: Replace InquiryStatus badges with WhatsApp-style unread indicators
  (isRead, unreadCount, lastReadAt on Inquiry; markThreadAsRead in service + hook)
- Part B: RelatedPropertyCardPanel — reposition "Objekt ansehen", add "Weitere
  Matches" section via matchService.getAdditionalMatchesForInquiry
- Part C: PreparationWizard 4-step dialog — property selection, report generation
  progress, field editing + ReportObjectFieldSelector, PDF preview + finalize
- Part D: OfferCreationWizard 4-step dialog triggered from first tenant message —
  data capture, field editing, viewing appointments, PDF generation + attach to reply
- Part E: LatentInquiryReportPreview (2-page A4 doc), ReportObjectFieldSelector
  (5 accordion groups, 35+ optional fields), mapImageUrl on Property domain

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

src/hooks/useInquiries.ts

@@ -1,7 +1,7 @@
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { inquiryService } from '../services/inquiryService'
 import type { InquiryFilters } from '../provider/IInquiryProvider'
-import type { InquiryStatus, Attachment } from '../domain/inquiry'
+import type { Attachment } from '../domain/inquiry'
 
 export function useActiveInquiries(filters?: InquiryFilters) {
   return useQuery({
@@ -37,12 +37,11 @@ export function useSendInquiryReply() {
   })
 }
 
-export function useUpdateInquiryStatus() {
+export function useMarkThreadAsRead() {
   const qc = useQueryClient()
   return useMutation({
-    mutationFn: ({ id, status }: { id: string; status: InquiryStatus }) =>
-      inquiryService.updateInquiryStatus(id, status),
-    onSuccess: (_data, { id }) => {
+    mutationFn: (id: string) => inquiryService.markThreadAsRead(id),
+    onSuccess: (_data, id) => {
       qc.invalidateQueries({ queryKey: ['inquiry', id] })
       qc.invalidateQueries({ queryKey: ['inquiries'] })
     },