feat: collapsible filter bar, compact property cards, offer wizard field selection

- Properties page: collapsible decision/filter strip (localStorage state), slim
  single-row Datenpflege status bar (chips + button), 4-column card grid
- PropertyIntelligenceCard: reduced image height (160→120px), tighter body padding
- OfferWizard (latente Anfragen): new "Felder wählen" step between property
  selection and PDF preview; uses ReportObjectFieldSelector per property
- MockPdfPreview: adds second PDF page showing selected properties side by side
  with photo, title, location and all chosen hard/soft fact fields
- offerWizardStore: adds select_fields step type and fieldSelections state

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

src/components/anfragencenter/OfferPdfReviewStep.tsx

@@ -66,6 +66,8 @@ export function OfferPdfReviewStep() {
     }
   }
 
+  const fieldSelections = useOfferWizardStore(s => s.fieldSelections)
+
   const needTitle = useOfferWizardStore(s => s.needTitle)
   const addAttachment = useOfferWizardStore(s => s.addAttachment)
   const setMessageDraft = useOfferWizardStore(s => s.setMessageDraft)
@@ -128,7 +130,7 @@ export function OfferPdfReviewStep() {
               </Typography>
             </Box>
           ) : (
-            <MockPdfPreview fields={editableFieldsStore} fallbackFields={fallback} />
+            <MockPdfPreview fields={editableFieldsStore} fallbackFields={fallback} fieldSelections={fieldSelections} />
           )}
         </Box>