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/OfferWizard.tsx

@@ -12,22 +12,25 @@ import {
 import { X } from 'lucide-react'
 import { useOfferWizardStore, type OfferStep } from '../../stores/offerWizardStore'
 import { OfferPropertySelectionStep } from './OfferPropertySelectionStep'
+import { OfferFieldSelectionStep } from './OfferFieldSelectionStep'
 import { OfferPdfReviewStep } from './OfferPdfReviewStep'
 import { OfferCheckedAction } from './OfferCheckedAction'
 import { OfferChatComposer } from './OfferChatComposer'
 
-// 'checked' is internal — merged into pdf_review step; only 3 steps shown
+// 'checked' is internal — merged into pdf_review step; 4 visible steps
 const STEPS: { key: OfferStep; label: string }[] = [
   { key: 'select_properties', label: 'Objekte wählen' },
+  { key: 'select_fields',     label: 'Felder wählen' },
   { key: 'pdf_review',        label: 'Vorschau & Prüfen' },
   { key: 'send',              label: 'Senden' },
 ]
 
 const STEP_DISPLAY_INDEX: Record<OfferStep, number> = {
   select_properties: 0,
-  pdf_review: 1,
-  checked: 1, // same visual step as pdf_review
-  send: 2,
+  select_fields: 1,
+  pdf_review: 2,
+  checked: 2, // same visual step as pdf_review
+  send: 3,
 }
 
 export function OfferWizard() {
@@ -114,6 +117,7 @@ export function OfferWizard() {
       {/* Step content */}
       <Box sx={{ flex: 1, overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
         {currentStep === 'select_properties' && <OfferPropertySelectionStep />}
+        {currentStep === 'select_fields' && <OfferFieldSelectionStep />}
         {currentStep === 'pdf_review' && <OfferPdfReviewStep />}
         {currentStep === 'checked' && <OfferCheckedAction />}
         {currentStep === 'send' && <OfferChatComposer />}