feat: F027 screen-level decision design — DecisionContextPanel + Properties + Results

- Add DecisionContextPanel (src/components/ui): compact decision-framing
  strip with question, metric chips, expandable risks/missing data, actions.
  Answers: Welche Entscheidung? Welche Daten helfen/fehlen? Welche Risiken?
  Welche nächste Aktion?

- Properties.tsx: replace generic listing header with decision frame:
  "Welche Objekte sind matchbereit und wo blockieren Datenlücken Matches?"
  Surfaces: matchbereit count, critical gaps, low-confidence count, stale
  data, missing field names, risk statements. Primary CTA → Datenpflege.

- Results.tsx: add decision frame above result feed:
  "Welche Treffer lohnen sich für die Shortlist — welche tragen Risiken?"
  Surfaces: strong-match count, result-type breakdown, data-gap count,
  future-signal probabilistic risk warning. CTAs → Compare, refine search.

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

src/pages/demand/Results.tsx

@@ -4,6 +4,7 @@ import { useNavigate, useLocation } from 'react-router'
 import { useQuery, useQueryClient } from '@tanstack/react-query'
 import { useUnifiedResults } from '../../hooks/useUnifiedResults'
 import { needService } from '../../services/needService'
+import { DecisionContextPanel } from '../../components/ui'
 import {
   FeedEmptyState,
   FeedSkeleton,
@@ -71,9 +72,14 @@ export default function Results() {
   const verifiedCount = results.filter(r => r.resultType === 'VERIFIED_PORTFOLIO').length
   const externalCount = results.filter(r => r.resultType === 'EXTERNAL_MARKET').length
   const futureCount   = results.filter(r => r.resultType === 'FUTURE_AVAILABILITY').length
+  const strongCount   = results.filter(r => r.matchScore >= 80).length
+  const missingDataCount = results.filter(r =>
+    'match' in r && Array.isArray((r as { match?: { missingData?: unknown[] } }).match?.missingData) &&
+    ((r as { match?: { missingData?: unknown[] } }).match?.missingData?.length ?? 0) > 0
+  ).length
 
   return (
-    <Box>
+    <Box sx={{ display: 'flex', flexDirection: 'column', height: '100%', overflow: 'hidden' }}>
       <AddToShortlistDialog />
       <ResultFeedHeader
         total={sorted.length}
@@ -82,7 +88,29 @@ export default function Results() {
         futureCount={futureCount}
       />
 
-      <Box sx={{ px: 3, py: 3 }}>
+      {!isLoading && results.length > 0 && (
+        <DecisionContextPanel
+          decision="Welche Treffer lohnen sich für die Shortlist — und welche tragen Risiken, die zuerst geprüft werden müssen?"
+          context={activeNeed ? `Suche: ${activeNeed.assetType} · ${activeNeed.requiredArea.min}–${activeNeed.requiredArea.max} m² · ${activeNeed.preferredLocations.join(', ')}` : undefined}
+          metrics={[
+            ...(strongCount > 0 ? [{ label: 'starke Treffer (≥80)', value: strongCount, severity: 'positive' as const }] : []),
+            ...(verifiedCount > 0 ? [{ label: 'verifiziertes Portfolio', value: verifiedCount, severity: 'neutral' as const }] : []),
+            ...(externalCount > 0 ? [{ label: 'externer Markt', value: externalCount, severity: 'neutral' as const }] : []),
+            ...(futureCount > 0 ? [{ label: 'Zukunftssignale', value: futureCount, severity: 'warning' as const }] : []),
+            ...(missingDataCount > 0 ? [{ label: 'mit Datenlücken', value: missingDataCount, severity: 'warning' as const }] : []),
+          ]}
+          risks={[
+            ...(futureCount > 0 ? [`${futureCount} Zukunftssignal${futureCount > 1 ? 'e' : ''} sind probabilistisch — keine bestätigte Verfügbarkeit`] : []),
+            ...(missingDataCount > 0 ? [`${missingDataCount} Treffer mit fehlenden Daten — Einschätzung eingeschränkt`] : []),
+          ]}
+          actions={[
+            { label: 'Vergleich öffnen', onClick: () => navigate('/demand/compare') },
+            { label: 'Suche anpassen', onClick: () => navigate('/demand/ai-search') },
+          ]}
+        />
+      )}
+
+      <Box sx={{ flex: 1, overflowY: 'auto', px: 3, py: 3 }}>
         {activeNeed && (
           <Card sx={{ bgcolor: '#eff6ff', p: 2, mb: 2, border: '1px solid #bfdbfe' }}>
             <Box sx={{ display: 'flex', alignItems: 'flex-start', justifyContent: 'space-between', gap: 2 }}>