feat: F014 compare view — side-by-side decision table with AI summary

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

src/pages/demand/MatchDetail.tsx

@@ -42,6 +42,7 @@ export default function MatchDetail() {
 
   const isFuture = match?.resultType === 'FUTURE_AVAILABILITY'
 
+
   const { data: property = null } = useQuery({
     queryKey: ['property', match?.propertyId],
     queryFn: () => propertyService.getById(match!.propertyId),
@@ -85,10 +86,27 @@ export default function MatchDetail() {
   }
 
   const reasons = buildReasons(match)
-  const compareId = property?.id ?? ''
 
   const handleCompare = () => {
-    if (compareId) addToCompare(compareId)
+    if (match && !isFuture && property) {
+      addToCompare({
+        resultType: property.resultType === 'EXTERNAL_MARKET' ? 'EXTERNAL_MARKET' : 'VERIFIED_PORTFOLIO',
+        matchId: match.id,
+        needId: match.needId,
+        matchScore: match.matchScore,
+        match,
+        property,
+      })
+    } else if (match && isFuture && signal) {
+      addToCompare({
+        resultType: 'FUTURE_AVAILABILITY',
+        matchId: match.id,
+        needId: match.needId,
+        matchScore: match.matchScore,
+        match,
+        signal,
+      })
+    }
     navigate('/demand/compare')
   }