feat: supply card metrics — replace Prestige with Anfragen count

Senior property manager perspective: the three key metrics are
Fläche (size), Frei ab (availability date), and Anfragen (active
inquiry count). Anfragen box highlights amber when > 0. Rename
Datenkonfidenz → Datenvollständigkeit (clearer for the manager).
Remove ÖV chip, keep fit-out and contract chips as property specs.
Wire inquiryCount from useActiveInquiries in Properties page.

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

src/pages/supply/Properties.tsx

@@ -5,6 +5,7 @@ import { ChevronDown, ChevronUp } from 'lucide-react'
 import { PageHeader } from '../../components/layout'
 import { ViewToggle } from '../../components/shared'
 import { useProperties } from '../../hooks/useProperties'
+import { useActiveInquiries } from '../../hooks/useInquiries'
 import { PropertyFilterBar, PropertyTable, PropertyDetailView, PropertyIntelligenceCard } from '../../components/supply'
 import type { PropertyTableFilters } from '../../components/supply'
 import type { Property } from '../../domain/property'
@@ -61,6 +62,15 @@ export default function Properties() {
   )
 
   const { data: properties = [], isLoading, isError } = useProperties()
+  const { data: inquiries = [] } = useActiveInquiries()
+
+  const inquiryCountByProperty = useMemo(() => {
+    const map = new Map<string, number>()
+    for (const inq of inquiries) {
+      if (inq.propertyId) map.set(inq.propertyId, (map.get(inq.propertyId) ?? 0) + 1)
+    }
+    return map
+  }, [inquiries])
 
   const filtered = useMemo(() => applyFilters(properties, filters), [properties, filters])
 
@@ -193,7 +203,7 @@ export default function Properties() {
         {view === 'grid' ? (
           <Box sx={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(320px, 1fr))', gap: 2, p: 2.5 }}>
             {filtered.map(p => (
-              <PropertyIntelligenceCard key={p.id} property={p} onSelect={setSelectedId} />
+              <PropertyIntelligenceCard key={p.id} property={p} onSelect={setSelectedId} inquiryCount={inquiryCountByProperty.get(p.id) ?? 0} />
             ))}
           </Box>
         ) : (