feat: Future Availability — Logiktrennung Supply/Demand + Markt-Leads

EXPANSION-Signale (Unternehmen sucht Fläche) sind Nachfragesignale und
gehören nicht in den Demand-Feed. Neue Architektur:

- signalDirection: 'SUPPLY' | 'DEMAND' auf FutureSignal-Domain
- SUPPLY-Signale: POSSIBLE_MOVE_OUT / CONSTRUCTION_PROJECT (Crawler)
  und LEASE_EXPIRY+isVerified (Verwaltung ERP) → Demand-Feed wie bisher
- DEMAND-Signale: EXPANSION → aus Demand-Feed gefiltert
- Neues useMarketLeads-Hook + /supply/market-leads Seite für Verwaltung:
  zeigt EXPANSION-Signale als potenzielle Mieter mit Portfolio-Matching
- Alle 15 Signale in futureSignals.ts inhaltlich bereinigt und
  mit korrekter signalDirection versehen

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

src/hooks/useMarketLeads.ts

@@ -0,0 +1,37 @@
+import { useMemo } from 'react'
+import { useFutureSignals } from './useFutureSignals'
+import { useProperties } from './useProperties'
+import type { FutureSignal } from '../domain/futureSignal'
+import type { Property } from '../domain/property'
+
+export interface MarketLead {
+  signal: FutureSignal
+  matchingProperties: Property[]
+}
+
+export function useMarketLeads(): { data: MarketLead[]; isLoading: boolean } {
+  const { data: signals = [], isLoading: signalsLoading } = useFutureSignals()
+  const { data: properties = [], isLoading: propertiesLoading } = useProperties()
+
+  const data = useMemo((): MarketLead[] => {
+    const demandSignals = signals.filter(s => s.signalDirection === 'DEMAND')
+
+    return demandSignals.map(signal => {
+      const signalCity = signal.locationHint.split(',')[0].trim().toLowerCase()
+
+      const matchingProperties = properties.filter(p => {
+        if (p.resultType !== 'VERIFIED_PORTFOLIO') return false
+        const propCity = (p.location?.city ?? '').toLowerCase()
+        const cityMatch = propCity.includes(signalCity) || signalCity.includes(propCity)
+        const areaOk = signal.areaSqmEstimate
+          ? p.areaSqm >= signal.areaSqmEstimate * 0.5 && p.areaSqm <= signal.areaSqmEstimate * 2.2
+          : true
+        return cityMatch && areaOk
+      })
+
+      return { signal, matchingProperties }
+    })
+  }, [signals, properties])
+
+  return { data, isLoading: signalsLoading || propertiesLoading }
+}

src/hooks/useUnifiedResults.ts

@@ -37,7 +37,7 @@ export function useUnifiedResults(needId?: string) {
         // Fast path: explicit FUTURE_AVAILABILITY on the match (no property lookup needed)
         if (match.resultType === 'FUTURE_AVAILABILITY') {
           const signal = allSignals.find(s => s.id === refId || s.propertyId === refId)
-          if (!signal) return []
+          if (!signal || signal.signalDirection === 'DEMAND') return []
           return [{ matchId: match.id, needId: match.needId, matchScore: match.matchScore,
             resultType: 'FUTURE_AVAILABILITY', signal, match }]
         }
@@ -51,7 +51,7 @@ export function useUnifiedResults(needId?: string) {
 
         if (rt === 'FUTURE_AVAILABILITY') {
           const signal = allSignals.find(s => s.id === refId || s.propertyId === refId)
-          if (!signal) return []
+          if (!signal || signal.signalDirection === 'DEMAND') return []
           return [{ matchId: match.id, needId: match.needId, matchScore: match.matchScore,
             resultType: 'FUTURE_AVAILABILITY', signal, match }]
         }