feat: F021 market intelligence & signal discovery

Signal domain types, mock data (8 signals), provider interface + MockupMarketIntelligenceProvider, marketIntelligenceService, TanStack Query hooks, 10 ops components (SignalInbox, MarketSignalCard, MarketSignalFilterBar, MarketSignalSkeleton, MarketSignalEmptyState, SignalConfidenceBadge, SourceReliabilityBadge, SensitivityWarningPanel, SignalConversionPanel, SignalEvidenceList), MarketIntelligence page wired into AppShell nav and App router.

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

src/provider/MockupMarketIntelligenceProvider.ts

@@ -0,0 +1,70 @@
+import type { IMarketIntelligenceProvider } from './IMarketIntelligenceProvider'
+import type { MarketSignal, MarketSignalFilters, SignalProcessingStatus } from '../domain/marketSignal'
+import { MOCK_MARKET_SIGNALS } from '../mock-data/marketSignals'
+
+// Mutable in-memory copy for status updates
+let signals: MarketSignal[] = [...MOCK_MARKET_SIGNALS]
+
+function applyFilters(data: MarketSignal[], filters?: MarketSignalFilters): MarketSignal[] {
+  if (!filters) return data
+  return data.filter((s) => {
+    if (filters.sourceCategory && s.sourceCategory !== filters.sourceCategory) return false
+    if (filters.processingStatus && s.processingStatus !== filters.processingStatus) return false
+    if (filters.sensitivityLevel && s.sensitivityLevel !== filters.sensitivityLevel) return false
+    if (filters.signalType && s.signalType !== filters.signalType) return false
+    if (filters.search) {
+      const q = filters.search.toLowerCase()
+      const match = s.title.toLowerCase().includes(q)
+        || s.summary.toLowerCase().includes(q)
+        || s.location.toLowerCase().includes(q)
+      if (!match) return false
+    }
+    return true
+  })
+}
+
+export const MockupMarketIntelligenceProvider: IMarketIntelligenceProvider = {
+  async getSignals(filters?: MarketSignalFilters): Promise<MarketSignal[]> {
+    return applyFilters(signals, filters)
+  },
+
+  async getSignalById(id: string): Promise<MarketSignal | null> {
+    return signals.find((s) => s.id === id) ?? null
+  },
+
+  async updateSignalStatus(id: string, status: SignalProcessingStatus): Promise<MarketSignal> {
+    const idx = signals.findIndex((s) => s.id === id)
+    if (idx === -1) throw new Error(`Signal ${id} not found`)
+    signals[idx] = { ...signals[idx], processingStatus: status, updatedAt: new Date().toISOString() }
+    return signals[idx]
+  },
+
+  async convertToFutureSignal(id: string): Promise<{ futureSignalId: string }> {
+    const futureSignalId = `fs-${id}-${Date.now()}`
+    const idx = signals.findIndex((s) => s.id === id)
+    if (idx !== -1) {
+      signals[idx] = {
+        ...signals[idx],
+        processingStatus: 'CONVERTED_TO_FUTURE_AVAILABILITY',
+        possibleFutureSignalId: futureSignalId,
+        updatedAt: new Date().toISOString(),
+      }
+    }
+    return { futureSignalId }
+  },
+
+  async linkSignalToEntity(
+    id: string,
+    entityType: 'property' | 'need',
+    entityId: string,
+  ): Promise<MarketSignal> {
+    const idx = signals.findIndex((s) => s.id === id)
+    if (idx === -1) throw new Error(`Signal ${id} not found`)
+    signals[idx] = {
+      ...signals[idx],
+      ...(entityType === 'property' ? { linkedPropertyId: entityId } : { linkedNeedId: entityId }),
+      updatedAt: new Date().toISOString(),
+    }
+    return signals[idx]
+  },
+}