feat: F016 future availability workspace

2-panel workspace at /supply/future-availability: filterable signal list with FutureSignalCard (type/sensitivity/review badges + mandatory disclaimer) and collapsible detail panel with full evidence, review workflow (IN_REVIEW→APPROVED/REJECTED), shortlist action, and review task creation.

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

src/services/futureSignalService.ts

@@ -1,6 +1,7 @@
 import { MockupFutureSignalProvider } from '../provider/MockupFutureSignalProvider'
 import type { FutureSignalFilters } from '../provider/IFutureSignalProvider'
 import type { FutureSignal } from '../domain/futureSignal'
+import type { ReviewStatus } from '../domain/enums'
 import type { FutureSignalSummary } from '../domain/dashboard'
 import type { ListResponse, ItemResponse } from './types'
 
@@ -23,6 +24,10 @@ export const futureSignalService = {
     const data = await provider.verify(id, verifiedBy)
     return { data }
   },
+  async updateReviewStatus(id: string, status: ReviewStatus): Promise<ItemResponse<FutureSignal>> {
+    const data = await provider.updateReviewStatus(id, status)
+    return { data }
+  },
 
   async getSignalsForProperty(propertyId: string): Promise<ListResponse<FutureSignal>> {
     const data = await provider.getByProperty(propertyId)