feat: F006 supply dashboard — complete spec implementation

- dataQualityService with getPortfolioQualitySummary()
- Service methods: getDashboardPropertiesSummary, getStrongMatches,
  getSignalSummary, getDashboardTasks added to respective services
- dashboardService uses Promise.allSettled for partial error resilience
- KpiCard: onClick + Tooltip support
- KpiGrid: navigate actions and tooltips per card
- StrongMatchMiniCard: Match Center, Prüfung, Vergleichen action buttons
- FutureSignalWidget: time horizon distribution (0–6, 6–12, 12–24 Mo.)
- SupplyDashboard: DashboardHeader, empty state, error state,
  partial widget errors, permission-based rendering per UserRole

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

src/services/reviewService.ts

@@ -1,6 +1,7 @@
 import { MockupReviewProvider } from '../provider/MockupReviewProvider'
 import type { ReviewFilters } from '../provider/IReviewProvider'
 import type { ReviewQueueItem } from '../domain/review'
+import type { DashboardReviewTask } from '../domain/dashboard'
 import type { ListResponse, ItemResponse } from './types'
 
 const provider = MockupReviewProvider
@@ -26,4 +27,20 @@ export const reviewService = {
     const data = await provider.assign(id, assignTo)
     return { data }
   },
+
+  async createReviewTask(signalId: string): Promise<ItemResponse<{ taskId: string }>> {
+    const taskId = `rt-${signalId}-${Date.now()}`
+    return { data: { taskId } }
+  },
+
+  async getDashboardTasks(): Promise<DashboardReviewTask[]> {
+    const items = await provider.getQueue()
+    return items.slice(0, 8).map(r => ({
+      id: r.id,
+      title: `Match ${r.matchId} · Score ${r.matchScore}`,
+      priority: r.priority,
+      status: r.status,
+      type: 'REVIEW',
+    }))
+  },
 }