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/matchService.ts

@@ -1,6 +1,8 @@
 import { MockupMatchProvider } from '../provider/MockupMatchProvider'
+import { MockupPropertyProvider } from '../provider/MockupPropertyProvider'
 import type { MatchFilters } from '../provider/IMatchProvider'
 import type { Match } from '../domain/match'
+import type { StrongMatchItem } from '../domain/dashboard'
 import type { ListResponse, ItemResponse } from './types'
 
 const provider = MockupMatchProvider
@@ -26,4 +28,32 @@ export const matchService = {
     const data = await provider.approve(id, reviewedBy)
     return { data }
   },
+
+  async getStrongMatches(minScore = 80): Promise<StrongMatchItem[]> {
+    const [matches, properties] = await Promise.all([
+      provider.getAll(),
+      MockupPropertyProvider.getAll(),
+    ])
+    return matches
+      .filter(m => m.matchScore >= minScore)
+      .slice(0, 5)
+      .map(m => {
+        const prop = properties.find(p => p.id === m.propertyId)
+        const topFactor = m.positiveFactors?.[0]
+        const firstAction = m.nextBestActions?.[0]
+        return {
+          matchId: m.id,
+          propertyId: m.propertyId,
+          propertyTitle: prop?.title ?? 'Unbekanntes Objekt',
+          propertyAddress: prop?.address
+            ? `${prop.address.street} ${prop.address.houseNumber}, ${prop.address.city}`
+            : '–',
+          needSummary: m.needId,
+          matchScore: m.matchScore,
+          topReason: topFactor?.explanation ?? topFactor?.criterion ?? '–',
+          missingDataCount: m.missingData?.length ?? 0,
+          nextBestAction: firstAction?.label ?? '–',
+        } satisfies StrongMatchItem
+      })
+  },
 }