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/components/supply/StrongMatchMiniCard.tsx

@@ -1,4 +1,5 @@
-import { Box, Card, CardContent, Chip, Typography } from '@mui/material'
+import { Box, Button, Card, CardContent, Chip, Typography } from '@mui/material'
+import { useNavigate } from 'react-router'
 import type { StrongMatchItem } from '../../domain/dashboard'
 
 interface StrongMatchMiniCardProps {
@@ -12,9 +13,11 @@ function scoreColor(score: number): string {
 }
 
 export function StrongMatchMiniCard({ match }: StrongMatchMiniCardProps) {
+  const navigate = useNavigate()
+
   return (
     <Card variant="outlined" sx={{ mb: 1 }}>
-      <CardContent sx={{ p: 2, '&:last-child': { pb: 2 } }}>
+      <CardContent sx={{ p: 2, '&:last-child': { pb: 1.5 } }}>
         <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start', mb: 0.5 }}>
           <Typography variant="body2" sx={{ fontWeight: 600, flex: 1 }}>
             {match.propertyTitle}
@@ -31,13 +34,15 @@ export function StrongMatchMiniCard({ match }: StrongMatchMiniCardProps) {
             }}
           />
         </Box>
+
         <Typography variant="caption" sx={{ color: 'text.secondary', display: 'block' }}>
           {match.propertyAddress}
         </Typography>
         <Typography variant="caption" sx={{ color: 'text.secondary', display: 'block', mt: 0.5 }}>
           {match.topReason}
         </Typography>
-        <Box sx={{ display: 'flex', gap: 1, mt: 1, flexWrap: 'wrap' }}>
+
+        <Box sx={{ display: 'flex', gap: 0.75, mt: 1, flexWrap: 'wrap', alignItems: 'center' }}>
           {match.missingDataCount > 0 && (
             <Chip
               label={`${match.missingDataCount} Felder fehlen`}
@@ -45,13 +50,33 @@ export function StrongMatchMiniCard({ match }: StrongMatchMiniCardProps) {
               color="warning"
             />
           )}
-          {match.nextBestAction !== '–' && (
-            <Chip
-              label={match.nextBestAction}
-              size="small"
-              variant="outlined"
-            />
-          )}
+        </Box>
+
+        <Box sx={{ display: 'flex', gap: 0.75, mt: 1.25, flexWrap: 'wrap' }}>
+          <Button
+            size="small"
+            variant="contained"
+            sx={{ textTransform: 'none', fontSize: '0.75rem', py: 0.25 }}
+            onClick={() => navigate('/supply/match-center')}
+          >
+            Match Center
+          </Button>
+          <Button
+            size="small"
+            variant="outlined"
+            sx={{ textTransform: 'none', fontSize: '0.75rem', py: 0.25 }}
+            onClick={() => navigate('/ops/review-queue')}
+          >
+            Zur Prüfung
+          </Button>
+          <Button
+            size="small"
+            variant="outlined"
+            sx={{ textTransform: 'none', fontSize: '0.75rem', py: 0.25 }}
+            onClick={() => navigate('/demand/compare')}
+          >
+            Vergleichen
+          </Button>
         </Box>
       </CardContent>
     </Card>