feat(platform): summarize missing vehicle sources

vehicle-data-platform/apps/web/src/pages/Dashboard.tsx

@@ -120,6 +120,7 @@ export function Dashboard({ onOpenVehicle, onOpenQuality, onOpenVehicles }: { on
     { label: '暂无来源车辆', value: formatCount(serviceSummary?.noDataVehicles), filters: { serviceStatus: 'no_data' } },
     { label: '身份未绑定', value: formatCount(serviceSummary?.identityRequiredVehicles), filters: { serviceStatus: 'identity_required' } }
   ];
+  const missingSourceCounts = new Map((serviceSummary?.missingSources ?? []).map((item) => [item.protocol, item.count]));
 
   return (
     <div className="vp-page">
@@ -175,6 +176,24 @@ export function Dashboard({ onOpenVehicle, onOpenQuality, onOpenVehicles }: { on
                   {
                     title: '在线率',
                     render: (_: unknown, row: ProtocolStat) => `${Math.round((row.online / row.total) * 100)}%`
+                  },
+                  {
+                    title: '缺失车辆',
+                    render: (_: unknown, row: ProtocolStat) => {
+                      const missingCount = missingSourceCounts.get(row.protocol);
+                      if (missingCount == null) {
+                        return '-';
+                      }
+                      return (
+                        <Button
+                          aria-label={`查看缺 ${row.protocol}`}
+                          size="small"
+                          onClick={() => loadCoverage({ missingProtocol: row.protocol })}
+                        >
+                          {formatCount(missingCount)}
+                        </Button>
+                      );
+                    }
                   }
                 ]}
               />