fix(platform): keep dashboard metrics on preview failures

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

@@ -127,21 +127,21 @@ export function Dashboard({ onOpenVehicle, onOpenQuality, onOpenVehicles }: { on
   };
 
   useEffect(() => {
-    Promise.all([
-      api.dashboardSummary(),
-      api.vehicleServiceSummary(),
-      api.vehicleCoverage(new URLSearchParams({ limit: '8' })),
-      api.vehicleRealtime(new URLSearchParams({ limit: '8' })),
-      api.qualityIssues(new URLSearchParams({ limit: '5' }))
-    ])
-      .then(([nextSummary, nextServiceSummary, coveragePage, locationPage, qualityPage]) => {
-        setSummary(nextSummary);
-        setServiceSummary(nextServiceSummary);
-        setCoverage(coveragePage.items);
-        setLocations(locationPage.items);
-        setQualityIssues(qualityPage.items);
+    const tasks = [
+      api.dashboardSummary().then(setSummary),
+      api.vehicleServiceSummary().then(setServiceSummary),
+      api.vehicleCoverage(new URLSearchParams({ limit: '8' })).then((page) => setCoverage(page.items)),
+      api.vehicleRealtime(new URLSearchParams({ limit: '8' })).then((page) => setLocations(page.items)),
+      api.qualityIssues(new URLSearchParams({ limit: '5' })).then((page) => setQualityIssues(page.items))
+    ];
+    Promise.allSettled(tasks)
+      .then((results) => {
+        const failed = results.find((result) => result.status === 'rejected');
+        if (failed?.status === 'rejected') {
+          const reason = failed.reason;
+          Toast.error(reason instanceof Error ? reason.message : '总览数据加载失败');
+        }
       })
-      .catch((error: Error) => Toast.error(error.message))
       .finally(() => setLoading(false));
   }, []);