fix: 下发前强制刷新设备发现，避免 device offline 误判

internal/web/ui.go

@@ -1331,6 +1331,9 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
     }
 
     // Step 4: run pipeline (creates tasks asynchronously).
+    if u.discovery != nil {
+        u.discovery.SearchDefault()
+    }
     results, _ := u.autoConfig.BuildPipelineBatch(requests, true)
 
     // Collect task IDs for redirect.
@@ -1400,6 +1403,10 @@ func (u *UI) actionWizardApply(w http.ResponseWriter, r *http.Request) {
     if u.preview != nil && len(req.Features) > 0 {
         _ = u.preview.SaveDeviceFeatures(req.DeviceID, req.Features)
     }
+    // Force rediscovery so the task sees the device as online.
+    if u.discovery != nil {
+        u.discovery.SearchDefault()
+    }
     result, err := u.autoConfig.BuildPipeline(service.AutoConfigRequest{
         DeviceID:    req.DeviceID,
         Features:    req.Features,