diff --git a/internal/web/ui.go b/internal/web/ui.go
index 9c2d0d2..0c5351a 100644
--- a/internal/web/ui.go
+++ b/internal/web/ui.go
@@ -1128,30 +1128,26 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
     u.ensureDevicesLoaded()
     devices := u.registry.GetDevices()
 
-    // Step 1: persist feature selections to DB (source of truth).
+    // Step 1: collect form features per device.
+    formFeatures := map[string][]string{}
     for _, dev := range devices {
         if dev == nil || dev.DeviceID == "" {
             continue
         }
         features := cleanFormList(r.Form["device_"+dev.DeviceID+"_feature"])
-        if err := u.preview.SaveDeviceFeatures(dev.DeviceID, features); err != nil {
-            http.Redirect(w, r, "/ui/console?error="+url.QueryEscape("保存功能配置失败: "+err.Error()), http.StatusFound)
-            return
+        if len(features) > 0 {
+            formFeatures[dev.DeviceID] = features
         }
     }
 
-    // Step 2: build requests from DB only.
-    // Features come from device_features table.
-    // Video sources come from existing device assignments and recognition units.
+    // Step 2: build requests using form features (user intent) and
+    // existing recognition unit video sources.
     var requests []service.AutoConfigRequest
     for _, dev := range devices {
         if dev == nil || dev.DeviceID == "" {
             continue
         }
-        features, err := u.preview.GetDeviceFeatures(dev.DeviceID)
-        if err != nil {
-            continue
-        }
+        features := formFeatures[dev.DeviceID]
         var sources []string
         if assignment, err := u.preview.GetDeviceAssignment(dev.DeviceID); err == nil && assignment != nil {
             for _, ref := range assignment.RecognitionUnits {
@@ -1162,7 +1158,7 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
                 }
             }
         }
-        if len(features) == 0 && len(sources) == 0 {
+        if len(features) == 0 {
             continue
         }
         requests = append(requests, service.AutoConfigRequest{
@@ -1173,12 +1169,22 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
     }
 
     if len(requests) == 0 {
-        http.Redirect(w, r, "/ui/console?msg="+url.QueryEscape("未选择检测功能或未分配视频源"), http.StatusFound)
+        http.Redirect(w, r, "/ui/console?msg="+url.QueryEscape("未选择检测功能"), http.StatusFound)
         return
     }
 
+    // Step 3: run pipeline. Only persist to DB on success.
     results, _ := u.autoConfig.BuildPipelineBatch(requests, true)
 
+    // Step 4: persist successful feature selections to DB.
+    for _, res := range results {
+        if res.Error == "" && res.TaskID != "" {
+            if feats, ok := formFeatures[res.DeviceID]; ok {
+                _ = u.preview.SaveDeviceFeatures(res.DeviceID, feats)
+            }
+        }
+    }
+
     // Collect task IDs for redirect.
     taskIDs := make([]string, 0)
     var errs []string
diff --git a/internal/web/ui/templates/console.html b/internal/web/ui/templates/console.html
index e0e632b..a4509a5 100644
--- a/internal/web/ui/templates/console.html
+++ b/internal/web/ui/templates/console.html
@@ -356,6 +356,10 @@
       });
     });
     if (!summary) { alert('未选择任何检测功能或视频源'); return; }
+    // Require at least one feature.
+    var hasFeature = false;
+    document.querySelectorAll('.console-device-row input[type=checkbox]:checked').forEach(function() { hasFeature = true; });
+    if (!hasFeature) { alert('请至少选择一项检测功能'); return; }
     var overlay = document.createElement('div');
     overlay.className = 'confirm-overlay';
     overlay.style.cssText = 'position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:9999;display:flex;align-items:center;justify-content:center';