fix: console保存时合并UI新增的source到下发请求

internal/web/ui.go

@@ -1301,15 +1301,27 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
             continue
         }
         var sources []string
+        // Merge: existing assignment sources + UI-added sources
+        sourceSet := map[string]struct{}{}
         if assignment, err := u.preview.GetDeviceAssignment(dev.DeviceID); err == nil && assignment != nil {
             for _, ref := range assignment.RecognitionUnits {
                 if unit, err := u.preview.GetRecognitionUnit(ref); err == nil && unit != nil {
                     if unit.VideoSourceRef != "" {
-                        sources = append(sources, unit.VideoSourceRef)
+                        sourceSet[unit.VideoSourceRef] = struct{}{}
                     }
                 }
             }
         }
+        // Read UI-added sources from form (JS adds device_xxx_source hidden inputs)
+        for _, src := range r.Form["device_"+dev.DeviceID+"_source"] {
+            src = strings.TrimSpace(src)
+            if src != "" {
+                sourceSet[src] = struct{}{}
+            }
+        }
+        for src := range sourceSet {
+            sources = append(sources, src)
+        }
         if len(features) == 0 {
             continue
         }