Fix Project Explorer not refreshing source containers after drag-and-drop move

Fixes eclipse-platform#3525

Author: Copilot

bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java

@@ -229,6 +229,21 @@ public IStatus handleDrop(CommonDropAdapter aDropAdapter,
 			} catch (CoreException e) {
 			}
 		}
+		// Also refresh the source containers when moving resources
+		// to ensure they are properly removed from the UI
+		if (resources != null && resources.length > 0
+				&& aDropAdapter.getCurrentOperation() != DND.DROP_COPY
+				&& aDropAdapter.getCurrentOperation() != DND.DROP_LINK) {
+			for (IResource resource : resources) {
+				IContainer parent = resource.getParent();
+				if (parent != null && parent.isAccessible() && !parent.equals(target)) {
+					try {
+						parent.refreshLocal(IResource.DEPTH_ONE, null);
+					} catch (CoreException e) {
+					}
+				}
+			}
+		}
 		return status;
 	}
 
@@ -293,6 +308,17 @@ public IStatus handlePluginTransferDrop(IStructuredSelection aDragSelection, Obj
 			} catch (CoreException e) {
 			}
 		}
+		// Also refresh the source containers when moving resources
+		// to ensure they are properly removed from the UI
+		for (IResource resource : resources) {
+			IContainer parent = resource.getParent();
+			if (parent != null && parent.isAccessible() && !parent.equals(target)) {
+				try {
+					parent.refreshLocal(IResource.DEPTH_ONE, null);
+				} catch (CoreException e) {
+				}
+			}
+		}
 		return Status.OK_STATUS;
 	}