Add Imaginate help docs link to UI

editor/src/messages/portfolio/document/node_graph/node_graph_message_handler/node_properties.rs

@@ -691,6 +691,7 @@ pub fn imaginate_properties(document_node: &DocumentNode, node_id: NodeId, conte
 			ImaginateServerStatus::Connected => "Connected",
 		};
 		let widgets = vec![
+			vec![
 				WidgetHolder::text_widget("Server"),
 				WidgetHolder::unrelated_separator(),
 				IconButton::new("Settings", 24)
@@ -699,12 +700,34 @@ pub fn imaginate_properties(document_node: &DocumentNode, node_id: NodeId, conte
 					.widget_holder(),
 				WidgetHolder::unrelated_separator(),
 				WidgetHolder::bold_text(status),
+			],
+			if context.persistent_data.imaginate_server_status == ImaginateServerStatus::Unavailable {
+				vec![
+					WidgetHolder::unrelated_separator(),
+					TextButton::new("Help")
+						.tooltip("Learn how to connect Imaginate to an image generation server")
+						.on_update(|_| {
+							FrontendMessage::TriggerVisitLink {
+								url: "https://github.com/GraphiteEditor/Graphite/discussions/1089".to_string(),
+							}
+							.into()
+						})
+						.widget_holder(),
+				]
+			} else {
+				vec![]
+			},
+			vec![
 				WidgetHolder::related_separator(),
 				IconButton::new("Reload", 24)
 					.tooltip("Refresh connection status")
 					.on_update(|_| PortfolioMessage::ImaginateCheckServerStatus.into())
 					.widget_holder(),
-		];
+			],
+		]
+		.into_iter()
+		.flatten()
+		.collect();
 		LayoutGroup::Row { widgets }.with_tooltip("Connection status to the server that computes generated images")
 	};