feat(frontend): warn if notes are dirty (#11772)

* feat(frontend): warn if notes are dirty

closes https://github.com/invenhost/InvenTree/issues/301

* fix type

* fix small style issues

* add changelog entry

* stop closing tab

src/frontend/src/components/editors/NotesEditor.tsx

@@ -25,15 +25,18 @@ import { useApi } from '../../contexts/ApiContext';
 export default function NotesEditor({
   modelType,
   modelId,
-  editable
+  editable,
+  setDirtyCallback
 }: Readonly<{
   modelType: ModelType;
   modelId: number;
   editable?: boolean;
+  setDirtyCallback?: (dirty: boolean) => void;
 }>) {
   const api = useApi();
   // In addition to the editable prop, we also need to check if the user has "enabled" editing
   const [editing, setEditing] = useState<boolean>(false);
+  const [localIsDirty, setLocalIsDirty] = useState<boolean>(false);
 
   const [markdown, setMarkdown] = useState<string>('');
 
@@ -42,6 +45,10 @@ export default function NotesEditor({
     setEditing(false);
   }, [editable, modelId, modelType]);
 
+  useEffect(() => {
+    setDirtyCallback?.(localIsDirty);
+  }, [localIsDirty]);
+
   const noteUrl: string = useMemo(() => {
     const modelInfo = ModelInformationDict[modelType];
     return apiUrl(modelInfo.api_endpoint, modelId);
@@ -121,6 +128,7 @@ export default function NotesEditor({
             id: 'notes',
             autoClose: 2000
           });
+          setLocalIsDirty(false);
         })
         .catch((error) => {
           notifications.hide('notes');
@@ -222,6 +230,7 @@ export default function NotesEditor({
       getMdeInstance={(instance: SimpleMde) => setMdeInstance(instance)}
       onChange={(value: string) => {
         setMarkdown(value);
+        setLocalIsDirty(true);
       }}
       options={editorOptions}
       value={markdown}

src/frontend/src/components/panels/NotesPanel.tsx

@@ -34,6 +34,7 @@ export default function NotesPanel({
         />
       ) : (
         <Skeleton />
-      )
+      ),
+    supportsDirty: true
   };
 }

src/frontend/src/components/panels/Panel.tsx

@@ -13,6 +13,7 @@ export type PanelType = {
   hidden?: boolean;
   disabled?: boolean;
   showHeadline?: boolean;
+  supportsDirty?: boolean;
 };
 
 export type PanelGroupType = {

src/frontend/src/components/panels/PanelGroup.tsx

@@ -39,6 +39,7 @@ import { cancelEvent } from '@lib/functions/Events';
 import { eventModified, getBaseUrl } from '@lib/functions/Navigation';
 import { navigateToLink } from '@lib/functions/Navigation';
 import { t } from '@lingui/core/macro';
+import { useWindowEvent } from '@mantine/hooks';
 import { useShallow } from 'zustand/react/shallow';
 import { generateUrl } from '../../functions/urls';
 import { usePluginPanels } from '../../hooks/UsePluginPanels';
@@ -173,6 +174,17 @@ function BasePanelGroup({
   const handlePanelChange = useCallback(
     (targetPanel: string, event?: any) => {
       cancelEvent(event);
+
+      // check if we are currently on a dirty panel, if so prompt the user to confirm navigation
+      if (isDirty) {
+        const confirm = globalThis.confirm(
+          t`You have unsaved changes, are you sure you want to navigate away from this panel?`
+        );
+        if (!confirm) {
+          return;
+        }
+      }
+
       if (event && eventModified(event)) {
         const url = `${location.pathname}/../${targetPanel}`;
         navigateToLink(url, navigate, event);
@@ -186,6 +198,9 @@ function BasePanelGroup({
       if (targetPanel && onPanelChange) {
         onPanelChange(targetPanel);
       }
+
+      // change dirty state
+      setIsDirty(false);
     },
     [activePanels, navigate, location, onPanelChange]
   );
@@ -206,6 +221,13 @@ function BasePanelGroup({
     }
   }, [activePanels, panel]);
 
+  const [isDirty, setIsDirty] = useState(false);
+  useWindowEvent('beforeunload', (event) => {
+    if (isDirty) {
+      event.preventDefault();
+    }
+  });
+
   return (
     <Boundary label={`PanelGroup-${pageKey}`}>
       <Paper p='sm' radius='xs' shadow='xs' aria-label={`${pageKey}`}>
@@ -341,7 +363,7 @@ function BasePanelGroup({
                       </>
                     )}
                     <Boundary label={`PanelContent-${panel.name}`}>
-                      {panel.content}
+                      {getPanelContent(panel.content, panel, setIsDirty)}
                     </Boundary>
                   </Stack>
                 </Tabs.Panel>
@@ -353,6 +375,39 @@ function BasePanelGroup({
   );
 }
 
+/*
+ * Helper function to inject the setIsDirty callback into panel content if supported
+ * This allows panels to mark themselves as dirty when changes are made, which will trigger a confirmation prompt when navigating away from the panel
+ */
+function getPanelContent(
+  content: ReactNode,
+  panel: PanelType,
+  setIsDirty?: (dirty: boolean) => void
+): ReactNode {
+  if (content === null) {
+    return null;
+  }
+
+  // pass setIsDirty callback to content if supported
+  if (
+    panel.supportsDirty &&
+    typeof content === 'object' &&
+    'props' in content &&
+    setIsDirty
+  ) {
+    return {
+      ...content,
+      props: {
+        ...(content.props || {}),
+        setDirtyCallback: setIsDirty
+      }
+    };
+  }
+
+  // normal content, just return as is
+  return content;
+}
+
 function IndexPanelComponent({
   pageKey,
   selectedPanel,