Add playwright test

src/frontend/src/components/nav/NavigationTree.tsx

@@ -374,6 +374,7 @@ export default function NavigationTree({
     >
       <Stack gap='xs'>
         <TextInput
+          aria-label='nav-tree-search'
           placeholder={t`Search...`}
           value={searchValue}
           onChange={(event) => setSearchValue(event.currentTarget.value)}

src/frontend/tests/pages/pui_stock.spec.ts

@@ -70,6 +70,24 @@ test('Stock - Location Tree', async ({ browser }) => {
   await page.getByLabel('breadcrumb-1-factory').click();
 
   await page.getByRole('cell', { name: 'Factory' }).first().waitFor();
+
+  // Load the tree again - from a deeply nested location
+  // We expect it to auto-expand to the current location
+  await navigate(page, 'stock/location/17/stock-items');
+  await page.getByLabel('nav-breadcrumb-action').click();
+
+  for (let ii = 0; ii <= 5; ii++) {
+    await page
+      .locator('div')
+      .filter({ hasText: `Location ${ii}` })
+      .first()
+      .waitFor();
+  }
+
+  // Let's search for a particular location
+  await page.getByRole('textbox', { name: 'nav-tree-search' }).fill('room');
+  await page.getByText('Storage Room A').first().waitFor();
+  await page.getByText('Storage Room B').first().waitFor();
 });
 
 test('Stock - Location Delete', async ({ browser }) => {