### Environment- Zotero version: 9.0.6 (ARM64)
- Operating system: macOS 26.5.2
- Profile: default- This bug is reproducible without any extensions enabled (in safe mode)

### Description
Two built-in context menu items in `zotero-itemmenu` are rendered as **empty entries** (blank rows) in the right-click context menu.
Both items have empty `` elements with no visible text content.

Affected menu items (defined in `chrome/content/zotero/zoteroPane.xhtml`):

1. **`zotero-menuitem-create-note-from-annotations`** — should appear when right-clicking attachments with annotations, but renders
as a blank row.
2. **`zotero-menuitem-duplicate-and-convert`** — should appear when right-clicking a `book` or `bookSection` item; the corresponding
`oncommand` handler `duplicateAndConvertSelectedItem` throws an error when invoked on other item types.

Both `` elements have empty `` children (no `label` attribute and no
`data-l10n-id` attribute pointing to localization strings).

### Steps to Reproduce**Step 1: Diagnose the empty entries**

Open `Tools → Developer → Run JavaScript`, paste the following, and run:

```javascript
const pane = Zotero.getActiveZoteroPane();
let items = pane.getSelectedItems();

if (!items.length) {
const all = Zotero.Items.getAll();
const nonBook = all.find(
(i) => i.itemType !== 'book' && i.itemType !== 'bookSection'
);
if (nonBook) pane.selectItem(nonBook.id);
}

const popup = document.getElementById('zotero-itemmenu');
if (!popup) return { error: 'popup not found' };

popup.dispatchEvent(
new Event('popupshowing', { bubbles: false, cancelable: true })
);

const dump = [];
for (let i = 0; i < popup.children.length; i++) {
const el = popup.children[i];
dump.push({
idx: i,
tag: el.tagName,
id: el.id || '',
label: el.getAttribute('label') || '',
cls: (el.getAttribute('class') || '').slice(0, 60),
hidden: el.hidden,
});
}

const empties = dump.filter(
(s) => s.tag === 'menuitem' && !s.label.trim()
);
return {
selectedItemTypes: items.map((i) => i.itemType),
popupChildrenCount: dump.length,
emptyItemsCount: empties.length,
empties: empties,
emptyOuterHTML: empties.map((e) => popup.children[e.idx].outerHTML),
};

Observed output (when an attachment is selected):

{
"selectedItemTypes": ["attachment"],
"popupChildrenCount": 48,
"emptyItemsCount": 2,
"empties": [
{
"idx": 8,
"tag": "menuitem",
"id": "",
"label": "",
"cls": "menuitem-iconic zotero-menuitem-create-note-from-annotations",
"hidden": false
},
{
"idx": 17,
"tag": "menuitem",
"id": "",
"label": "",
"cls": "menuitem-iconic zotero-menuitem-duplicate-and-convert",
"hidden": true
}
],
"emptyOuterHTML": [
"",
""
]
}

Step 2: Visual confirmation

1. Right-click any item in your library that is an attachment (or contains attachments).
2. Observe a blank row appearing in the context menu.
3. Click the blank row — depending on the item type, you may see the following error in the Browser Console (Tools → Developer →
JavaScript Console):

Uncaught (in promise) Error: duplicateAndConvertSelectedItem requires a single book or bookSection to be selected
duplicateAndConvertSelectedItem chrome://zotero/content/zoteroPane.js:2153
oncommand chrome://zotero/content/zoteroPane.xhtml:1

Expected BehaviorThe two menu items should display their proper labels (e.g., "Create Note from Annotations", "Duplicate and Convert
Item"), or be hidden (hidden="true") when not applicable to the selected item type.

Actual Behavior

Both menu items appear as empty rows. Their elements contain no text content and have no label attribute or data-l10n-id
attribute to provide one.

Likely Cause

The two elements in zoteroPane.xhtml are missing either:
- A label attribute, or
- A data-l10n-id attribute referencing the appropriate localization key in chrome/locale/en-US/zotero/zotero.ftl.

This appears to be a regression introduced in Zotero 9.0.6 when the two new context-menu features were added (related to PR #2799
for duplicateAndConvertSelectedItem).

Suggested Fix

Add the missing data-l10n-id (or label) attributes to both elements in chrome/content/zotero/zoteroPane.xhtml, e.g.:




…and add the corresponding localization keys in chrome/locale/en-US/zotero/zotero.ftl.

Workaround

Until the bug is fixed, the empty entries can be hidden by running the following code once per Zotero session via Tools → Developer
→ Run JavaScript:

const ids = [
'zotero-menuitem-create-note-from-annotations',
'zotero-menuitem-duplicate-and-convert',
];
ids.forEach((id) => {
const el = document.getElementById(id);
if (el) el.hidden = true;
});
return 'Empty menu items hidden';

Related

- PR #2799 (duplicateAndConvertSelectedItem: Don't copy abstracts) — introduced the duplicateAndConvertSelectedItem feature.
- Browser Console error stack: chrome://zotero/content/zoteroPane.js:2153 and chrome://zotero/content/zoteroPane.xhtml:1.