[BUG] Content Drive: hide Upload button when items are selected

[zJaaal]

Problem Statement

While doing QA on Content Drive, the Upload button stays visible even when one or more items are selected in the content grid. If the user selects a folder and then uploads an asset, the asset is stored in the root folder instead of the selected one. From a user's perspective this is unintuitive: the selection implies an action context, but the upload silently ignores it and lands the asset somewhere unexpected.

The toolbar already establishes the correct pattern for this: when items are selected ($showWorkflowActions = selectedItems().length > 0), the "Add New" button is hidden and the workflow / bulk actions are swapped in. The Upload button was simply left out of that swap and is hardcoded as always-visible, so it remains clickable in a selection context where it doesn't belong.

Decision (agreed in Slack with Rafael Velazco, Melissa Rojas, and Jalinson Diaz): rather than redirecting the upload target to the selected folder — which would couple a spatial drag-and-drop gesture to a checkbox selection and introduce ambiguous UX — the Upload button should be hidden whenever there is any selection, consistent with how the "Add New" button already behaves. To upload into a specific folder, the user navigates into it (which sets the current folder) and uploads with no selection active.

Impact: Low severity, but a recurring source of confusion. Assets can end up in the wrong location with no clear indication of why.

Browser & OS: Reproducible in Chrome / macOS (browser-agnostic; pure front-end behavior).

Steps to Reproduce

1. Go to Content Drive.
2. Navigate to any folder context (e.g. site root).
3. Select a folder (or any item) in the content grid via its checkbox/row selection.
4. Note the Upload button is still visible in the toolbar.
5. Click Upload and upload an asset.
6. Observe: the asset is stored in the root/current folder, not the selected folder — and the Upload button should not have been available in this selection context in the first place.

Acceptance Criteria

• When no items are selected, the Upload button is visible and behaves as today (uploads to the current/navigated folder).
• When one or more items are selected (folders or content), the Upload button is hidden, consistent with the existing "Add New" button behavior.
• The Upload button's hide/show transition uses the same animation pattern as the "Add New" button (no visual jank when toggling selection).
• Drag-and-drop and upload-target logic are unchanged — only the Upload button's visibility is affected.
• When the selection is cleared, the Upload button reappears.
• Unit tests cover: button visible with empty selection, hidden with a single selection, and hidden with multiple selections.

dotCMS Version

Latest from main branch.

Severity

Low - Minor issue or cosmetic

Links

• Slack thread — #content-drive QA finding

[github-actions]

PRs linked to this issue

• fix(content-drive): hide Upload button when items are selected (#36369) by @zJaaal