Bug: Missing 'New Draw.io File' option in Favorites/Personal Files view since NC29 update

[Ver-Nunft]

Problem Description

The option to create new Draw.io files (diagram/whiteboard) via "+ New" is missing in:

• Favorites view (regression since NC29.0.16 + Draw.io 26.2.15) - e.g. ".../apps/files/favorites?dir=/subdir_1/subdir_2"
• Personal Files view (pre-existing limitation, feature request) - e.g. ".../apps/files/personal?dir=/"
  Affected Versions:
• Nextcloud 29.0.16
• Draw.io App 26.2.15

Reproduction Steps

1. Navigate to "Favorites" view in Nextcloud
2. Click "+ New" button
3. Expected menu: "New Draw.io Diagram"/"New Draw.io Whiteboard"
4. Actual result: Missing Draw.io creation options

Expected Behavior

Consistent availability of Draw.io file creation across all file views, matching previous functionality (NC29.0.10 + Draw.io 26.2.13).
It did work for Favorites view once, but not Personal Files view

User Impact:
Blocks quick diagram creation in frequently used workspaces. Screenshot comparison available upon request showing functional vs. broken states.

[arnowelzel]

Works fine for me (see screenshots). Nextcloud 31.0.7 (with custom CSS to remove rounded corners around the main area). Maybe this only affects Nextcloud 29.0.16? But then it seems to be a problem with Nextcloud as well not only Draw.io.