Office on iOS Mobile App - Darkmode ist dark text on dark background

[Timschgi]

Describe the bug
If you use Nextcloud Office and open it on a iOS Mobile device via the Nextcloud App and your Nextcloud app is in Darkmode, you will not be able to see the text because its black on black

To Reproduce
Steps to reproduce the behavior:

1. Enable NC Office with a Collabora Backend
2. Open iOS Mobile App and open a xlxs dokument for example

Expected behavior
the text should invert to white automatic

Screenshots
If applicable, add screenshots to help explain your problem.

Client details:

• OS: 26.2.1
• Version 7.2.2.4
• Device: iPhone 16 Pro, iPad Pro M1

Server details

Debian 13

Apache2
MairaDB

PHP 8.4.16

Nextcloud 32

Version of the richdocuments app
9.0.2

Version of Collabora Online
Collabora Online Development Edition 25.04.8.1 278cb3481b