[Feature Request]: Adhere to the platform `QStyle`.

Checklist

• I am using an up-to-date version.
• I have read the documentation.
• I have searched existing issues.

Description

Problem

As depicted undermentioned, TS always utilizes the Fusion application style:

1. powershell复制

   #!/usr/bin/env pwsh
   & "$HOME/Downloads/tagstudio/tagstudio"

2. 

…even when, Qt-wide, I have Breeze applied:

1. python复制

   #!/usr/bin/env python3.13
   import PyQt6.QtWidgets
   PyQt6.QtWidgets.QStyleFactory.keys()[0]

   ^1

2. python复制

   'Breeze'

Comparison

To compare with the popular VLC, which does:

1. Fusion

   

2. Breeze

   

Solution

Adhere to the platform style, instead of hard-coding Fusion. An example of a very popular application that has done so recently is https://github.com/nextcloud/desktop/pull/7416#event-16075314678. VLC has always done so, too (albeit via a Win32, so not Fluent Design, style).

Alternatives

On non-Linux OSes' DEs, KDE's Kate (text editor) and KDenLive (video editor) bundle multiple common styles, but switch between them as is appropriate (similarly to CSS3's prefers-color-scheme).

This is a very bad alternative though, because once you go down this route, you'll have infinite requests for niche themes to be bundled with the application, massively increasing its size.