Skip local subfolders option in Auto-Upload

**First I want to thank you all for the contributions you make!**

**Is your feature request related to a problem? Please describe.**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
* When using auto-uploads for pictures (or videos), subfolders are always included in the selected directory.
This is a problems as my Android mobile stores local pictures in `/DCIM/`, `/DCIM/Camera/`, `/DCIM/ScreenRecorder`, `/DCIM/Snapchat` etc.
I would love to be abe to upload the pictures from `/DCIM/` and then select subfolders individually.
* I have been having problems where this (I think this is the reason) uploads duplicates on my nextcloud server.

**Describe the solution you'd like**
A clear and concise description of what you want to happen.
* An option in auto-upload settings "Do not upload content from subfolders"

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.
* Another alternative option would be to skip any subfolders to be created in the remote folder when "use subfolders: year/month" option is selected.

**Additional context**
Add any other context or screenshots about the feature request here.
* My auto-upload setting are:
* Always select same remove folders (i.e `my pictures` for all pictures and `my videos` for all videos)
* select "use subfolders: year/month"
* select "Skip uploading" on the "What to do if the file already exists?"
* The result I see in my nextcloud is: `/my pictures/2026/7/`, `/my pictures/2026/7/Camera`, `/my pictures/2026/7/Screenshots`, `/my pictures/2026/7/Snapchat`
* In this example, I would prefer all of those to go to the remote folder: `/my pictures/2026/7/` and make use of the feature: "Skip uploading" on the "What to do i fthe file already exists?".

* Nextcloud Android app version 34.1.0
* Nextcloud Server is version 34.0.1 (on my way to upgrade to 34.0.2)
* Mobile on Android 16 security patch 2026-06-01
* These subfolders in the remote directory have been bothering me for a year or two, so nothing new.

Again thank you all and have a nice day!

Start in the Android app's auto-upload settings and trace how the selected directory, subfolders, "use subfolders: year/month," and "Skip uploading" are handled. Done means an option can exclude local subfolders while preserving the requested remote folder behavior, with the result verified against the described DCIM and Nextcloud paths.

Written by the indexing model from the issue text.