Couldn't delete Timeshift snapshots from file browser

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Describe the bug
I had a really hard time trying to deleted a Timeshift snapshot that was taking way too much space.

To Reproduce
I'm not sure these steps would reproduce my problem since i've changed some stuff in the pas about Timeshift, but here we go anyway :

Set up Timeshift to make automatic snapshots
Force-stop Timeshift as it is making a snapshot (mine was ballooning and ate all the remaining space on my hard-drive which caused saving issues while i was working - see here)
Set up Timeshift so it doesn't make any automatic snapshots anymore
Delete all snapshots from the GUI
Notice some of the hard-drive space is still taken by Timeshift folders
Timeshift does not show any more saved snapshot in its GUI thus i can't delete the phantom snapshot that is taking space

What i tried to do
I tried to delete the snapshot from within Timeshift but it didn't work.
I ran Baobab and found where Timeshift was keeping the snapshots (easy, as it was using 90% of my hard-drive space) opened the folder from there (using "open with another app", which opened my default file browser Thunar) and tried to delete the files as superuser but the deleting failed several times. Sometimes, the snapshot folder wouldn't even show up.
I tried using my file browser Thunar to get to the snapshot folder i had found at /run/timeshift/snapshots/2025-09-28_19-00-01 and delete it by hand, but the folder wouldn't show up no matter what it tried. I made sure it showed hidden files and i had superuser privileges.
Finally, i decided to uninstall Timeshift and try again. I used Baobab and the same method as above, and when the folder finally showed up, ensuring again i had superuser privileges, i tried to delete. This time the process was successful.

Expected behavior
All snapshots should show up in Timeshift, and as a failsafe, users should be able to delete them from the snpashot folder in /run/timeshift/snapshots using any file browser.

Other possibly related issues

System:

Linux Distribution Name and Version: Linux Mint 22.3 - Xfce 64-bit
Desktop: [e.g. MATE, XFCE, Gnome, KDE]
Timeshift Version: 25.12.4+zena
Timeshift Mode [btrfs/rsync?]: idk
Display Server: X11

Start by reproducing the snapshot lifecycle through the Timeshift GUI, including an interrupted snapshot, then inspect /run/timeshift/snapshots/2025-09-28_19-00-01 and the related GUI behavior. Determine why the snapshot becomes invisible and cannot be removed through the file browser; done means the remaining snapshot is shown and can be deleted through a supported path.

Written by the indexing model from the issue text.

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