Native filepicker support via portals

[YamiYukiSenpai]

Please add support for native file picker (i.e. Dolphin for KDE) via portals so that it doesn't look so out of place?

As of right now, I can't upload when the source directory is in my Nextcloud webdav mount

[lengau]

I'm getting a portal-based file picker on my machine (Kubuntu 25.04, using Wayland) and was able to upload a file from an sftp share using it. (Using the fish protocol got me an error, but that appears to be a bug in KDE's portal implementation.)

Can you send a video of what you're seeing and some info about your system?

[YamiYukiSenpai]

Screencast_20250301_153915.mp4

Operating System: TUXEDO OS 
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.11.0-109018-tuxedo (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 62.7 GiB of RAM
Graphics Processor: AMD Radeon RX 6900 XT
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: X570S AORUS MASTER
System Version: -CF

> snap connections discord 
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audio-playback          discord:audio-playback          :audio-playback                 -
audio-record            discord:audio-record            :audio-record                   -
camera                  discord:camera                  :camera                         -
content[gnome-42-2204]  discord:gnome-42-2204           gnome-42-2204:gnome-42-2204     -
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content[icon-themes]    discord:icon-themes             gtk-common-themes:icon-themes   -
content[icon-themes]    discord:icon-themes             icon-theme-breeze:icon-themes   -
content[sound-themes]   discord:sound-themes            gtk-common-themes:sound-themes  -
desktop                 discord:desktop                 :desktop                        -
desktop-legacy          discord:desktop-legacy          :desktop-legacy                 -
gsettings               discord:gsettings               :gsettings                      -
home                    discord:home                    :home                           -
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removable-media         discord:removable-media         :removable-media                manual
screen-inhibit-control  discord:screen-inhibit-control  :screen-inhibit-control         -
shared-memory           discord:shmem                   :shared-memory                  -
system-observe          discord:system-observe          -                               -
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wayland                 discord:wayland                 :wayland                        -
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