If you can't see any buttons etc. either, this is because you have WebGL disabled. I use Cromite to access canvas on mobile, with WebGL specifically enabled for the canvas website.
Rechts von Gandalf verewigt sich derzeit sogar auch noch die Nudel
One drawback of the steamdeck is its size and weight though, it's significantly bulkier than a switch. Still well worth the tradeoff though imo.
The reason Signal does this is that they consider your deivce storage 'unsafe', as it can be more easily accessible by other apps. AFAIK not providing the option to let you do it anyway is purely because the Signal devs don't want to.
Threema for example has an option to save all received media to normal storage, similar to WhatsApp.
The Pixel 8 and onwards technically support DP alt mode again. I'm not sure about stock, but I believe I read about some people having it just work in Graphene OS.
Slightly old post, but hopefully still helpful to someone:
I managed to read out my analog water meter using the following ESP32 image: https://github.com/jomjol/AI-on-the-edge-device
It uses an ESP32-CAM module that actively reads your meter, using machine vision. The data is then published via MQTT. There are even some stl files for cases/mounts for common energy meters.
Once setup properly (with a 3D printed case from the provided stl files), I found it to work quite well. I have a pretty clean standard German water meter though.
I'd assume it won't, you can always just test it out though. There might be some setting for those timeouts in the Steam-steamdeck settings.
I haven't done this myself, but I assume you can turn off the display in Desktop Mode. I assume somewhere in the "normal" Linux settings there will be the usual Turn Screen Off after ... and Go To Sleep after ... You could just set the screen to turn off after 5 mins, then set sleep to never and that should do it.
I've been team Bluetooth off while not in use since my first smartphone. Now that I run GrapheneOS there's even a super handy Bluetooth setting to turn it off automatically if there hasn't been a device connected for the last 30s.
Vielleicht benutzen die dann doch lieber die Klimaanlage
+1 on the mobile draggging issue