YonatanAvhar

Because it's a Chat with a bot, what functionality does it need that a web app can't provide?

If a device isn't yours, wouldn't it be the device owner's responsibility to maintain their own privacy?

I just have one question

Why?

I've never heard of it either, but I came to the same conclusion as you

I don't know if this applies to all phones, but my Android phone can act as hotspot while connected to a regular AP, and it does NAT so it appears as one device

Run a WireGuard VPN on your server and only forward its port (only UDP is needed) to your server.

I've seen many projects do it, Ubuntu, KDE Applications (not Plasma itself), and Helix are the first ones that come to mind

There are a ton of typos in this post, missing semicolons, "you" instead of "your", "then" instead of "than"... that's just the first sentence

I don't know what software you plan on using to create media, but the Duet 3i isn't a powerful machine, and it may struggle to do media creation

Either way, a solid distro for pretty much any hardware and experience level is Mint XFCE

Connect a mouse to it and draw your pattern with it

Should be possible, my main concern would be the battery, you'd need to root the device and have some form of battery charge control to make sure it doesn't explode due to being charged to 100% for too long.

As for actually configuring it, Android can do Ethernet tethering if provided with a USB-C to Ethernet dongle, and you can set that up as the WAN of your router, or use it instead of your router and simply use a switch.

Seems like a simple fix, just manually set the DNS servers on devices that connect to your hotspot