Add a SeedSigner case study

[GBKS]

@easyuxd put together material for a case study for his design work on SeedSigner. Check it out here.

Shall we add it to the guide? It's really well done, a true open-source project, and we don't have much about hardware wallets in general.

I'm happy to post the files over, just want to create this issue and get some input, and maybe reviews on the content before doing so. What do you think?

[easyuxd]

Thanks, @GBKS!

The SeedSigner team worked hard on the redesign and collaborated on this case study. We're grateful to be considered, and hope to have it added to the website as a useful resource for other designers and teams. 🙏

[harsh-it53]

Hey @GBKS and @easyuxd ,

I definitely think we should add this to the Guide. Christoph, you are spot on that we currently have a gap regarding hardware and air-gapped patterns. Most of our existing case studies lean heavily toward mobile/desktop software coordinators, so having a dedicated hardware breakdown is highly valuable.

I just read through the repository, and the content is incredibly well put together. The breakdown of the stateless mental model (Keys > Signing Device > Software Coordinator) is super clear. Furthermore, seeing how the design handles extreme physical constraints, like navigating complex PSBT flows on a 1.3-inch screen with just a joystick, and using the SeedQR innovation for seed injection, provides fantastic reference material for the community.

I'm fully in favor of posting the files over. I'd be more than happy to help review the Markdown formatting or check how the layouts and assets render once the porting begins!