[Feature request] Import custom derivation paths to wallets on the device

[openoms]

What happens with a wallet using multiple derivation paths: Import:

• import seed (+ passphrase) to SpecterDIY
• select Master Public keys
• select Enter custom derivation
• Scan the master public key to a SpecterDesktop device
• create wallets one-by-one in SpecterDesktop, see: https://github.com/cryptoadvance/specter-desktop/issues/369

Sign:

• Scan wallet Master Public Key from SpecterDesktop with SpecterDIY
• create unsigned PSBT with SpecterDesktop
• scan with SpecterDIY
• sign and scan with SpecterDesktop

Request: A button to add the wallet Master Public Key to the Wallets on SpecterDIY when the custom derivation path is shown. This way the step to import the wallet before signing would become unnecessary and could just proceed to scanning and signing the unsigned PSBT created on SpecterDesktop.

[openoms]

~With the Firmware 1.5.4 can't find the way to add wallets on the device any more.~

Could be related: https://github.com/cryptoadvance/specter-diy/issues/122

Edit: Scanning the QRcode from SpecterDesktop works when the wallet was exported by the DIY device itself.

As discussed on TG with Stepan: In Specter-Desktop go to wallet - Settings - Export - Show diy QR code you could also craft a QR code yourself, the content should be

addwallet name&sh(wpkh([fingerprint/derivation]xpub))

Still would be great to be able to add wallets straight form the menu of the device.