xPub & µSD

I am trying to use 32F469IDISCOVERY as a standalone signing device. No QR code reader, just the µSD.

Here is what seems to be currently lacking and since it seems to be low hanging fruit I list it here :

- when in "Master public keys" menu I am opening "Single key" or "Multisig" - I would like to be able to save to µSD
- can "Scan QR code" button be hidden if no QR code scanner is attached ?
- import xPub from "SD card" menu
- what is the format of the private key backup on the µSD ? it load back in Specter-DIY, but I would prefer a 24 words backup in a text file
- there is currently no way to add a wallet other than via QR code scanner. I would appreciate being able to import xpub from µSD to be able to derive keys of other xpubs (watch only wallet) and xpub & config for multisig wallets
- when in "Master public keys" menu I am opening "Single key" or "Multisig" and after "Change account number" It would be useful to add the account to "Wallets" menu so that addresses can be generated, listed and saved to µSD directly from an off-line DIY
- In the "Wallets" menu it would be useful to be able to export all or specific wallet addresses (with a specified number of addresses, external only or optionally also change) to µSD
- currently if I change the account from 0 to something different add the xPub to Specter-Desktop and create a PSBT the DIY will say "Unknown wallet in inputs". the two points listed above would solve this
- last point - a signed transaction could be shown as QR code in addition to be written to µSD. it would be even faster to import to Specter-Desktop.