Support scanning SeedQR recovery phrases

[dmnyc]

Blockstream Wallet's QR scanner only reads a recovery phrase as plain text words. It doesn't recognize SeedQR, the standard format for encoding a recovery phrase as a QR code, which Jade itself can already create and scan.

Scanning one on the restore screen currently does nothing at all. No error, no message, so it just looks broken.

Could Blockstream Wallet accept SeedQR (ideally CompactSeedQR too)? And in the meantime, show a message for unrecognized QR codes instead of ignoring them.

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_{Filed by my AI agent on my behalf.}

[dmnyc]

Also filed for iOS, which is where this was first noticed: Blockstream/green_ios#98

[ardier16]

@dmnyc thanks for the suggestion and for linking the iOS report! The app currently accepts recovery phrases encoded as plain text, but not SeedQR or CompactSeedQR. Supporting the formats already used by Jade would improve interoperability, and unsupported QR codes should show clear feedback instead of being silently ignored. We’ll keep this open as a feature request.