Added Coconut Wallet (watch-only Bitcoin wallet by Nonce Lab)

[maxbitcoiner]

Summary

Adds Coconut Wallet, a watch-only
Bitcoin wallet for iOS and Android by Nonce Lab
(Seoul, South Korea). Source code.
The wallet pairs with offline signers — Coconut Vault, Keystone 3 Pro,
SeedSigner, Jade, Coldcard (Mk4 / Q) and Krux — over animated QR codes
(BC-UR 2.0 / BBQr) for fully air-gapped PSBT signing.

Files added

• brands/coconut.json — Coconut brand entry
• item-types/software-wallets/items/coconut-wallet.json — full feature mapping (161 features)
• item-types/software-wallets/img/coconut-wallet.webp — 500×500 logo
• item-types/software-wallets/img/coconut-wallet-thumb.webp — 150×150 thumbnail
• item-types/software-wallets/img/coconut-wallet-social.png — 500×500 social card
  Logo source: official iOS app icon (ios/Runner/Assets.xcassets/AppIcon.appiconset/1024.png)
  in the upstream repo, downscaled to the required dimensions.

Highlighted capabilities

• Watch-only architecture — private keys live on a paired offline signer
• Multisig (P2WSH) with BIP-129 BSMS descriptor normalisation
• Animated QR signing via BC-UR 2.0 and BBQr
• Replace-By-Fee and Child-Pays-For-Parent fee bumping
• Manual coin control with per-transaction memos and UTXO tagging
• Custom Electrum server (Fulcrum included as a default), biometric unlock with shuffled keypad
• Available on App Store and Google Play (mainnet + dedicated Regtest builds)

Validation

cd scripts && node json-validation.js passes locally — schema matches the existing
software-wallet entries (29 categories, 161 features, identical to the Sparrow entry).
All external links (App Store, Play Store, GitHub, Discord, etc.) verified with HTTP 200
plus content checks.

[maxbitcoiner]

Hi @maxitbh I've added a new wallet (Coconut Wallet) to the database. Could you review and merge when you get a chance? Thanks!