Add bitcell-wallet CLI and native GUI to release workflow

[Copilot]

Release workflow only builds bitcell-node and bitcell-admin, missing the wallet binaries.

Changes

• crates/bitcell-wallet/src/main.rs — New CLI binary with create, restore, address, balance, and version commands using clap
• crates/bitcell-wallet/Cargo.toml — Add [[bin]] target and clap dependency
• crates/bitcell-wallet-gui/ — New cross-platform native GUI using Slint framework
  • Native rendering (no WebView), GPU-accelerated for 60fps smooth interactions
  • Accessibility support built-in via Slint's accessibility layer
  • Dark theme with BitCell branding
  • Views: Welcome, Create Wallet, Restore, Dashboard, Send, Receive, History
• .github/workflows/release.yml — Build and package bitcell-wallet and bitcell-wallet-gui for all platforms (Linux, macOS x86/ARM, Windows)

CLI Usage

$ bitcell-wallet create --name "My Wallet"
$ bitcell-wallet restore --mnemonic "word1 word2 ..."
$ bitcell-wallet address --chain bitcell
$ bitcell-wallet version

GUI Features

• Cross-platform: macOS, Linux, Windows

• Native rendering with 60fps animations

• Wallet creation with mnemonic backup

• Multi-chain address management (BitCell, Bitcoin, Ethereum)

• Transaction sending and history views

• Fixes Fix the build action #19

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Fix the build action</issue_title>
<issue_description>Build step should build the wallet as well, currently just node and admin are in the workflow.

This must be fixed</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Fix the build action #19

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Copilot]

Copilot wasn't able to review any files in this pull request.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Steake]

@copilot Implement the Wallet’s cross-platform native GUI using Slint. Targeting macOS, Linux and Windows. Avoid WebViews; ensure accessibility and smooth 60 fps interaction.

[Copilot]

@copilot Implement the Wallet’s cross-platform native GUI using Slint. Targeting macOS, Linux and Windows. Avoid WebViews; ensure accessibility and smooth 60 fps interaction.

Implemented in 5ea92ea. Added bitcell-wallet-gui crate with cross-platform native GUI using Slint:

• Native rendering - No WebView, uses GPU-accelerated Slint renderer
• 60fps animations - Smooth transitions throughout the UI
• Accessibility - Built-in support via Slint's accessibility layer
• Dark theme - BitCell branded color scheme
• Views: Welcome, Create Wallet, Restore, Dashboard, Send, Receive, History

The release workflow now builds bitcell-wallet-gui for all platforms (Linux, macOS x86/ARM, Windows).