v0.3.0

- **Fabric Network Wizard**: Step-by-step guided flow for creating Fabric networks with organizations, nodes, and channels
- **Quick Start Wizard**: End-to-end onboarding wizard for spinning up a blockchain network in minutes
- **Block Height Display**: Real-time block height shown on Besu and Fabric network node cards
- **Onboarding Improvements**: Empty state CTAs, success dialog, and login hints for better first-run experience

- **Launchd Services**: Use ProgramArguments array instead of bash -c wrapper, fixing binary paths with spaces on macOS