- Add EmbedBridge.ts PostMessage bridge for Elemes iframe integration
- Add DeployProgress.tsx component for compile/transfer/flash progress UI
- Add DeployProgress.css styling for overlay progress bar
- Modify SerialMonitor.tsx to support BLE/Hardware toggle by Elemes
- Modify vite.config.ts to use VITE_BASE_PATH=/velxio/
- Modify deploy/nginx.conf to remove root redirect
- Update useSimulatorStore.ts with deployState, hwSerialOutput
- Update App.tsx for /editor route
- Add backend endpoints for Elemes auth, projects, dependencies
This commit allows Velxio to run embedded in Elemes lesson pages via iframe
with PostMessage communication for code loading, circuit state, and serial
monitoring.