feat: Add unlock button and lock status indicator to jog panel

This commit adds two complementary features to improve GRBL alarm state management:

1. Unlock Button (🔓)
   - Added to jog controls panel below Home button
   - Sends $X command to clear GRBL alarm states
   - One-click unlock instead of typing in console
   - Shows 'Unlocking alarm...' status message
   - Logs to console and tracing system

2. Lock Status Indicator (🔒/🔓)
   - Visual indicator in jog panel header
   - Shows red '🔒 LOCKED' when machine in alarm state
   - Shows green '🔓 READY' when machine operational
   - Displays current machine status (Idle, Run, Alarm, etc.)
   - Updates in real-time as machine state changes
   - Color-coded for quick recognition
   - Accessible with icons, text, and color

User Workflow Improvements:
- Immediate visual feedback about machine state
- Clear indication when unlock is needed
- Guided workflow: See locked → Click unlock → See ready
- Reduces confusion about why commands don't work

Technical Details:
- Added MachineStatus import to app.rs
- Added send_unlock_command() method
- Added status indicator UI with color-coded labels
- Uses existing state system (no new dependencies)
- ~44 lines of code added to src/ui/app.rs

Testing:
- ✅ Compiles cleanly
- ✅ All 133 unit tests passing
- ✅ No new warnings
- ✅ Ready for hardware testing

Documentation:
- UNLOCK_FEATURE.md: Unlock button documentation (9KB)
- LOCK_STATUS_INDICATOR.md: Status indicator docs (12KB)
- GITHUB_RELEASE_SUMMARY.md: Release information
- RELEASE_NOTES_v0.1.0-alpha.md: Alpha release notes

Impact: Significantly improves user experience for common GRBL alarm
state management, especially helpful for users unfamiliar with $X command.

Author: Tim Hawkins

GITHUB_RELEASE_SUMMARY.md

@@ -0,0 +1,310 @@
+# GitHub Release Created Successfully
+
+**Date**: January 5, 2025  
+**Release**: v0.1.0-alpha  
+**Status**: ✅ Published as Pre-release
+
+---
+
+## Release Details
+
+### Basic Information
+
+- **Title**: rCandle v0.1.0-alpha - First Alpha Release
+- **Tag**: v0.1.0-alpha
+- **Commit**: 64b4e91
+- **Type**: Pre-release (Alpha)
+- **Target Branch**: master
+- **Published By**: thawkins
+- **Release URL**: https://github.com/thawkins/rCandle/releases/tag/v0.1.0-alpha
+
+### Release Content
+
+The release includes:
+- ✅ Complete release notes from `RELEASE_NOTES_v0.1.0-alpha.md`
+- ✅ Marked as pre-release (appropriate for alpha status)
+- ✅ Full changelog and documentation
+- ✅ Installation instructions
+- ✅ Known limitations
+- ✅ Troubleshooting guide
+
+### What Users Get
+
+When users visit the release page, they see:
+
+1. **Overview**
+   - First alpha release announcement
+   - Major milestone: fully functional hardware communication
+   - Core CNC control features ready
+
+2. **Features**
+   - Hardware communication details
+   - G-Code management capabilities
+   - 3D visualization features
+   - Machine control options
+   - UI features
+   - Advanced capabilities
+
+3. **Critical Fixes**
+   - Tokio runtime integration
+   - Connection manager persistence
+   - Enhanced debug logging
+
+4. **Verification Status**
+   - 133 unit tests passing
+   - Hardware tested (laser engraver)
+   - Commands verified working
+
+5. **Installation Instructions**
+   - Linux, Windows, macOS steps
+   - Prerequisites
+   - Build commands
+   - Quick start guide
+
+6. **Known Limitations**
+   - Response display not in UI
+   - Limited error feedback
+   - Platform testing status
+
+7. **Documentation Links**
+   - User guides
+   - Developer documentation
+   - Troubleshooting resources
+
+8. **Next Steps**
+   - Planned v0.2.0 features
+   - Future v0.3.0 enhancements
+   - Contribution guidelines
+
+## How to Access
+
+### For Users
+
+**Direct Link**:
+https://github.com/thawkins/rCandle/releases/tag/v0.1.0-alpha
+
+**Via Repository**:
+1. Go to https://github.com/thawkins/rCandle
+2. Click "Releases" on the right sidebar
+3. Select "v0.1.0-alpha"
+
+**Via Git**:
+```bash
+git clone https://github.com/thawkins/rCandle.git
+cd rCandle
+git checkout v0.1.0-alpha
+```
+
+### For Developers
+
+**Clone Specific Release**:
+```bash
+git clone --branch v0.1.0-alpha https://github.com/thawkins/rCandle.git
+```
+
+**View Release with GitHub CLI**:
+```bash
+gh release view v0.1.0-alpha --repo thawkins/rCandle
+```
+
+**Download Release Assets** (when added):
+```bash
+gh release download v0.1.0-alpha --repo thawkins/rCandle
+```
+
+## Release Features
+
+### Pre-release Status
+
+The release is marked as "Pre-release" which means:
+- ✅ Appears in release list with "Pre-release" badge
+- ✅ Not marked as "Latest" release
+- ✅ Users understand this is alpha/testing stage
+- ✅ Appropriate for community testing
+- ✅ Can be promoted to full release later if desired
+
+### Visibility
+
+The release is:
+- ✅ Public (visible to all GitHub users)
+- ✅ Discoverable via GitHub search
+- ✅ Listed on repository releases page
+- ✅ Included in repository tags
+- ✅ Accessible via GitHub API
+
+### GitHub Features Available
+
+Users can:
+- 📖 Read full release notes
+- 💬 Comment on the release
+- 📥 Download source code (zip/tar.gz automatically provided)
+- 🔗 Share direct link to release
+- 📊 See commit history to this release
+- 🏷️ Browse all repository tags
+
+## Statistics
+
+### Release Content Size
+
+- **Release Notes**: 10,935 bytes (~11 KB)
+- **Full Documentation**: 88 KB user docs + 216 KB specs
+- **Source Code**: ~12,249 lines of Rust
+- **Test Coverage**: 133 unit tests
+
+### GitHub Metrics
+
+- **Commits to Release**: 12 commits
+- **Files Changed**: 9 files in final commit
+- **Insertions**: 2,044 lines
+- **Deletions**: 8 lines
+
+## Promotion and Sharing
+
+### Share URLs
+
+**Release Page**:
+```
+https://github.com/thawkins/rCandle/releases/tag/v0.1.0-alpha
+```
+
+**Repository**:
+```
+https://github.com/thawkins/rCandle
+```
+
+**Direct Download** (GitHub auto-generates):
+- Source code (zip): https://github.com/thawkins/rCandle/archive/refs/tags/v0.1.0-alpha.zip
+- Source code (tar.gz): https://github.com/thawkins/rCandle/archive/refs/tags/v0.1.0-alpha.tar.gz
+
+### Social Media Template
+
+```
+🎉 rCandle v0.1.0-alpha is here!
+
+First alpha release of this Rust GRBL controller with:
+✅ Hardware communication working
+✅ Home & jog commands verified
+✅ 3D toolpath visualization
+✅ Comprehensive documentation
+
+Tested with real hardware. Ready for community testing!
+
+https://github.com/thawkins/rCandle/releases/tag/v0.1.0-alpha
+
+#rust #cnc #grbl #opensource
+```
+
+## Next Steps
+
+### Optional Enhancements
+
+1. **Add Binary Releases**
+   - Build for Linux, Windows, macOS
+   - Upload as release assets
+   - Provide checksums
+
+2. **Add Screenshots**
+   - Main window
+   - 3D visualization
+   - Connection dialog
+   - Settings panel
+
+3. **Create Demo Video**
+   - Quick start guide
+   - Hardware connection demo
+   - Command execution
+   - Upload to release or README
+
+4. **Update README Badge**
+   ```markdown
+   ![Release](https://img.shields.io/github/v/release/thawkins/rCandle?include_prereleases)
+   ```
+
+5. **Announce Release**
+   - Reddit r/rust
+   - Rust forum
+   - CNC forums
+   - Twitter/social media
+
+### Monitoring
+
+Track release metrics:
+- Views/visits to release page
+- Download counts
+- Issues reported
+- Community feedback
+- Stars/forks gained
+
+Use GitHub Insights to monitor:
+```bash
+gh api repos/thawkins/rCandle/releases/latest
+```
+
+## Maintenance
+
+### Future Releases
+
+When creating v0.2.0:
+1. Create new tag: `git tag -a v0.2.0 -m "..."`
+2. Push tag: `git push origin v0.2.0`
+3. Create release: `gh release create v0.2.0 --notes-file ...`
+4. Mark as full release (not pre-release)
+
+### Editing Release
+
+To update release notes:
+```bash
+gh release edit v0.1.0-alpha --notes-file UPDATED_NOTES.md
+```
+
+To add assets:
+```bash
+gh release upload v0.1.0-alpha path/to/binary
+```
+
+### Deleting Release (if needed)
+
+```bash
+gh release delete v0.1.0-alpha
+git push --delete origin v0.1.0-alpha  # Also delete tag
+```
+
+## Verification Checklist
+
+- [x] Release created on GitHub
+- [x] Tag pushed to remote
+- [x] Release notes included
+- [x] Marked as pre-release
+- [x] Source code automatically attached
+- [x] Release visible in GitHub UI
+- [x] Direct URL accessible
+- [x] Installation instructions provided
+- [x] Documentation linked
+- [x] Known limitations documented
+- [x] License information included
+
+## Success Criteria Met
+
+✅ **Visibility**: Release is public and discoverable  
+✅ **Documentation**: Complete release notes provided  
+✅ **Accessibility**: Multiple download methods available  
+✅ **Status**: Correctly marked as pre-release/alpha  
+✅ **Information**: Users have all needed info to use the software  
+✅ **Promotion**: Ready to share with community
+
+## Summary
+
+The v0.1.0-alpha GitHub release has been successfully created and is now live at:
+
+**https://github.com/thawkins/rCandle/releases/tag/v0.1.0-alpha**
+
+The release includes comprehensive documentation, installation instructions, known limitations, and next steps. It's properly marked as a pre-release, indicating alpha status, and provides users with everything they need to test and use rCandle.
+
+The project is now officially released and ready for community testing and feedback!
+
+---
+
+**Created**: January 5, 2025  
+**Tool Used**: GitHub CLI (gh)  
+**Command**: `gh release create v0.1.0-alpha --title "..." --notes-file ... --prerelease`  
+**Status**: ✅ Success