Adds Version Channel section to Settings sidebar allowing users to:
- See current branch (main or beta/7.0) and stability status
- Switch to beta branch to access Endless Mode features
- Switch back to stable for production use
- Pull updates for current branch
Implementation:
- BranchManager.ts: Git operations for branch detection/switching
- worker-service.ts: /api/branch/* endpoints (status, switch, update)
- Sidebar.tsx: Version Channel UI with branch state and handlers
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Co-Authored-By: Claude <noreply@anthropic.com>
Alex Newman