Implemented automation clipboard system:
- Added separate automationClipboard state for automation points
- Created handleCopyAutomation function to copy automation lane points
- Created handlePasteAutomation function to paste at current time with time offset
- Added Copy and Clipboard icon buttons to AutomationHeader component
- Automation points preserve curve type and value when copied/pasted
- Points are sorted by time after pasting
- Toast notifications for user feedback
- Ready for integration when automation lanes are actively used
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Co-Authored-By: Claude <noreply@anthropic.com>