Features added:
- Created stdin API route for sending input to process stdin
- Added useSendProcessStdin React Query hook
- Created StdinInput modal component with:
- Multi-line textarea for input
- Ctrl+Enter keyboard shortcut
- Optional newline append
- Character count display
- Info banner explaining stdin functionality
- Added stdin button to ProcessCard (Terminal icon)
- Button only enabled when process is running (state === 20)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
