Feature request: Cross-machine session sync/sharing

Problem

When developing across multiple machines (e.g., Mac Mini and MacBook Air), Claude Code sessions cannot be carried over because they are stored locally.

Current Limitations

• --continue / --resume only work within the same machine
• Remote Control is a workaround, but doesn't work when offline or when the other machine is asleep
• Syncing the session directory via iCloud/Dropbox is unofficial and risks file conflicts

Proposed Solution

One or more of the following:

• Cloud sync for session data — optionally sync sessions via Anthropic account so they're accessible from any machine
• Session export/import — CLI commands to export a session to a file and import it on another machine (e.g., claude --export-session <id> / claude --import-session <file>)

Use Case

Many developers work from multiple machines (desktop at home, laptop on the go). Being able to pick up exactly where you left off on a different machine would significantly improve the workflow.