v0.1.49

Project synchronization recovery

• Preserve local project files and conversation history when an upload fails.
• Recover the same linked project and conversation after reopening, and retry
  pending synchronization.
• Stop repeatedly requesting a project name when the project is already linked
  but its upload is still pending.
• Show pending, synchronized and conflict states explicitly, with safeguards
  against duplicate projects and overwriting newer remote state.

Update with aius update 0.1.49, then restart from the original project folder.
Use aius --continue to resume the conversation. Keep the original folder and
its local state; there is no need to recreate the project.

This update cannot restore files or history already deleted before upgrading.
Local-only datasets continue to follow the existing synchronization policy.