feat: Enhance cloud synchronization functionality, support syncing delete operations for messages and conversations, and add support for automatic sync settings

[ahzmr]

💻 变更类型 | Change Type

• [x] feat
• [ ] fix
• [ ] refactor
• [ ] perf
• [ ] style
• [ ] test
• [ ] docs
• [ ] ci
• [ ] chore
• [ ] build

🔀 变更说明 | Description of Change

What's Changed

• feat: The cloud synchronization feature is enhanced to support the synchronization of deleted conversations and deleted messages
• feat: Add automatic data synchronization settings and implementation, enabling auto-sync after completing replies or deleting conversations

📝 补充信息 | Additional Information

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Enhanced message deletion logic to track deleted messages, improving message management.
  • Added a command to copy the current chat session.
  • Introduced auto synchronization settings, allowing users to enable or disable automatic data syncing.

• Improvements

  • Updated chat session management to include tracking of deleted message identifiers.
  • Improved synchronization logic with auto-sync capabilities and timing checks.
  • Localization updates for new commands and auto sync settings in English and Chinese.