### What problem does this PR solve?
fix: if the conversation name is too long, it will overflow the current
item. #607
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
* feat: add loading to all pages
* fix: disable sending messages if both application and conversation are empty
* feat: add chatSpin class to Spin of chat
* feat: fixed the issue where ChatConfigurationModal displays old data when creating a new dialog
* feat: Add Skeleton to MessageItem before the backend returns a message