* chore: identify new chat buttons with testid
* fix: avoid parsing error in useSSE, which causes errorHandler to fail
* fix: ensure last message isn't setting latestMessage when conversationId is `new` and text is the same due to possible re-renders
* refactor: set placeholder through inputRef and useEffect
* Update useSSE.ts
* Update useSSE.ts
* Correct the display of the interface when hovering with the mouse
* Replace ring-1 with border completely.
* Fix it so that the text does not overlap with the SVG in mobile navigation.
* Remove the extra class -ml-0.5 -mt-0.5, there is no need to shift the buttons
