* 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
* fix: only allow message send when key is provided when required
- create useRequiresKey hook
- pass same disabled prop to Textarea, AttachFile, and SendButton
- EndpointItem: add localization, stopPropagation, and remove commented code
- separate some hooks to new Input dir
- completely remove textareaHeight recoil state as is not needed
- update imports for moved hooks
- pass disabled prop to useTextarea
* feat: add localization to textarea placeholders