fix: broken CSS in the ParentMessageInfo component

[HoonBaek]

Changelog

• Fixed broken CSS in Thread:
  • Style was not applied to ParentMessageInfo until the first message was received on the thread list.
  • Scroll functionality was not working on the thread list.

Fix

• Use channelState, parentMessageState and threadListState to calculate the loading status in useMessageLayoutDirection
• Fix typo for className

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[HoonBaek]

#1202