React Nested Comments (Infinite Replies, Single Active Reply Input)

Challenge summary

Build a React nested comments panel with infinite replies. Users can add top-level comments and reply to any comment, creating an infinitely deep tree.

What you'll practice

• Render a nested comments UI as the main screen.
• Allow adding top-level comments via a textarea + 'Add Comment' button.
• Each comment has a 'Reply' button.
• Allow infinite depth replies (nested tree).
• Render replies hierarchically with indentation.

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