Improve Hacker News comment structure clarity with labels

[brianlovin]

Summary

Enhanced the comment formatting in the story context builder to make the hierarchical structure of Hacker News discussions more explicit and easier to follow. Added clear labels and a guide to help users understand the comment nesting and relationships.

Key Changes

• Added a "Comment Structure Guide" section that explains how to interpret the comment hierarchy
• Implemented comment labeling system:
  • Root-level comments are now marked with [ROOT COMMENT #N] tags and numbered sequentially
  • Nested replies are marked with [Reply to username] tags to show parent relationships
  • Indentation continues to visually represent nesting depth
• Updated formatCommentsForContext() function signature to track:
  • parentUser: The username of the parent comment for nested replies
  • rootCommentIndex: A counter object to track and number root comments across the entire tree
• Improved readability by passing parent user information through recursive calls

Implementation Details

• Used an object { value: number } for rootCommentIndex to maintain state across recursive calls (JavaScript pass-by-reference)
• Root comments are identified by depth === 0 condition
• Parent user information is passed down the recursion chain to label replies appropriately
• The guide text is added once before processing all comments, providing context for the entire discussion section