Implements missing layout analysis capabilities:
- Add footer detection based on page position (bottom 10%)
- Build hierarchical section structure from font sizes
- Create nested list structure from indentation levels
All elements now have proper metadata for:
- section_level, parent_section, child_sections (headers)
- list_level, parent_item, children (list items)
- is_page_header, is_page_footer flags
Updates tasks.md to reflect accurate completion status.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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