openai/gpt-chat-latest → A (50:1)

Side A introduces a substantial new URL canonicalization subsystem: parser, semantic graph with validated builder, traversal logic, canonical URL and breadcrumb generation, generic fallback behavior, and extensive unit/end-to-end tests covering Reddit, YouTube, aliases, query normalization, and regressions. Side B only removes a small HTML preview section from the vote comparison page, deleting a UI block without adding comparable infrastructure or functionality.