openai/gpt-5.2-chat → A (20:1)

Side A introduces an entire URL canonicalization subsystem (graph.rs, graph_builder.rs, parse.rs) with DFA-based traversal, host normalization, tracking-parameter stripping, generic fallback logic, and extensive unit and end-to-end tests. Side B merely removes a small HTML preview section (`vote-compare-preview-wrap`) from a template without adding new functionality. The architectural addition and comprehensive test coverage in A provide far greater lasting value.