feat(12-01): add ComparisonTable component
- Side-by-side tabular comparison with all 10 attribute rows (Image, Name, Rank, Weight, Price, Status, Link, Notes, Pros, Cons)
- useMemo delta computation: blue-50 highlight on lightest weight, green-50 on cheapest price
- Gray delta string (+Xg, +$X.XX) shown below non-best cells
- Sticky left column with bg-white to prevent bleed-through on horizontal scroll
- Amber tint + trophy icon on winner column for resolved threads
- Em dash for missing weight/price data (never zero)
- Declarative ATTRIBUTE_ROWS array pattern for clean, maintainable row rendering
Jean-Luc Makiola
e442b33a59