turtle1999
5a7cb94149
- Compute each group's baseline watermark once per render. - Skip the row-motion reset when folding drops no raised watermark. - Document that the watermark is a row count that a reorder can outrun, and that any unmount of the grouped tree resets it; pin both in tests. - Cover raise-to-current, keep-after-leaving, and fold reset in the keyless Web folding scenario.