The current reactivity model for Neo.grid.Row using record_ and rowIndex_ reactive configs has proven brittle and prone to race conditions, update loops, and stale data (e.g., columns disappearing after scrolling).

Proposed Architecture:

1. Remove Reactivity: Convert record_ and rowIndex_ to standard non-reactive configs in Neo.grid.Row.
2. Explicit Update Method: Introduce updateContent({record, rowIndex}) in Neo.grid.Row.
   • This method will synchronously update the instance properties.
   • It will then explicitly trigger createVdom().
3. Refactor GridBody:
   • Update createViewData to call row.updateContent() directly for every row in the view window.
   • Remove the force parameter logic as updateContent will always force a VDOM generation.
   • This simplifies the update logic and ensures determinism.

Tasks:

1. Refactor src/grid/Row.mjs:
   • Change record_ to record.
   • Change rowIndex_ to rowIndex.
   • Remove afterSetRecord.
   • Implement updateContent(data).
2. Refactor src/grid/Body.mjs:
   • Update createViewData to use item.updateContent({record, rowIndex}).
   • Remove force parameter usage.