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Move grid and scrolling measurement coordination to TypeScript - #611
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Oct 7, 2026
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- TypeScript now schedules grid first-row measurements, uniform and variable virtual rows, and scroll shelf widths, then selects complete child frames through the existing allocation policies.
- Native code retains text measurement, recursive traversal, and owned continuation buffers; the previous coordinators remain independent behavior references.
- Validation covers complete trees, semantics, display lists, ordered measurement calls, wide indices, exceptional numeric words, depth failures, and buffer lifetimes: 25 compiled measurement tests, 102 typography/layout tests, and 18 packet/frontend checks pass.
- Move grid, virtual-row, and scroll measurement scheduling into compiled TypeScript. - Preserve native measurement capabilities, copied ABI ownership, and complete parity coverage.
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