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The layout engine currently exposes a custom wrapper type for numeric values that are optionally undefined…

The layout engine currently exposes a custom wrapper type for numeric values that are optionally undefined…: a task in LegoFlow-SWE (Harbor dataset). We should replace this custom type with the standard Rust Option<f32 everywhere it is used in the public surface, and ensure that all layout…

The task

We should replace this custom type with the standard Rust `Option<f32>` everywhere it is used in the public surface, and ensure that all layout behaviour remains correct when constraints or computed sizes are undefined.

Part of Lego-X/LegoFlow-SWE.