Support custom attributes for composite raw values

[nathanacurtis]

Problem

Complex composite properties — effects (shadows, blurs), gradients, and typography — lack the ability to display their raw values as custom attributes. When these properties are not backed by a Figma style or variable, users have no way to see the underlying values in the spec output.

Solution

Support custom attribute output for effects, gradients, and typography composites that displays their raw values (e.g., shadow offsets, gradient color stops, font details) when no Figma style or variable is applied.

Acceptance criteria

• Effects (drop shadow, inner shadow, blur) can render raw values as custom attributes
• Gradients can render raw values as custom attributes
• Typography properties can render raw values as custom attributes
• Works correctly when no Figma style or variable is applied

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Implementation details are tracked internally.