fix: mask-size for brand icons

[pqoqubbw]

Summary

Test Plan

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Note

Low Risk
Small, localized styling change limited to icon rendering; risk is mainly visual regressions in specific icon variants.

Overview
Fixes Icon SVG masking for Lucide brand icons by conditionally applying maskSize: "100%" only when iconLibrary is lucide and the icon is not a Font Awesome brand (via isBrandsIcon).

This prevents brand icons from being scaled incorrectly while keeping the previous sizing behavior for other Lucide icons.

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