Enforce feature-CSS em-fallback rule with color and transition/animation exclusions#9471

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Commits on May 15, 2026

Add css var fallback ESLint rule and tests

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fregante
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Scope new CSS var fallback rule to warnings in features CSS

Copilot
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fregante
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Enable em fallback lint rule as error and fix feature CSS

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fregante
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Refine CSS fallback fixes to preserve valid value types

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fregante
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Address review feedback on em fallback enforcement

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fregante
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Exclude transition and animation properties from em fallback rule

Copilot
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fregante
authored