# Add light and dark theme visual regression coverage

GitHub: https://github.com/smithersai/smithers/issues/964

Parent: smithers/gh-856-add-responsive-accessibility-and-visual-regression.md

Context: The Smithers UI supports light and dark themes, but current browser coverage only checks that the document theme attribute changes. Acceptance criteria: Add real browser tests for light and dark rendering on the home shell and representative monitor surfaces; add stable screenshot or equivalent rendered assertions; verify theme controls and persisted theme state behave correctly.
