feat: add dark mode with theme toggle#23
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Apr 18, 2026
- Dark mode set as default theme with light/dark toggle in header - Theme preference persists via chrome.storage.local - Colors managed through CSS variables (13 design tokens remapped) - Toggle button with sun/moon SVG icon in pill-shaped style https://claude.ai/code/session_0163Hnh7u3X82Wn4twSP7P28
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Summary
chrome.storage.localvar()tokens — no hardcoded overridesWhy
The current light-only theme can be harsh on the eyes, especially for users who open new tabs frequently at night. Dark mode is the most-requested visual feature for new tab extensions.
What's included
[data-theme="dark"]block remaps all 13 design tokens (ink, paper, card-bg, accents, status colors, shadow) plus a reduced paper-texture opacity. Also adds.theme-togglebutton styles matching the existingaction-btndesign language.<button>in the header with a sun/moon SVG icon and a text label ("Light" / "Dark").loadTheme()reads from storage on page load (defaults to"dark"),applyTheme()sets thedata-themeattribute and swaps the icon,toggleTheme()flips and persists.How it works
loadTheme()readschrome.storage.local.theme— if unset (first install), defaults to"dark"data-theme="dark"on<html>, which activates the CSS variable overrides"light", saves to storage, swaps the icon to a moonTest plan
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