Files
LEDMatrix/web_interface/templates
Chuck 3975940cff Add light/dark mode toggle and fix log readability (#243)
* feat(web): add light/dark mode toggle and fix log readability

Add a theme toggle button (moon/sun icon) to the header that switches
between light and dark mode. Theme preference persists in localStorage
and falls back to the OS prefers-color-scheme setting.

The implementation uses a data-theme attribute on <html> with CSS
overrides, so all 13 partial templates and 20+ widget JS files get
dark mode support without any modifications — only 3 files changed.

Also fixes log timestamp readability: text-gray-500 had ~3.5:1 contrast
ratio against the dark log background, now uses text-gray-400 (~5.3:1)
which passes WCAG AA in both light and dark mode.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(web): address dark mode review — accessibility, robustness, and code quality

- WCAG touch target: enforce 44×44px minimum on theme toggle button
  with display:inline-flex centering
- Accessibility: add type="button", aria-pressed (dynamically updated),
  aria-hidden on decorative icons, and contextual aria-label/title that
  reflects current state ("Switch to light/dark mode")
- Robustness: wrap all localStorage and matchMedia calls in try/catch
  with fallbacks for private browsing and restricted contexts; use
  addListener fallback for older browsers lacking addEventListener
- Stylelint: convert all rgba() to modern rgb(…/…%) notation across
  both light and dark theme shadows and gradients
- DRY: replace hardcoded hex values in dark mode utility overrides and
  component overrides with CSS variable references (--color-surface,
  --color-background, --color-border, --color-text-primary, etc.)
- Remove redundant [data-theme="dark"] body rule (body already uses
  CSS variables that are redefined under the dark theme selector)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Co-authored-by: Chuck <chuck@example.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-12 21:12:37 -05:00
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