Devlog 25: Theme Toggle Implementation with Dark and Light Modes

Light Theme Tokens Override

• Added :root[data-theme=“light”] in global.css to swap semantic theme variables for light background, borders, and high-contrast amber accents.
• Preserved existing component styles while smoothly transitioning body colors on theme switch.

Sidebar Toggle Component and Logic

• Integrated a theme toggle button (#theme-toggle-btn) inside the BaseLayout header actions.
• Built persistent theme state logic using localStorage and system prefers-color-scheme detection.
• Used textContent on icon elements to dynamically switch between dark_mode and light_mode icons without type errors.