Function applyTheme

frontend/src/store/themeStore.ts:50–69

(theme: Theme)

);

function applyTheme(theme: Theme) {
  const root = document.documentElement;

  // Disable transitions during the prompt switch to prevent "jank"
  // where different elements transition at different speeds.
  root.classList.add('theme-switching');

  if (theme === 'dark') {
    root.classList.add('dark');
  } else {
    root.classList.remove('dark');
  }

  // Force reflow to flush changes while transitions are disabled
  // eslint-disable-next-line @typescript-eslint/no-unused-expressions
  root.offsetHeight;

  // Re-enable transitions
  root.classList.remove('theme-switching');
}

// Initialize theme on module load (handles initial page load)
export function initializeTheme() {