Function buildTheme

cli/src/utils/theme-config.ts:114–141

(
  baseTheme: ChatTheme,
  mode: 'dark' | 'light',
  customColors?: Partial<ChatTheme>,
  plugins?: ThemePlugin[],
)

 * @returns Complete theme with all customizations applied
 */
export const buildTheme = (
  baseTheme: ChatTheme,
  mode: 'dark' | 'light',
  customColors?: Partial<ChatTheme>,
  plugins?: ThemePlugin[],
): ChatTheme => {
  // Start with cloned base theme (cloning handled by caller)
  const theme = { ...baseTheme }

  // Layer 1: Apply global custom colors
  if (customColors) {
    Object.assign(theme, customColors)
  }

  // Layer 2: Apply plugins
  if (plugins) {
    for (const plugin of plugins) {
      const pluginOverrides = plugin.apply(theme, mode)
      Object.assign(theme, pluginOverrides)
    }
  }

  // Final step: Resolve all 'default' values to actual colors
  resolveThemeColors(theme, mode)
  theme.name = mode

  return theme
}