interface AgentUITheme {
    colors: {
    userBubble: string;
    userBubbleText: string;
    assistantBubble: string;
    assistantBubbleText: string;
    toolCall: string;
    toolCallText: string;
    reasoning: string;
    reasoningText: string;
    error: string;
    errorText: string;
    border: string;
    background: string;
    text: string;
    textMuted: string;
    primary: string;
    primaryText: string;
  };
    spacing: {
    xs: string;
    sm: string;
    md: string;
    lg: string;
    xl: string;
  };
    borderRadius: {
    sm: string;
    md: string;
    lg: string;
    full: string;
  };
    fonts: {
    body: string;
    mono: string;
  };
}