refactor: improve type safety and code style

src/components/ui/Button.tsx

@@ -8,7 +8,6 @@ interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
   variant?: ButtonVariant;
   size?: ButtonSize;
   icon?: LucideIcon;
-  iconPosition?: 'left' | 'right';
   isLoading?: boolean;
 }
 
@@ -33,7 +32,6 @@ export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
       variant = 'primary',
       size = 'md',
       icon: Icon,
-      iconPosition = 'left',
       isLoading = false,
       disabled,
       children,

src/components/ui/Card.tsx

@@ -34,7 +34,7 @@ export const Card = forwardRef<HTMLDivElement, CardProps>(
 
 Card.displayName = 'Card';
 
-interface CardHeaderProps extends HTMLAttributes<HTMLDivElement> {}
+type CardHeaderProps = HTMLAttributes<HTMLDivElement>;
 
 export const CardHeader = forwardRef<HTMLDivElement, CardHeaderProps>(
   ({ className = '', children, ...props }, ref) => {
@@ -52,7 +52,7 @@ export const CardHeader = forwardRef<HTMLDivElement, CardHeaderProps>(
 
 CardHeader.displayName = 'CardHeader';
 
-interface CardBodyProps extends HTMLAttributes<HTMLDivElement> {}
+type CardBodyProps = HTMLAttributes<HTMLDivElement>;
 
 export const CardBody = forwardRef<HTMLDivElement, CardBodyProps>(
   ({ className = '', children, ...props }, ref) => {
@@ -66,7 +66,7 @@ export const CardBody = forwardRef<HTMLDivElement, CardBodyProps>(
 
 CardBody.displayName = 'CardBody';
 
-interface CardFooterProps extends HTMLAttributes<HTMLDivElement> {}
+type CardFooterProps = HTMLAttributes<HTMLDivElement>;
 
 export const CardFooter = forwardRef<HTMLDivElement, CardFooterProps>(
   ({ className = '', children, ...props }, ref) => {