fix(ui): add RadioGroup to build and fix TypeScript errors in tests

- Add RadioGroup.tsx to tsup entry points (was missing from build)
- Fix HTMLTextareaElement casing in Textarea tests (should be HTMLTextAreaElement)
- Remove unused variables in test files (user, container)

Fixes CI type-check and build failures.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/ui/src/Checkbox/Checkbox.test.tsx

@@ -311,7 +311,6 @@ describe('Checkbox', () => {
     });
 
     it('should call onBlur when blurred', async () => {
-      const user = userEvent.setup();
       const handleBlur = vi.fn();
       render(<Checkbox onBlur={handleBlur} />);
 

packages/ui/src/Radio/Radio.test.tsx

@@ -178,7 +178,7 @@ describe('Radio', () => {
 
   describe('Label Position', () => {
     it('should position label on the right by default', () => {
-      const { container } = render(
+      render(
         <RadioGroup name="test">
           <Radio value="option1" label="Right label" />
         </RadioGroup>
@@ -189,7 +189,7 @@ describe('Radio', () => {
     });
 
     it('should position label on the left when specified', () => {
-      const { container } = render(
+      render(
         <RadioGroup name="test">
           <Radio value="option1" label="Left label" labelPosition="left" />
         </RadioGroup>

packages/ui/src/Slider/Slider.test.tsx

@@ -139,7 +139,7 @@ describe('Slider', () => {
         { value: 50, label: 'Mid' },
         { value: 100, label: 'Max' },
       ];
-      const { container } = render(<Slider marks={marks} />);
+      render(<Slider marks={marks} />);
 
       expect(screen.getByText('Min')).toBeInTheDocument();
       expect(screen.getByText('Mid')).toBeInTheDocument();
@@ -331,7 +331,6 @@ describe('Slider', () => {
 
   describe('Keyboard Navigation', () => {
     it('should support arrow key navigation', async () => {
-      const user = userEvent.setup();
       render(<Slider defaultValue={50} min={0} max={100} step={10} />);
 
       const slider = screen.getByRole('slider') as HTMLInputElement;

packages/ui/src/Textarea/Textarea.test.tsx

@@ -368,7 +368,7 @@ describe('Textarea', () => {
 
   describe('Ref Forwarding', () => {
     it('forwards ref to textarea element', () => {
-      let ref: HTMLTextareaElement | null = null;
+      let ref: HTMLTextAreaElement | null = null;
       render(
         <Textarea
           ref={(el) => {
@@ -381,7 +381,7 @@ describe('Textarea', () => {
     });
 
     it('allows programmatic focus via ref', () => {
-      let ref: HTMLTextareaElement | null = null;
+      let ref: HTMLTextAreaElement | null = null;
       render(
         <Textarea
           data-testid="textarea"
@@ -398,7 +398,7 @@ describe('Textarea', () => {
     });
 
     it('allows reading value via ref', () => {
-      let ref: HTMLTextareaElement | null = null;
+      let ref: HTMLTextAreaElement | null = null;
       render(
         <Textarea
           defaultValue="Test value"

packages/ui/tsup.config.ts

@@ -30,6 +30,9 @@ const entries = allFiles.filter((file) => {
   return folderName === fileName;
 });
 
+// Manually add RadioGroup which doesn't match the folder/file naming convention
+entries.push('src/Radio/RadioGroup.tsx');
+
 export default defineConfig({
   entry: entries,
   format: ['esm'],