fix(text-field): Show clear button in TextField only when it is filled and hovered/focused (#1713)

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## Self Checklist

- [x] I wrote a PR title in **English** and added an appropriate
**label** to the PR.
- [x] I wrote the commit message in **English** and to follow [**the
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specification**](https://www.conventionalcommits.org/en/v1.0.0/).
- [x] I [added the
**changeset**](https://github.com/changesets/changesets/blob/main/docs/adding-a-changeset.md)
about the changes that needed to be released. (or didn't have to)
- [x] I wrote or updated **documentation** related to the changes. (or
didn't have to)
- [x] I wrote or updated **tests** related to the changes. (or didn't
have to)
- [x] I tested the changes in various browsers. (or didn't have to)
  - Windows: Chrome, Edge, (Optional) Firefox
  - macOS: Chrome, Edge, Safari, (Optional) Firefox

## Related Issue
<!-- Please link to issue if one exists -->

Fixes #502 

## Summary
<!-- Please brief explanation of the changes made -->

input에 값이 채워져있고, focus되거나 hover되었을 때만 내용 삭제 버튼이 나오도록 변경합니다.

## Details
<!-- Please elaborate description of the changes -->

```tsx
// TextField.tsx

// before
const activeClear = activeInput && allowClear

// after
const activeClear = activeInput && allowClear && !!normalizedValue

return (
  ...
    { activeClear && ClearComponent }
  ...
)
```

기존에 `ClearComponent` 의 렌더링 조건에는 `value`에 대한 것이 없었습니다. 그래서
`!!normalizedValue`를 통해 input 태그에 값이 있어야지만 내용 삭제 버튼이 렌더링되도록 하였습니다.

### Breaking change? (Yes/No)
<!-- If Yes, please describe the impact and migration path for users -->

No

Author: jintak0401

.changeset/lazy-bikes-allow.md

@@ -0,0 +1,5 @@
+---
+"@channel.io/bezier-react": patch
+---
+
+Show clear button in TextField only when its value is not empty and focused/hovered.

packages/bezier-react/src/components/Forms/Inputs/TextField/TextField.test.tsx

@@ -1,22 +1,30 @@
 import React from 'react'
 
 import { fireEvent } from '@testing-library/dom'
-import { act } from '@testing-library/react'
+import {
+  act,
+  within,
+} from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
 
 import { LightFoundation } from '~/src/foundation'
 
 import { render } from '~/src/utils/testUtils'
 
 import { COMMON_IME_CONTROL_KEYS } from '~/src/components/Forms/Inputs/constants/CommonImeControlKeys'
 
-import TextField, { TEXT_INPUT_TEST_ID } from './TextField'
+import TextField, {
+  TEXT_INPUT_CLEAR_ICON_TEST_ID,
+  TEXT_INPUT_TEST_ID,
+} from './TextField'
 import {
   type TextFieldProps,
   TextFieldVariant,
 } from './TextField.types'
 import { getProperTextFieldBgColor } from './TextFieldUtils'
 
 describe('TextField', () => {
+  const user = userEvent.setup()
   let props: TextFieldProps
 
   beforeEach(() => {
@@ -285,4 +293,54 @@ describe('TextField', () => {
       })
     })
   })
+
+  describe('show remove button only when it is filled and focused/hovered', () => {
+    it('disappear when empty & focused/hovered', async () => {
+      const { getByTestId } = renderComponent({ value: '', allowClear: true })
+      const rendered = getByTestId(TEXT_INPUT_TEST_ID)
+      const input = rendered.getElementsByTagName('input')[0]
+
+      await act(async () => {
+        await user.hover(input)
+        input.focus()
+      })
+
+      const clearButton = within(rendered).queryByTestId(TEXT_INPUT_CLEAR_ICON_TEST_ID)
+      expect(clearButton).toBeNull()
+    })
+
+    it('disappear when filled & not focused/hovered', () => {
+      const { getByTestId } = renderComponent({ value: 'test', allowClear: true })
+      const rendered = getByTestId(TEXT_INPUT_TEST_ID)
+
+      const clearButton = within(rendered).queryByTestId(TEXT_INPUT_CLEAR_ICON_TEST_ID)
+      expect(clearButton).toBeNull()
+    })
+
+    it('appear when filled & hovered', async () => {
+      const { getByTestId } = renderComponent({ value: 'test', allowClear: true })
+      const rendered = getByTestId(TEXT_INPUT_TEST_ID)
+      const input = rendered.getElementsByTagName('input')[0]
+
+      await act(async () => {
+        await user.hover(input)
+      })
+
+      const clearButton = within(rendered).getByTestId(TEXT_INPUT_CLEAR_ICON_TEST_ID)
+      expect(clearButton).toBeInTheDocument()
+    })
+
+    it('appear when filled & focused', () => {
+      const { getByTestId } = renderComponent({ value: 'test', allowClear: true })
+      const rendered = getByTestId(TEXT_INPUT_TEST_ID)
+      const input = rendered.getElementsByTagName('input')[0]
+
+      act(() => {
+        input.focus()
+      })
+
+      const clearButton = within(rendered).getByTestId(TEXT_INPUT_CLEAR_ICON_TEST_ID)
+      expect(clearButton).toBeInTheDocument()
+    })
+  })
 })

packages/bezier-react/src/components/Forms/Inputs/TextField/TextField.tsx

@@ -45,6 +45,7 @@ import {
 import Styled from './TextField.styled'
 
 export const TEXT_INPUT_TEST_ID = 'bezier-react-text-input'
+export const TEXT_INPUT_CLEAR_ICON_TEST_ID = 'bezier-react-text-input-clear-icon'
 
 function TextFieldComponent({
   name,
@@ -117,7 +118,7 @@ forwardedRef: Ref<TextFieldRef>,
   ), [value])
 
   const activeInput = !disabled && !readOnly
-  const activeClear = activeInput && allowClear
+  const activeClear = activeInput && allowClear && !isEmpty(normalizedValue)
 
   const inputRef = useRef<HTMLInputElement | null>(null)
 
@@ -363,8 +364,9 @@ forwardedRef: Ref<TextFieldRef>,
       onClick={handleClear}
     >
       {
-        normalizedValue && normalizedValue.length > 0 && (focused || hovered) && (
+        (focused || hovered) && (
           <Icon
+            testId={TEXT_INPUT_CLEAR_ICON_TEST_ID}
             source={CancelCircleFilledIcon}
             size={IconSize.XS}
           />
@@ -375,7 +377,6 @@ forwardedRef: Ref<TextFieldRef>,
     focused,
     handleClear,
     hovered,
-    normalizedValue,
   ])
 
   return (