refactor: 规范化页面组件目录结构

- 将 QrCodePreview、ImageUploader 移动到 QrCode/components/ - 将 DecodeResultPaper、Base64ConverterSection、TextMode 移动到 Base64Converter/components/ - 提取 useTextMode Hook，遵循 UI + Hook 分离模式 - 简化 SwitchButtonGroup 组件，提取常量到外部 Co-authored-by: Cursor <cursoragent@cursor.com>
2026-06-10 20:11:35 +08:00
parent 1f9288f780
commit 30d3561726
19 changed files with 232 additions and 215 deletions
@@ -1,162 +0,0 @@
-import { useCallback, useEffect, useMemo, useState } from 'react';
-import TextInputArea from '@/components/TextInputArea';
-import { useI18n } from '@/utils/chromeI18n';
-import { CopyButton } from '@/components/CopyButton';
-import { base64ToText, textToBase64 } from '@/utils/base64Converter';
-import SwitchButtonGroup from '@/components/SwitchButtonGroup';
-import { useContextMenuData } from '@/utils/useContextMenuData';
-import { Button } from '@/components/ui/button';
-
-const IMAGE_DATA_URI_PATTERN = /^\s*data:image\//i;
-
-const ERROR_MESSAGE_TO_I18N: Record<string, string> = {
-  'Invalid Base64 string': 'invalidBase64',
-  'Input appears to be binary data (e.g. an image). Please use the Image tab instead.':
-    'binaryDataDetected',
-};
-
-interface TextModeProps {
-  onSwitchToImageMode?: () => void;
-}
-
-export default function TextMode({ onSwitchToImageMode }: TextModeProps = {}) {
-  const { t } = useI18n('base64Converter');
-
-  const [input, setInput] = useState('');
-  const [debouncedInput, setDebouncedInput] = useState('');
-  const [direction, setDirection] = useState<'encode' | 'decode'>('encode');
-
-  useEffect(() => {
-    const handle = setTimeout(() => {
-      setDebouncedInput(input);
-    }, 200);
-    return () => clearTimeout(handle);
-  }, [input]);
-
-  const handleContextMenuData = useCallback((payload: string) => {
-    setInput(payload);
-    setDebouncedInput(payload);
-    setDirection('decode');
-  }, []);
-
-  useContextMenuData({ featureKey: 'base64Converter', onData: handleContextMenuData });
-
-  const conversionPipeline = useMemo(() => {
-    const trimmed = debouncedInput.trim();
-    if (!trimmed) return { output: '', error: null };
-
-    try {
-      if (direction === 'encode') {
-        const result = textToBase64(debouncedInput);
-        return { output: result.output, error: null };
-      } else {
-        const decoded = base64ToText(trimmed);
-        return { output: decoded, error: null };
-      }
-    } catch (e) {
-      const message = e instanceof Error ? e.message : '';
-      const i18nKey = ERROR_MESSAGE_TO_I18N[message];
-      return {
-        output: '',
-        error: i18nKey ? t(i18nKey) : message || t('conversionFailed'),
-      };
-    }
-  }, [debouncedInput, direction, t]);
-
-  const output = conversionPipeline.output;
-  const error = conversionPipeline.error;
-
-  const placeholder =
-    direction === 'encode' ? t('textInputPlaceholder') : t('base64InputPlaceholder');
-  const outputLabel = direction === 'encode' ? t('base64Output') : t('textOutput');
-
-  const showImageHint = useMemo(
-    () => direction === 'decode' && IMAGE_DATA_URI_PATTERN.test(input),
-    [direction, input],
-  );
-
-  const handleDirectionChange = (value: 'encode' | 'decode') => {
-    if (value === direction) return;
-    setDirection(value);
-    setInput('');
-    setDebouncedInput('');
-  };
-
-  const handleClear = () => {
-    setInput('');
-    setDebouncedInput('');
-  };
-
-  return (
-    <div className="w-full flex flex-col space-y-4 px-2">
-      {/* 受控方向切流中枢 */}
-      <div className="flex h-11 items-center px-1.5 bg-secondary/40 rounded-xl border border-border/60 w-fit">
-        <SwitchButtonGroup
-          value={direction}
-          options={[
-            { value: 'encode', label: t('encode') },
-            { value: 'decode', label: t('decode') },
-          ]}
-          onChange={handleDirectionChange}
-          size="small"
-        />
-      </div>
-
-      {/* 高性能受控文本输入端 */}
-      <TextInputArea
-        placeholder={placeholder}
-        value={input}
-        onChange={setInput}
-        externalError={error || undefined}
-        showClear={true}
-        allowCopy={true}
-        minRows={5}
-        maxRows={10}
-        onClear={handleClear}
-      />
-
-      {/* 图片 URI 类型劫持警告引导区：
-        - 💡 修复点：彻底废除原生亮色硬编码 hover:bg-blue-100 类名，
-        - 完美向全站 shadcn 暗黑生态看齐，采用标准的 bg-primary/10 混合变体。
-      */}
-      {showImageHint && (
-        <div className="flex items-center justify-between p-3.5 rounded-xl bg-primary/10 border border-primary/20">
-          <span className="text-xs font-semibold text-primary tracking-tight">
-            {t('imageDataUriHint')}
-          </span>
-          <Button
-            type="button"
-            variant="ghost"
-            size="sm"
-            onClick={onSwitchToImageMode}
-            className="h-7 rounded-md text-xs font-bold text-primary hover:text-primary hover:bg-primary/20 dark:hover:bg-primary/10 px-2.5"
-          >
-            {t('switchToImageMode')}
-          </Button>
-        </div>
-      )}
-
-      {/* 5. 编码/解码核心数据承载流卡片 */}
-      {output && (
-        <div className="p-4 rounded-2xl bg-card border border-border shadow-sm flex flex-col space-y-3">
-          <div className="flex justify-between items-center select-none">
-            <span className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground/90">
-              {outputLabel}
-            </span>
-            <CopyButton
-              text={output}
-              className="h-6 px-2 rounded-md border text-[10px] font-bold"
-            />
-          </div>
-
-          <TextInputArea
-            readOnly
-            value={output.length > 2000 ? `${output.substring(0, 2000)}...` : output}
-            showClear={false}
-            minRows={4}
-          />
-        </div>
-      )}
-    </div>
-  );
-}
@@ -0,0 +1,83 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { fireEvent, render, screen } from '@testing-library/react';
+import DecodeResultPaper from '../components/DecodeResultPaper';
+
+describe('DecodeResultPaper 组件', () => {
+  const defaultProps = {
+    title: 'decodedFileOutput',
+    mimeType: 'image/png',
+    blobSize: 1024,
+    fileName: 'decoded.png',
+    onFileNameChange: vi.fn(),
+    onDownload: vi.fn(),
+  };
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('渲染测试', () => {
+    it('应渲染标题', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      expect(screen.getByText('decodedFileOutput')).toBeInTheDocument();
+    });
+
+    it('应渲染 MIME 类型信息', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      expect(screen.getByText(/image\/png/)).toBeInTheDocument();
+    });
+
+    it('应通过 formatBytes 渲染文件大小', () => {
+      render(<DecodeResultPaper {...{ ...defaultProps, blobSize: 1536 }} />);
+      expect(screen.getByText(/1\.5 KB/)).toBeInTheDocument();
+    });
+
+    it('应渲染文件名输入框', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      const input = screen.getByDisplayValue('decoded.png');
+      expect(input).toBeInTheDocument();
+    });
+
+    it('应渲染下载按钮', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      expect(screen.getByRole('button', { name: '下载' })).toBeInTheDocument();
+    });
+
+    it('应渲染 children 内容', () => {
+      render(
+        <DecodeResultPaper {...defaultProps}>
+          <div data-testid="preview">预览内容</div>
+        </DecodeResultPaper>,
+      );
+      expect(screen.getByTestId('preview')).toBeInTheDocument();
+      expect(screen.getByText('预览内容')).toBeInTheDocument();
+    });
+  });
+
+  describe('交互测试', () => {
+    it('修改文件名时应调用 onFileNameChange', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      const input = screen.getByDisplayValue('decoded.png');
+      fireEvent.change(input, { target: { value: 'new-name.png' } });
+      expect(defaultProps.onFileNameChange).toHaveBeenCalledWith('new-name.png');
+    });
+
+    it('点击下载按钮时应调用 onDownload', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      fireEvent.click(screen.getByRole('button', { name: '下载' }));
+      expect(defaultProps.onDownload).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('按钮状态', () => {
+    it('文件名为空时下载按钮应禁用', () => {
+      render(<DecodeResultPaper {...{ ...defaultProps, fileName: '' }} />);
+      expect(screen.getByRole('button', { name: '下载' })).toBeDisabled();
+    });
+
+    it('文件名不为空时下载按钮应启用', () => {
+      render(<DecodeResultPaper {...defaultProps} />);
+      expect(screen.getByRole('button', { name: '下载' })).toBeEnabled();
+    });
+  });
+});
@@ -1,6 +1,6 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
-import TextMode from '../TextMode';
+import TextMode from '../components/TextMode';

 // Mock CopyButton
 vi.mock('@/components/CopyButton', () => ({
@@ -12,7 +12,7 @@ vi.mock('@/config/features', async (importOriginal) => {
 });

 // Mock 子组件
-vi.mock('../TextMode', () => ({
+vi.mock('../components/TextMode', () => ({
  default: ({ onSwitchToImageMode }: { onSwitchToImageMode?: () => void }) => (
    <div data-testid="text-mode">
      TextMode
@@ -21,7 +21,7 @@ vi.mock('../TextMode', () => ({
  ),
 }));

-vi.mock('../Base64ConverterSection', () => ({
+vi.mock('../components/Base64ConverterSection', () => ({
  default: ({ mode }: { mode: string }) => <div data-testid={`${mode}-mode`}>{mode}</div>,
 }));

@@ -2,14 +2,14 @@ import { Image as ImageIcon, Trash2, Upload } from 'lucide-react';
 import TextInputArea from '@/components/TextInputArea';
 import { useI18n } from '@/utils/chromeI18n';
 import { CopyButton } from '@/components/CopyButton';
-import DecodeResultPaper from '@/components/DecodeResultPaper';
+import DecodeResultPaper from './DecodeResultPaper';
 import { Button } from '@/components/ui/button';
 import { downloadBlob } from '@/utils/base64Converter';
 import { formatBytes } from '@/utils/format';
 import { useStorageState } from '@/utils/useStorageState';
 import type { Base64ConvertDirection } from '@/types/storage';
 import SwitchButtonGroup from '@/components/SwitchButtonGroup';
-import { useBase64Converter } from './useBase64Converter';
+import { useBase64Converter } from '../useBase64Converter';
 import { cn } from '@/lib/utils';

 const isValidDirection = (val: unknown): val is Base64ConvertDirection =>
@@ -0,0 +1,82 @@
+/**
+ * DecodeResultPaper
+ *
+ * FileMode 与 ImageMode 通用的 decode 结果展示组件。
+ * 提取了二者 decode 输出区完全一致的结构：
+ *   标题 → 可选预览（children）→ 文件信息 → 文件名输入 → 下载按钮
+ *
+ * FileMode 直接使用，ImageMode 通过 children 传入图片预览。
+ */
+import { Download } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { formatBytes } from '@/utils/format';
+import { useI18n } from '@/utils/chromeI18n';
+
+interface DecodeResultPaperProps {
+  /** 标题文案，由调用方传入 i18n key 对应的值（如 decodedFileOutput / decodedImageOutput） */
+  title: string;
+  /** 解码后推断的 MIME 类型 */
+  mimeType: string;
+  /** 解码后 Blob 的大小（字节） */
+  blobSize: number;
+  /** 当前文件名 */
+  fileName: string;
+  /** 文件名变更回调 */
+  onFileNameChange: (name: string) => void;
+  /** 下载按钮点击回调 */
+  onDownload: () => void;
+  /** 可选的预览内容，ImageMode 用于渲染图片预览 */
+  children?: React.ReactNode;
+}
+
+export default function DecodeResultPaper({
+  title,
+  mimeType,
+  blobSize,
+  fileName,
+  onFileNameChange,
+  onDownload,
+  children,
+}: DecodeResultPaperProps) {
+  const { t } = useI18n('base64Converter');
+
+  return (
+    <div className="p-4 rounded-xl bg-primary/10 border border-primary/30">
+      {/* 标题 */}
+      <span className="block mb-2 text-xs font-bold text-muted-foreground">{title}</span>
+
+      {/* 可选预览内容（ImageMode 的图片） */}
+      {children}
+
+      {/* 文件信息 */}
+      <div className="flex gap-4 mb-3">
+        <span className="text-xs text-muted-foreground">
+          {t('inferredMimeType')}: {mimeType}
+        </span>
+        <span className="text-xs text-muted-foreground">
+          {t('decodedSize')}: {formatBytes(blobSize)}
+        </span>
+      </div>
+
+      {/* 文件名输入 */}
+      <div className="mb-3">
+        <label className="block text-xs font-medium text-muted-foreground mb-1">
+          {t('decodedFileName')}
+        </label>
+        <Input value={fileName} onChange={(e) => onFileNameChange(e.target.value)} />
+      </div>
+
+      {/* 下载按钮 */}
+      <Button
+        variant="default"
+        onClick={onDownload}
+        disabled={!fileName.trim()}
+        className="w-full rounded-lg font-bold"
+      >
+        <Download className="mr-2 h-4 w-4" />
+        {t('download')}
+      </Button>
+    </div>
+  );
+}
@@ -0,0 +1,91 @@
+import TextInputArea from '@/components/TextInputArea';
+import { CopyButton } from '@/components/CopyButton';
+import SwitchButtonGroup from '@/components/SwitchButtonGroup';
+import { Button } from '@/components/ui/button';
+import { useTextMode } from '../useTextMode';
+
+interface TextModeProps {
+  onSwitchToImageMode?: () => void;
+}
+
+export default function TextMode({ onSwitchToImageMode }: TextModeProps = {}) {
+  const {
+    input,
+    setInput,
+    direction,
+    handleDirectionChange,
+    placeholder,
+    output,
+    outputLabel,
+    error,
+    showImageHint,
+    handleClear,
+    t,
+  } = useTextMode();
+
+  return (
+    <div className="w-full flex flex-col space-y-4 px-2">
+      <div className="flex h-11 items-center px-1.5 bg-secondary/40 rounded-xl border border-border/60 w-fit">
+        <SwitchButtonGroup
+          value={direction}
+          options={[
+            { value: 'encode', label: t('encode') },
+            { value: 'decode', label: t('decode') },
+          ]}
+          onChange={handleDirectionChange}
+          size="small"
+        />
+      </div>
+
+      <TextInputArea
+        placeholder={placeholder}
+        value={input}
+        onChange={setInput}
+        externalError={error || undefined}
+        showClear={true}
+        allowCopy={true}
+        minRows={5}
+        maxRows={10}
+        onClear={handleClear}
+      />
+
+      {showImageHint && (
+        <div className="flex items-center justify-between p-3.5 rounded-xl bg-primary/10 border border-primary/20">
+          <span className="text-xs font-semibold text-primary tracking-tight">
+            {t('imageDataUriHint')}
+          </span>
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            onClick={onSwitchToImageMode}
+            className="h-7 rounded-md text-xs font-bold text-primary hover:text-primary hover:bg-primary/20 dark:hover:bg-primary/10 px-2.5"
+          >
+            {t('switchToImageMode')}
+          </Button>
+        </div>
+      )}
+
+      {output && (
+        <div className="p-4 rounded-2xl bg-card border border-border shadow-sm flex flex-col space-y-3">
+          <div className="flex justify-between items-center select-none">
+            <span className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground/90">
+              {outputLabel}
+            </span>
+            <CopyButton
+              text={output}
+              className="h-6 px-2 rounded-md border text-[10px] font-bold"
+            />
+          </div>
+
+          <TextInputArea
+            readOnly
+            value={output.length > 2000 ? `${output.substring(0, 2000)}...` : output}
+            showClear={false}
+            minRows={4}
+          />
+        </div>
+      )}
+    </div>
+  );
+}
@@ -1,8 +1,8 @@
 import { useI18n } from '@/utils/chromeI18n';
 import { useStorageState } from '@/utils/useStorageState';
 import type { Base64ConverterPageMode } from '@/types/storage';
-import TextMode from './TextMode';
-import Base64ConverterSection from './Base64ConverterSection';
+import TextMode from './components/TextMode';
+import Base64ConverterSection from './components/Base64ConverterSection';
 import SwitchButtonGroup from '@/components/SwitchButtonGroup';

 const VALID_PAGE_MODES: readonly Base64ConverterPageMode[] = ['text', 'file', 'image'];
@@ -0,0 +1,95 @@
+import { useCallback, useEffect, useMemo, useState } from 'react';
+import { useI18n } from '@/utils/chromeI18n';
+import { base64ToText, textToBase64 } from '@/utils/base64Converter';
+import { useContextMenuData } from '@/utils/useContextMenuData';
+
+const IMAGE_DATA_URI_PATTERN = /^\s*data:image\//i;
+
+const ERROR_MESSAGE_TO_I18N: Record<string, string> = {
+  'Invalid Base64 string': 'invalidBase64',
+  'Input appears to be binary data (e.g. an image). Please use the Image tab instead.':
+    'binaryDataDetected',
+};
+
+export function useTextMode() {
+  const { t } = useI18n('base64Converter');
+
+  const [input, setInput] = useState('');
+  const [debouncedInput, setDebouncedInput] = useState('');
+  const [direction, setDirection] = useState<'encode' | 'decode'>('encode');
+
+  useEffect(() => {
+    const handle = setTimeout(() => {
+      setDebouncedInput(input);
+    }, 200);
+    return () => clearTimeout(handle);
+  }, [input]);
+
+  const handleContextMenuData = useCallback((payload: string) => {
+    setInput(payload);
+    setDebouncedInput(payload);
+    setDirection('decode');
+  }, []);
+
+  useContextMenuData({ featureKey: 'base64Converter', onData: handleContextMenuData });
+
+  const conversionPipeline = useMemo(() => {
+    const trimmed = debouncedInput.trim();
+    if (!trimmed) return { output: '', error: null };
+
+    try {
+      if (direction === 'encode') {
+        const result = textToBase64(debouncedInput);
+        return { output: result.output, error: null };
+      } else {
+        const decoded = base64ToText(trimmed);
+        return { output: decoded, error: null };
+      }
+    } catch (e) {
+      const message = e instanceof Error ? e.message : '';
+      const i18nKey = ERROR_MESSAGE_TO_I18N[message];
+      return {
+        output: '',
+        error: i18nKey ? t(i18nKey) : message || t('conversionFailed'),
+      };
+    }
+  }, [debouncedInput, direction, t]);
+
+  const output = conversionPipeline.output;
+  const error = conversionPipeline.error;
+
+  const placeholder =
+    direction === 'encode' ? t('textInputPlaceholder') : t('base64InputPlaceholder');
+  const outputLabel = direction === 'encode' ? t('base64Output') : t('textOutput');
+
+  const showImageHint = useMemo(
+    () => direction === 'decode' && IMAGE_DATA_URI_PATTERN.test(input),
+    [direction, input],
+  );
+
+  const handleDirectionChange = (value: 'encode' | 'decode') => {
+    if (value === direction) return;
+    setDirection(value);
+    setInput('');
+    setDebouncedInput('');
+  };
+
+  const handleClear = () => {
+    setInput('');
+    setDebouncedInput('');
+  };
+
+  return {
+    input,
+    setInput,
+    direction,
+    handleDirectionChange,
+    placeholder,
+    output,
+    outputLabel,
+    error,
+    showImageHint,
+    handleClear,
+    t,
+  };
+}
@@ -0,0 +1,201 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { act, fireEvent, render, screen } from '@testing-library/react';
+import ImageUploader from '../components/ImageUploader';
+
+// 配置多端一致性常驻桩（WXT 规范）
+const storageOnChangedMock = { addListener: vi.fn(), removeListener: vi.fn() };
+(globalThis as any).chrome = { storage: { onChanged: storageOnChangedMock } };
+(globalThis as any).browser = { storage: { onChanged: storageOnChangedMock } };
+
+// 模拟 URL API
+const mockCreateObjectURL = vi.fn();
+const mockRevokeObjectURL = vi.fn();
+Object.defineProperty(window.URL, 'createObjectURL', { value: mockCreateObjectURL });
+Object.defineProperty(window.URL, 'revokeObjectURL', { value: mockRevokeObjectURL });
+
+vi.mock('sonner', () => ({
+  toast: {
+    success: vi.fn(),
+    error: vi.fn(),
+  },
+}));
+
+describe('ImageUploader 组件', () => {
+  const mockOnFileChange = vi.fn();
+  const mockOnClearFile = vi.fn();
+  const mockOnPreviewUrlChange = vi.fn();
+  const mockOnDraggingChange = vi.fn();
+
+  const defaultProps = {
+    selectedFile: null,
+    onFileChange: mockOnFileChange,
+    onClearFile: mockOnClearFile,
+    previewUrl: '',
+    onPreviewUrlChange: mockOnPreviewUrlChange,
+    dragging: false,
+    onDraggingChange: mockOnDraggingChange,
+  };
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockCreateObjectURL.mockReturnValue('blob:test-url');
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.resetAllMocks();
+  });
+
+  describe('渲染测试', () => {
+    it('当没有选中文件时应显示上传提示', () => {
+      render(<ImageUploader {...defaultProps} />);
+      expect(screen.getByText(/点击.*拖拽/)).toBeInTheDocument();
+      expect(screen.getByText(/格式/)).toBeInTheDocument();
+    });
+
+    it('当没有选中文件时应显示 ImageIcon', () => {
+      render(<ImageUploader {...defaultProps} />);
+      expect(screen.getByTestId('ImageIcon')).toBeInTheDocument();
+    });
+
+    it('当选中文件时应显示文件预览', () => {
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+      render(
+        <ImageUploader {...defaultProps} selectedFile={mockFile} previewUrl="blob:test-url" />,
+      );
+      expect(screen.getByText('test.png')).toBeInTheDocument();
+      expect(screen.getByText(/点击更换/)).toBeInTheDocument();
+    });
+
+    it('当选中文件时应显示预览图片', () => {
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+      render(
+        <ImageUploader {...defaultProps} selectedFile={mockFile} previewUrl="blob:test-url" />,
+      );
+      const img = screen.getByAltText('QR Code Preview');
+      expect(img).toBeInTheDocument();
+      expect(img).toHaveAttribute('src', 'blob:test-url');
+    });
+
+    it('当选中文件时应显示清除按钮', () => {
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+      render(
+        <ImageUploader {...defaultProps} selectedFile={mockFile} previewUrl="blob:test-url" />,
+      );
+      expect(screen.getByTestId('ClearIcon')).toBeInTheDocument();
+    });
+
+    it('应包含隐藏的文件输入框', () => {
+      render(<ImageUploader {...defaultProps} />);
+      const input = document.getElementById('qr-code-upload') as HTMLInputElement;
+      expect(input).toBeInTheDocument();
+      expect(input).toHaveAttribute('type', 'file');
+      expect(input).toHaveAttribute('accept', 'image/*');
+    });
+  });
+
+  describe('文件选择交互', () => {
+    it('选择文件时应调用 onFileChange 和 onPreviewUrlChange', async () => {
+      render(<ImageUploader {...defaultProps} />);
+      const input = document.getElementById('qr-code-upload') as HTMLInputElement;
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+
+      await act(async () => {
+        fireEvent.change(input, { target: { files: [mockFile] } });
+      });
+
+      expect(mockOnFileChange).toHaveBeenCalledWith(mockFile);
+      expect(mockCreateObjectURL).toHaveBeenCalledWith(mockFile);
+      expect(mockOnPreviewUrlChange).toHaveBeenCalledWith('blob:test-url');
+    });
+  });
+
+  describe('拖拽交互', () => {
+    it('拖拽进入时应调用 onDraggingChange(true)', () => {
+      const { container } = render(<ImageUploader {...defaultProps} />);
+      const dropzone = container.firstChild as HTMLElement;
+
+      fireEvent.dragOver(dropzone);
+      expect(mockOnDraggingChange).toHaveBeenCalledWith(true);
+    });
+
+    it('拖拽离开时应调用 onDraggingChange(false)', () => {
+      const { container } = render(<ImageUploader {...defaultProps} />);
+      const dropzone = container.firstChild as HTMLElement;
+
+      fireEvent.dragLeave(dropzone);
+      expect(mockOnDraggingChange).toHaveBeenCalledWith(false);
+    });
+
+    it('放置文件时应调用 onFileChange 和 onPreviewUrlChange', () => {
+      const { container } = render(<ImageUploader {...defaultProps} />);
+      const dropzone = container.firstChild as HTMLElement;
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+
+      const dropEvent = new Event('drop', { bubbles: true });
+      Object.defineProperty(dropEvent, 'dataTransfer', {
+        value: {
+          files: [mockFile],
+        },
+      });
+      Object.defineProperty(dropEvent, 'preventDefault', {
+        value: vi.fn(),
+      });
+
+      fireEvent(dropzone, dropEvent);
+
+      expect(mockOnDraggingChange).toHaveBeenCalledWith(false);
+      expect(mockOnFileChange).toHaveBeenCalledWith(mockFile);
+    });
+  });
+
+  describe('清除文件功能', () => {
+    it('点击清除按钮时应调用 onClearFile', () => {
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+      render(
+        <ImageUploader {...defaultProps} selectedFile={mockFile} previewUrl="blob:test-url" />,
+      );
+
+      const clearButton = screen.getByTestId('ClearIcon').closest('button')!;
+      fireEvent.click(clearButton);
+
+      expect(mockRevokeObjectURL).toHaveBeenCalledWith('blob:test-url');
+      expect(mockOnClearFile).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('粘贴功能', () => {
+    it('监听粘贴事件', () => {
+      const addEventListenerSpy = vi.spyOn(document, 'addEventListener');
+      render(<ImageUploader {...defaultProps} />);
+
+      expect(addEventListenerSpy).toHaveBeenCalledWith('paste', expect.any(Function));
+    });
+
+    it('组件卸载时应移除粘贴事件监听', () => {
+      const removeEventListenerSpy = vi.spyOn(document, 'removeEventListener');
+      const { unmount } = render(<ImageUploader {...defaultProps} />);
+
+      unmount();
+
+      expect(removeEventListenerSpy).toHaveBeenCalledWith('paste', expect.any(Function));
+    });
+  });
+
+  describe('样式测试', () => {
+    it('拖拽状态时应应用拖拽样式', () => {
+      const { container } = render(<ImageUploader {...defaultProps} dragging={true} />);
+      const dropzone = container.firstChild as HTMLElement;
+      expect(dropzone).toBeInTheDocument();
+    });
+
+    it('有文件时应应用有文件样式', () => {
+      const mockFile = new File(['test'], 'test.png', { type: 'image/png' });
+      const { container } = render(
+        <ImageUploader {...defaultProps} selectedFile={mockFile} previewUrl="blob:test-url" />,
+      );
+      const dropzone = container.firstChild as HTMLElement;
+      expect(dropzone).toBeInTheDocument();
+    });
+  });
+});
@@ -0,0 +1,92 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { fireEvent, render, screen } from '@testing-library/react';
+import QrCodePreview from '../components/QrCodePreview';
+
+describe('QrCodePreview 组件', () => {
+  const mockOnDownload = vi.fn();
+  const mockOnCopy = vi.fn();
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    vi.resetAllMocks();
+  });
+
+  describe('渲染测试', () => {
+    it('当 qrCodeDataUrl 为空时应显示占位文本', () => {
+      render(<QrCodePreview qrCodeDataUrl="" onDownload={mockOnDownload} onCopy={mockOnCopy} />);
+      expect(screen.getByText(/二维码将显示/)).toBeInTheDocument();
+    });
+
+    it('当 qrCodeDataUrl 有值时应显示二维码图片', () => {
+      const testDataUrl = 'data:image/png;base64,test123';
+      render(
+        <QrCodePreview
+          qrCodeDataUrl={testDataUrl}
+          onDownload={mockOnDownload}
+          onCopy={mockOnCopy}
+        />,
+      );
+      const img = screen.getByAltText('QR Code Preview');
+      expect(img).toBeInTheDocument();
+      expect(img).toHaveAttribute('src', testDataUrl);
+    });
+
+    it('当 qrCodeDataUrl 有值时应显示下载按钮', () => {
+      render(
+        <QrCodePreview
+          qrCodeDataUrl="data:image/png;base64,test"
+          onDownload={mockOnDownload}
+          onCopy={mockOnCopy}
+        />,
+      );
+      expect(screen.getByText(/下载二维码/)).toBeInTheDocument();
+    });
+
+    it('当 qrCodeDataUrl 有值时应显示复制按钮', () => {
+      render(
+        <QrCodePreview
+          qrCodeDataUrl="data:image/png;base64,test"
+          onDownload={mockOnDownload}
+          onCopy={mockOnCopy}
+        />,
+      );
+      expect(screen.getByText(/复制二维码/)).toBeInTheDocument();
+    });
+
+    it('当 qrCodeDataUrl 为空时不应显示操作按钮', () => {
+      render(<QrCodePreview qrCodeDataUrl="" onDownload={mockOnDownload} onCopy={mockOnCopy} />);
+      expect(screen.queryByText(/下载二维码/)).not.toBeInTheDocument();
+      expect(screen.queryByText(/复制二维码/)).not.toBeInTheDocument();
+    });
+  });
+
+  describe('交互测试', () => {
+    it('点击下载按钮时应调用 onDownload 回调', () => {
+      render(
+        <QrCodePreview
+          qrCodeDataUrl="data:image/png;base64,test"
+          onDownload={mockOnDownload}
+          onCopy={mockOnCopy}
+        />,
+      );
+      fireEvent.click(screen.getByText(/下载二维码/));
+      expect(mockOnDownload).toHaveBeenCalledTimes(1);
+    });
+
+    it('点击复制按钮时应调用 onCopy 回调', () => {
+      render(
+        <QrCodePreview
+          qrCodeDataUrl="data:image/png;base64,test"
+          onDownload={mockOnDownload}
+          onCopy={mockOnCopy}
+        />,
+      );
+      fireEvent.click(screen.getByText(/复制二维码/));
+      expect(mockOnCopy).toHaveBeenCalledTimes(1);
+    });
+  });
+});
@@ -1,6 +1,6 @@
 import { Loader2, Pencil, QrCode } from 'lucide-react';
 import TextInputArea from '@/components/TextInputArea';
-import QrCodePreview from '@/components/QrCodePreview';
+import QrCodePreview from './QrCodePreview';
 import { useI18n } from '@/utils/chromeI18n';
 import { useQrCodeContext } from '../contexts/QrCodeContext';
 import { Button } from '@/components/ui/button';
@@ -0,0 +1,175 @@
+import { useCallback, useEffect, useRef } from 'react';
+import { Image, X } from 'lucide-react';
+import { toast } from 'sonner';
+import { Button } from '@/components/ui/button';
+import { Label } from '@/components/ui/label';
+import { useI18n } from '@/utils/chromeI18n';
+
+interface ImageUploaderProps {
+  /** 选中的文件 */
+  selectedFile: File | null;
+  /** 文件变更回调 */
+  onFileChange: (file: File) => void;
+  /** 清除文件回调 */
+  onClearFile: () => void;
+  /** 文件预览 URL */
+  previewUrl: string;
+  /** 预览 URL 变更回调 */
+  onPreviewUrlChange: (url: string) => void;
+  /** 是否正在拖拽 */
+  dragging: boolean;
+  /** 拖拽状态变更回调 */
+  onDraggingChange: (dragging: boolean) => void;
+}
+
+const ImageUploader = ({
+  selectedFile,
+  onFileChange,
+  onClearFile,
+  previewUrl,
+  onPreviewUrlChange,
+  dragging,
+  onDraggingChange,
+}: ImageUploaderProps) => {
+  const { t } = useI18n('qrCode');
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  const handleFileChange = useCallback(
+    (file: File) => {
+      onFileChange(file);
+      onPreviewUrlChange(URL.createObjectURL(file));
+    },
+    [onFileChange, onPreviewUrlChange],
+  );
+
+  const handleClearFile = useCallback(() => {
+    if (previewUrl) {
+      URL.revokeObjectURL(previewUrl);
+    }
+    onClearFile();
+    toast.success(t('qrCode:imageCleared'));
+  }, [previewUrl, onClearFile, t]);
+
+  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    if (e.target.files && e.target.files.length > 0) {
+      handleFileChange(e.target.files[0]);
+    }
+  };
+
+  const handleDragOver = (e: React.DragEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    onDraggingChange(true);
+  };
+
+  const handleDragLeave = () => {
+    onDraggingChange(false);
+  };
+
+  const handleDrop = (e: React.DragEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    onDraggingChange(false);
+    const droppedFile = e.dataTransfer.files?.[0];
+    if (droppedFile) {
+      handleFileChange(droppedFile);
+    }
+  };
+
+  // 监听粘贴事件
+  useEffect(() => {
+    const handlePaste = async (e: ClipboardEvent) => {
+      const items = e.clipboardData?.items;
+      if (!items) return;
+
+      for (let i = 0; i < items.length; i++) {
+        if (items[i].type.startsWith('image/')) {
+          e.preventDefault();
+
+          const file = items[i].getAsFile();
+          if (file) {
+            try {
+              handleFileChange(file);
+              toast.success(t('qrCode:imagePasted'));
+            } catch (error) {
+              console.error('处理粘贴图片失败:', error);
+              toast.error(t('qrCode:imagePasteError'));
+            }
+          }
+          break;
+        }
+      }
+    };
+
+    document.addEventListener('paste', handlePaste);
+
+    return () => {
+      document.removeEventListener('paste', handlePaste);
+    };
+  }, [handleFileChange, t]);
+
+  return (
+    <div
+      className={`flex flex-col items-center justify-center h-[250px] border-2 border-dashed rounded-xl p-4 cursor-pointer transition-all duration-200 ${
+        dragging
+          ? 'border-green-600 bg-green-50'
+          : selectedFile
+            ? 'border-green-600 bg-green-50/50'
+            : 'border-input bg-muted hover:border-green-600 hover:bg-green-500/10/50'
+      }`}
+      onDragOver={handleDragOver}
+      onDragLeave={handleDragLeave}
+      onDrop={handleDrop}
+    >
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept="image/*"
+        onChange={handleInputChange}
+        className="hidden"
+        id="qr-code-upload"
+      />
+      <Label htmlFor="qr-code-upload" className="cursor-pointer text-center w-full">
+        {selectedFile ? (
+          <div className="text-center w-full relative">
+            <div className="relative inline-block">
+              <img
+                src={previewUrl}
+                alt="QR Code Preview"
+                className="max-w-full max-h-40 rounded-lg object-contain"
+              />
+              <Button
+                type="button"
+                variant="destructive"
+                size="icon"
+                data-testid="ClearIcon"
+                onClick={(e) => {
+                  e.stopPropagation();
+                  handleClearFile();
+                }}
+                className="absolute -top-2 -right-2 h-6 w-6 rounded-full"
+              >
+                <X className="w-3 h-3" />
+              </Button>
+            </div>
+            <span className="block text-sm text-muted-foreground mt-2">{selectedFile.name}</span>
+            <span className="block text-xs text-muted-foreground">{t('qrCode:clickToChange')}</span>
+          </div>
+        ) : (
+          <>
+            <Image
+              data-testid="ImageIcon"
+              className="w-12 h-12 text-muted-foreground mx-auto mb-2"
+            />
+            <span className="block text-sm text-muted-foreground mb-1">
+              {t('qrCode:clickToUpload')}
+            </span>
+            <span className="block text-xs text-muted-foreground">
+              {t('qrCode:supportFormats')}
+            </span>
+          </>
+        )}
+      </Label>
+    </div>
+  );
+};
+
+export default ImageUploader;
@@ -2,7 +2,7 @@ import { useCallback, useEffect } from 'react';
 import { RefreshCw } from 'lucide-react';
 import { toast } from 'sonner';
 import TextInputArea from '@/components/TextInputArea';
-import ImageUploader from '@/components/ImageUploader';
+import ImageUploader from './ImageUploader';
 import { useI18n } from '@/utils/chromeI18n';
 import { useQrCodeContext } from '../contexts/QrCodeContext';
 import { Button } from '@/components/ui/button';
@@ -0,0 +1,84 @@
+import React from 'react';
+import { Copy, Download } from 'lucide-react';
+import { useI18n } from '@/utils/chromeI18n';
+import { cn } from '@/lib/utils';
+import { Button } from '@/components/ui/button';
+
+// 继承原生 HTML Div 属性，方便外部无缝扩充类名或监听事件
+interface QrCodePreviewProps extends React.HTMLAttributes<HTMLDivElement> {
+  /** 二维码 Data URL */
+  qrCodeDataUrl: string;
+  /** 下载回调 */
+  onDownload: () => void;
+  /** 复制回调 */
+  onCopy: () => void;
+  /** 自定义占位文本，用于空状态提示 */
+  placeholderText?: string;
+}
+
+const QrCodePreview = ({
+  qrCodeDataUrl,
+  onDownload,
+  onCopy,
+  placeholderText,
+  className,
+  ...props
+}: QrCodePreviewProps) => {
+  const { t } = useI18n('qrCode');
+
+  // 空状态下的虚线骨架屏
+  if (!qrCodeDataUrl) {
+    return (
+      <div
+        className={cn(
+          'flex flex-col justify-center items-center min-h-[200px] border border-dashed border-input rounded-xl p-4 bg-muted/40',
+          className,
+        )}
+        {...props}
+      >
+        <p className="text-sm text-muted-foreground text-center">
+          {placeholderText || t('qrCode:qrCodeWillShow')}
+        </p>
+      </div>
+    );
+  }
+
+  return (
+    <div
+      className={cn(
+        'flex flex-col justify-center items-center border border-input rounded-xl p-4 bg-muted/40',
+        className,
+      )}
+      {...props}
+    >
+      <div className="flex flex-col items-center w-full max-w-xs">
+        {/*
+          二维码容器适配：
+          在暗黑模式下，纯黑白的二维码如果直接暴露在暗色背景下，会导致手机摄像头极难识别。
+          通过裹一层 bg-white 和 p-2，确保黑白对比度绝对安全，同时加入 shadow 增强卡片感。
+        */}
+        <div className="p-2 bg-white rounded-lg shadow-sm border border-border/40">
+          <img
+            src={qrCodeDataUrl}
+            alt="QR Code Preview"
+            className="w-48 h-48 max-w-full object-contain block animate-in fade-in duration-300"
+          />
+        </div>
+
+        <div className="flex w-full gap-2 mt-3">
+          <Button variant="outline" size="sm" onClick={onDownload} className="flex-1 h-8">
+            <Download className="w-3.5 h-3.5 text-muted-foreground" />
+            <span className="truncate text-xs">{t('qrCode:downloadButton')}</span>
+          </Button>
+
+          <Button variant="default" size="sm" onClick={onCopy} className="flex-1 h-8">
+            <Copy className="w-3.5 h-3.5" />
+            <span className="truncate text-xs">{t('qrCode:copyQrButton')}</span>
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default QrCodePreview;
@@ -39,20 +39,17 @@ export function StorageCleanerConfirm({
          'w-[90%] max-w-[340px] p-6 gap-0 rounded-2xl overflow-hidden shadow-xl border border-border bg-card text-card-foreground',
        )}
      >
-        {/* 头部标题区域 */}
        <DialogHeader className="pt-1">
          <DialogTitle className="text-center text-lg font-bold tracking-tight text-foreground">
            {t('storageCleaner:confirmTitle')}
          </DialogTitle>
        </DialogHeader>

-        {/* 内容主体：限制最大宽度，防止内部元素在大分辨率下被横向拉得太松散 */}
        <div className="text-center py-4 flex flex-col items-center w-full max-w-[280px] mx-auto">
          <DialogDescription className="mb-4 text-xs font-medium text-muted-foreground/90 leading-relaxed">
            {t('storageCleaner:confirmDesc')}
          </DialogDescription>

-          {/* 待清理项目徽章群 */}
          <div className="flex flex-wrap gap-1.5 justify-center mb-5 w-full">
            {selectedOptions.map((label) => (
              <Badge
@@ -65,7 +62,6 @@ export function StorageCleanerConfirm({
            ))}
          </div>

-          {/* 风险警告横幅 */}
          <div className="inline-flex items-center justify-center gap-1.5 px-3.5 py-2 rounded-lg bg-destructive/5 border border-dashed border-destructive/20 w-full max-w-[240px]">
            <AlertTriangle className="h-3.5 w-3.5 text-destructive shrink-0" />
            <span className="text-[11px] font-bold text-destructive leading-none tracking-tight">