diff --git a/src/entrypoints/__tests__/background.test.ts b/src/entrypoints/__tests__/background.test.ts
index 21d5d32..7029ba1 100644
--- a/src/entrypoints/__tests__/background.test.ts
+++ b/src/entrypoints/__tests__/background.test.ts
@@ -36,7 +36,7 @@ describe('background 菜单注册与分流', () => {
       expect(chrome.contextMenus.create).toHaveBeenCalledWith(
         expect.objectContaining({
           id: 'jwt',
-          title: '🔑 解析 JWT',
+          title: '解析 JWT',
           parentId: 'testing-tools-parent',
         }),
       );
@@ -48,7 +48,7 @@ describe('background 菜单注册与分流', () => {
       expect(chrome.contextMenus.create).toHaveBeenCalledWith(
         expect.objectContaining({
           id: 'qrCode-page',
-          title: '🔗 网页链接转二维码',
+          title: '网页链接转二维码',
           contexts: ['page'],
         }),
       );
diff --git a/src/pages/Base64Converter/components/DecodeResultPaper.tsx b/src/pages/Base64Converter/components/DecodeResultPaper.tsx
index c3987e0..5d9657c 100644
--- a/src/pages/Base64Converter/components/DecodeResultPaper.tsx
+++ b/src/pages/Base64Converter/components/DecodeResultPaper.tsx
@@ -10,6 +10,7 @@
 import { Download } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
 import { formatBytes } from '@/utils/format';
 import { useI18n } from '@/utils/chromeI18n';
 
@@ -61,9 +62,9 @@ export default function DecodeResultPaper({
 
       {/* 文件名输入 */}
       <div className="mb-3">
-        <label className="block text-xs font-medium text-muted-foreground mb-1">
+        <Label className="block text-xs font-medium text-muted-foreground mb-1">
           {t('decodedFileName')}
-        </label>
+        </Label>
         <Input value={fileName} onChange={(e) => onFileNameChange(e.target.value)} />
       </div>
 
diff --git a/src/pages/JsonTools/__tests__/index.test.tsx b/src/pages/JsonTools/__tests__/index.test.tsx
index 78ef06b..73e98ab 100644
--- a/src/pages/JsonTools/__tests__/index.test.tsx
+++ b/src/pages/JsonTools/__tests__/index.test.tsx
@@ -3,9 +3,9 @@ import { describe, it, expect } from 'vitest';
 import Index from '../index';
 
 describe('JsonTools 页面', () => {
-  it('应该渲染页面标题', () => {
+  it('应该渲染模式切换按钮', () => {
     render(<Index />);
-    // 基本渲染测试
-    expect(screen.getByRole('button')).toBeInTheDocument();
+    // 基本渲染测试：页面含多个模式切换按钮，应至少渲染一个
+    expect(screen.getAllByRole('button').length).toBeGreaterThan(0);
   });
 });
diff --git a/src/pages/QrCode/__tests__/index.test.tsx b/src/pages/QrCode/__tests__/index.test.tsx
index dc415bb..00cefed 100644
--- a/src/pages/QrCode/__tests__/index.test.tsx
+++ b/src/pages/QrCode/__tests__/index.test.tsx
@@ -26,11 +26,11 @@ vi.mock('@/config/features', async (importOriginal) => {
   };
 });
 
-vi.mock('@/components/QrCodePreview', () => ({
+vi.mock('../components/QrCodePreview', () => ({
   default: () => <div data-testid="qr-code-preview">QrCodePreview</div>,
 }));
 
-vi.mock('@/components/ImageUploader', () => ({
+vi.mock('../components/ImageUploader', () => ({
   default: () => <div data-testid="image-uploader">ImageUploader</div>,
 }));
 
diff --git a/src/pages/QrCode/components/ImageUploader.tsx b/src/pages/QrCode/components/ImageUploader.tsx
index fb801b1..1810834 100644
--- a/src/pages/QrCode/components/ImageUploader.tsx
+++ b/src/pages/QrCode/components/ImageUploader.tsx
@@ -113,7 +113,7 @@ const ImageUploader = ({
           ? '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'
+            : 'border-input bg-muted hover:border-green-600 hover:bg-green-500/10'
       }`}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
diff --git a/src/pages/StorageCleaner/__tests__/index.test.tsx b/src/pages/StorageCleaner/__tests__/index.test.tsx
index b10e7e1..bf5f345 100644
--- a/src/pages/StorageCleaner/__tests__/index.test.tsx
+++ b/src/pages/StorageCleaner/__tests__/index.test.tsx
@@ -25,7 +25,8 @@ vi.mock('@/utils/storageCleaner', () => ({
 
 describe('StorageCleaner 页面', () => {
   it('应该渲染初始化加载状态', () => {
+    // storageCleaner:initializing 的中文文案为「正在读取站点数据...」
     render(<Index />);
-    expect(screen.getByText(/initializing/i)).toBeInTheDocument();
+    expect(screen.getByText(/正在读取站点数据/)).toBeInTheDocument();
   });
 });
diff --git a/src/pages/StorageCleaner/components/StorageCleanerConfirm.tsx b/src/pages/StorageCleaner/components/StorageCleanerConfirm.tsx
index 88a1349..b3397cc 100644
--- a/src/pages/StorageCleaner/components/StorageCleanerConfirm.tsx
+++ b/src/pages/StorageCleaner/components/StorageCleanerConfirm.tsx
@@ -39,17 +39,20 @@ 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
@@ -62,6 +65,7 @@ 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">
diff --git a/src/pages/Timestamp/__tests__/index.test.tsx b/src/pages/Timestamp/__tests__/index.test.tsx
index c46df35..689b495 100644
--- a/src/pages/Timestamp/__tests__/index.test.tsx
+++ b/src/pages/Timestamp/__tests__/index.test.tsx
@@ -3,9 +3,9 @@ import { describe, it, expect } from 'vitest';
 import Index from '../index';
 
 describe('Timestamp 页面', () => {
-  it('应该渲染页面标题', () => {
+  it('应该渲染模式切换按钮', () => {
     render(<Index />);
-    // 基本渲染测试
-    expect(screen.getByRole('button')).toBeInTheDocument();
+    // 基本渲染测试：页面含多个模式切换按钮，应至少渲染一个
+    expect(screen.getAllByRole('button').length).toBeGreaterThan(0);
   });
 });
diff --git a/src/utils/__tests__/contextMenu.test.ts b/src/utils/__tests__/contextMenu.test.ts
index 071619b..752cee1 100644
--- a/src/utils/__tests__/contextMenu.test.ts
+++ b/src/utils/__tests__/contextMenu.test.ts
@@ -50,7 +50,7 @@ describe('contextMenu', () => {
       );
       expect(imageMenus).toHaveLength(1);
       expect(imageMenus[0].id).toBe('qrCode-image');
-      expect(imageMenus[0].title).toBe('🖼️ 解析图片二维码');
+      expect(imageMenus[0].title).toBe('解析图片二维码');
     });
   });
 
@@ -73,7 +73,7 @@ describe('contextMenu', () => {
 
       expect(chrome.contextMenus.create).toHaveBeenCalledWith({
         id: 'jwt',
-        title: '🔑 解析 JWT',
+        title: '解析 JWT',
         contexts: ['selection'],
         parentId: 'testing-tools-parent',
       });
diff --git a/src/utils/base64Converter.ts b/src/utils/base64Converter.ts
index 494f3b5..ce95bc5 100644
--- a/src/utils/base64Converter.ts
+++ b/src/utils/base64Converter.ts
@@ -2,8 +2,6 @@
  * Base64 转换器工具函数
  */
 
-import { formatBytes } from './format';
-
 /** 最大文件大小限制（10 MB） */
 export const MAX_FILE_SIZE = 10 * 1024 * 1024;
 
@@ -212,17 +210,6 @@ export function extractMimeTypeFromDataUri(dataUri: string): string {
   return match ? match[1] : 'application/octet-stream';
 }
 
-/**
- * 格式化文件大小显示
- *
- * @deprecated 直接使用 {@link formatBytes} 代替
- * @param bytes 字节数
- * @returns 格式化后的字符串
- */
-export function formatFileSize(bytes: number): string {
-  return formatBytes(bytes);
-}
-
 /**
  * Base64 解码为二进制后的产物
  */
diff --git a/vitest.setup.ts b/vitest.setup.ts
index 7aa20ec..efd1d23 100644
--- a/vitest.setup.ts
+++ b/vitest.setup.ts
@@ -125,6 +125,20 @@ const webExtensionMock = {
     sendMessage: vi.fn().mockResolvedValue(undefined),
     create: vi.fn().mockResolvedValue({}),
     reload: vi.fn().mockResolvedValue(undefined),
+    onActivated: {
+      addListener: vi.fn(),
+      removeListener: vi.fn(),
+    },
+    onUpdated: {
+      addListener: vi.fn(),
+      removeListener: vi.fn(),
+    },
+  },
+  windows: {
+    onFocusChanged: {
+      addListener: vi.fn(),
+      removeListener: vi.fn(),
+    },
   },
   runtime: {
     id: 'test-extension-id',