diff --git a/tests/unit/helpers.test.js b/tests/unit/helpers.test.js
index 793a519..7fa2673 100644
--- a/tests/unit/helpers.test.js
+++ b/tests/unit/helpers.test.js
@@ -7,7 +7,7 @@
  * and prevent regressions.
  */
 
-import { strict as assert } from 'assert';
+import { strict as assert } from "assert";
 
 /**
  * Helper function to generate safe filename
@@ -15,9 +15,9 @@ import { strict as assert } from 'assert';
  */
 function generateSafeFilename(name) {
   return name
-    .replace(/[<>:"/\\|?*]/g, '_')
-    .replace(/\s+/g, '_')
-    .replace(/\.+$/g, '')
+    .replace(/[<>:"/\\|?*]/g, "_")
+    .replace(/\s+/g, "_")
+    .replace(/\.+$/g, "")
     .slice(0, 255);
 }
 
@@ -35,50 +35,70 @@ function getSafeAppName(name) {
 export function testGetSafeAppName() {
   const tests = [
     // Basic cases
-    { input: 'MyApp', expected: 'myapp', description: 'Simple name' },
-    { input: 'My App', expected: 'my_app', description: 'Name with space' },
-    { input: 'my-app', expected: 'my-app', description: 'Name with hyphen' },
+    { input: "MyApp", expected: "myapp", description: "Simple name" },
+    { input: "My App", expected: "my_app", description: "Name with space" },
+    { input: "my-app", expected: "my-app", description: "Name with hyphen" },
 
     // Chinese characters
-    { input: '我的应用', expected: '我的应用', description: 'Chinese name' },
-    { input: '我的 App', expected: '我的_app', description: 'Mixed Chinese and English' },
+    { input: "我的应用", expected: "我的应用", description: "Chinese name" },
+    {
+      input: "我的 App",
+      expected: "我的_app",
+      description: "Mixed Chinese and English",
+    },
 
     // Special characters
-    { input: 'App@2024', expected: 'app@2024', description: 'Special character @ (preserved)' },
-    { input: 'My/App', expected: 'my_app', description: 'Forward slash' },
-    { input: 'My\\App', expected: 'my_app', description: 'Backslash' },
-    { input: 'App:Name', expected: 'app_name', description: 'Colon' },
-    { input: 'App*Name', expected: 'app_name', description: 'Asterisk' },
-    { input: 'App?Name', expected: 'app_name', description: 'Question mark' },
-    { input: 'App"Name', expected: 'app_name', description: 'Double quote' },
-    { input: 'App<Name>', expected: 'app_name_', description: 'Angle brackets' },
-    { input: 'App|Name', expected: 'app_name', description: 'Pipe' },
+    {
+      input: "App@2024",
+      expected: "app@2024",
+      description: "Special character @ (preserved)",
+    },
+    { input: "My/App", expected: "my_app", description: "Forward slash" },
+    { input: "My\\App", expected: "my_app", description: "Backslash" },
+    { input: "App:Name", expected: "app_name", description: "Colon" },
+    { input: "App*Name", expected: "app_name", description: "Asterisk" },
+    { input: "App?Name", expected: "app_name", description: "Question mark" },
+    { input: 'App"Name', expected: "app_name", description: "Double quote" },
+    {
+      input: "App<Name>",
+      expected: "app_name_",
+      description: "Angle brackets",
+    },
+    { input: "App|Name", expected: "app_name", description: "Pipe" },
 
     // Edge cases
-    { input: 'APP', expected: 'app', description: 'All uppercase' },
-    { input: 'a', expected: 'a', description: 'Single character' },
-    { input: '123', expected: '123', description: 'Numbers only' },
-    { input: '  App  ', expected: '_app_', description: 'Leading/trailing spaces (collapsed)' },
-    { input: 'App...', expected: 'app', description: 'Trailing dots' },
+    { input: "APP", expected: "app", description: "All uppercase" },
+    { input: "a", expected: "a", description: "Single character" },
+    { input: "123", expected: "123", description: "Numbers only" },
+    {
+      input: "  App  ",
+      expected: "_app_",
+      description: "Leading/trailing spaces (collapsed)",
+    },
+    { input: "App...", expected: "app", description: "Trailing dots" },
 
     // Long names
     {
-      input: 'A'.repeat(300),
-      expected: 'a'.repeat(255),
-      description: 'Very long name (should truncate to 255)',
+      input: "A".repeat(300),
+      expected: "a".repeat(255),
+      description: "Very long name (should truncate to 255)",
     },
   ];
 
   let passed = 0;
   let failed = 0;
 
-  console.log('\n🧪 Testing getSafeAppName()');
-  console.log('─'.repeat(50));
+  console.log("\n🧪 Testing getSafeAppName()");
+  console.log("─".repeat(50));
 
   tests.forEach((test, index) => {
     try {
       const result = getSafeAppName(test.input);
-      assert.equal(result, test.expected, `Expected "${test.expected}", got "${result}"`);
+      assert.equal(
+        result,
+        test.expected,
+        `Expected "${test.expected}", got "${result}"`,
+      );
       console.log(`  ✓ Test ${index + 1}: ${test.description}`);
       passed++;
     } catch (error) {
@@ -90,7 +110,7 @@ export function testGetSafeAppName() {
     }
   });
 
-  console.log('─'.repeat(50));
+  console.log("─".repeat(50));
   console.log(`Results: ${passed} passed, ${failed} failed\n`);
 
   return failed === 0;
@@ -100,44 +120,44 @@ export function testGetSafeAppName() {
  * Test suite for download error notification (browser environment simulation)
  */
 export function testDownloadErrorNotification() {
-  console.log('\n🧪 Testing showDownloadError() Logic');
-  console.log('─'.repeat(50));
+  console.log("\n🧪 Testing showDownloadError() Logic");
+  console.log("─".repeat(50));
 
   const tests = [
     {
-      name: 'Chinese language detection',
-      language: 'zh-CN',
-      filename: 'test.pdf',
-      expectedTitle: '下载错误',
-      expectedBody: '下载失败: test.pdf',
+      name: "Chinese language detection",
+      language: "zh-CN",
+      filename: "test.pdf",
+      expectedTitle: "下载错误",
+      expectedBody: "下载失败: test.pdf",
     },
     {
-      name: 'English language detection',
-      language: 'en-US',
-      filename: 'document.docx',
-      expectedTitle: 'Download Error',
-      expectedBody: 'Download failed: document.docx',
+      name: "English language detection",
+      language: "en-US",
+      filename: "document.docx",
+      expectedTitle: "Download Error",
+      expectedBody: "Download failed: document.docx",
     },
     {
-      name: 'Traditional Chinese',
-      language: 'zh-TW',
-      filename: 'file.zip',
-      expectedTitle: '下载错误',
-      expectedBody: '下载失败: file.zip',
+      name: "Traditional Chinese",
+      language: "zh-TW",
+      filename: "file.zip",
+      expectedTitle: "下载错误",
+      expectedBody: "下载失败: file.zip",
     },
     {
-      name: 'Hong Kong Chinese',
-      language: 'zh-HK',
-      filename: 'image.png',
-      expectedTitle: '下载错误',
-      expectedBody: '下载失败: image.png',
+      name: "Hong Kong Chinese",
+      language: "zh-HK",
+      filename: "image.png",
+      expectedTitle: "下载错误",
+      expectedBody: "下载失败: image.png",
     },
     {
-      name: 'Special characters in filename',
-      language: 'en-US',
-      filename: 'my file (1).pdf',
-      expectedTitle: 'Download Error',
-      expectedBody: 'Download failed: my file (1).pdf',
+      name: "Special characters in filename",
+      language: "en-US",
+      filename: "my file (1).pdf",
+      expectedTitle: "Download Error",
+      expectedBody: "Download failed: my file (1).pdf",
     },
   ];
 
@@ -149,18 +169,22 @@ export function testDownloadErrorNotification() {
       // Simulate language detection
       const isChineseLanguage = (lang) =>
         lang &&
-        (lang.startsWith('zh') ||
-          lang.includes('CN') ||
-          lang.includes('TW') ||
-          lang.includes('HK'));
+        (lang.startsWith("zh") ||
+          lang.includes("CN") ||
+          lang.includes("TW") ||
+          lang.includes("HK"));
 
       const isChinese = isChineseLanguage(test.language);
-      const title = isChinese ? '下载错误' : 'Download Error';
+      const title = isChinese ? "下载错误" : "Download Error";
       const body = isChinese
         ? `下载失败: ${test.filename}`
         : `Download failed: ${test.filename}`;
 
-      assert.equal(title, test.expectedTitle, `Title mismatch for ${test.name}`);
+      assert.equal(
+        title,
+        test.expectedTitle,
+        `Title mismatch for ${test.name}`,
+      );
       assert.equal(body, test.expectedBody, `Body mismatch for ${test.name}`);
 
       console.log(`  ✓ Test ${index + 1}: ${test.name}`);
@@ -175,7 +199,7 @@ export function testDownloadErrorNotification() {
     }
   });
 
-  console.log('─'.repeat(50));
+  console.log("─".repeat(50));
   console.log(`Results: ${passed} passed, ${failed} failed\n`);
 
   return failed === 0;
@@ -185,20 +209,20 @@ export function testDownloadErrorNotification() {
  * Run all tests
  */
 export async function runHelperTests() {
-  console.log('\n📦 Helper Functions Unit Tests');
-  console.log('='.repeat(50));
+  console.log("\n📦 Helper Functions Unit Tests");
+  console.log("=".repeat(50));
 
   const results = [];
 
   // Test getSafeAppName
   results.push({
-    name: 'getSafeAppName()',
+    name: "getSafeAppName()",
     passed: testGetSafeAppName(),
   });
 
   // Test download error notification
   results.push({
-    name: 'showDownloadError() Logic',
+    name: "showDownloadError() Logic",
     passed: testDownloadErrorNotification(),
   });
 
@@ -207,13 +231,13 @@ export async function runHelperTests() {
   const passedCount = results.filter((r) => r.passed).length;
   const totalCount = results.length;
 
-  console.log('\n📊 Helper Tests Summary');
-  console.log('='.repeat(50));
+  console.log("\n📊 Helper Tests Summary");
+  console.log("=".repeat(50));
   results.forEach((result) => {
-    const icon = result.passed ? '✅' : '❌';
+    const icon = result.passed ? "✅" : "❌";
     console.log(`${icon} ${result.name}`);
   });
-  console.log('='.repeat(50));
+  console.log("=".repeat(50));
   console.log(`Total: ${passedCount}/${totalCount} test suites passed\n`);
 
   return allPassed;
@@ -226,7 +250,7 @@ if (import.meta.url === `file://${process.argv[1]}`) {
       process.exit(success ? 0 : 1);
     })
     .catch((error) => {
-      console.error('Test execution failed:', error);
+      console.error("Test execution failed:", error);
       process.exit(1);
     });
 }