feat: 增加测试覆盖率并优化代码质量

test: 添加单元测试和端到端测试
refactor: 重构登录页面和上传模块
ci: 更新测试覆盖率阈值至42%
build: 添加测试相关依赖
docs: 更新测试文档
style: 修复代码格式问题

src/lib/analytics.ts

@@ -24,7 +24,7 @@ export const event = (action: string, category: string, label?: string, value?:
   }
 };
 
-export const trackContactForm = (formData: Record<string, string>) => {
+export const trackContactForm = (_formData: Record<string, string>) => {
   event('submit', 'contact_form', 'contact_form_submission');
 };
 
@@ -32,6 +32,6 @@ export const trackButtonClick = (buttonName: string, location: string) => {
   event('click', 'button', `${location}_${buttonName}`);
 };
 
-export const trackPageView = (pageTitle: string, pagePath: string) => {
+export const trackPageView = (pageTitle: string, _pagePath: string) => {
   event('page_view', 'navigation', pageTitle);
 };

src/lib/auth/session.ts

@@ -1,5 +1,3 @@
-import { describe, it, expect } from '@jest/globals';
-
 export interface SessionData {
   userId: string;
   role?: string;

src/lib/monitoring.ts

@@ -32,7 +32,7 @@ export class PerformanceMonitor {
     
     const sorted = [...values].sort((a, b) => a - b);
     const index = Math.ceil((percentile / 100) * sorted.length) - 1;
-    return sorted[Math.max(0, index)];
+    return sorted[Math.max(0, index)] ?? 0;
   }
 
   getCount(name: string): number {

src/lib/upload.test.ts

@@ -1,5 +1,4 @@
 import { describe, it, expect, jest, beforeEach, afterEach } from '@jest/globals';
-import path from 'path';
 import { writeFile, mkdir, unlink, stat } from 'fs/promises';
 import { existsSync } from 'fs';
 
@@ -215,9 +214,9 @@ describe('Upload Module', () => {
         name: 'test.jpg',
         size: 1024,
         type: 'image/jpeg',
-        arrayBuffer: jest.fn().mockResolvedValue(new ArrayBuffer(1024)),
+        arrayBuffer: jest.fn().mockResolvedValue(new ArrayBuffer(1024)) as any,
         ...overrides,
-      } as any;
+      } as File;
     };
 
     it('should upload a valid image file successfully', async () => {
@@ -225,7 +224,7 @@ describe('Upload Module', () => {
       
       const validJpegBuffer = Buffer.from([0xFF, 0xD8, 0xFF, 0x00, 0x00]);
       const mockFile = createMockFile({
-        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer),
+        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer) as any as any,
       });
 
       mockedExistsSync.mockReturnValue(true);
@@ -280,7 +279,7 @@ describe('Upload Module', () => {
       const fakeJpegBuffer = Buffer.from([0x00, 0x00, 0x00, 0x00]);
       const fakeFile = createMockFile({
         type: 'image/jpeg',
-        arrayBuffer: jest.fn().mockResolvedValue(fakeJpegBuffer),
+        arrayBuffer: jest.fn().mockResolvedValue(fakeJpegBuffer) as any as any,
       });
 
       await expect(uploadFile(fakeFile, { type: 'image' }))
@@ -292,7 +291,7 @@ describe('Upload Module', () => {
       
       const validJpegBuffer = Buffer.from([0xFF, 0xD8, 0xFF, 0x00, 0x00]);
       const mockFile = createMockFile({
-        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer),
+        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer) as any as any,
       });
 
       mockedExistsSync.mockReturnValue(false);
@@ -309,7 +308,7 @@ describe('Upload Module', () => {
       
       const validJpegBuffer = Buffer.from([0xFF, 0xD8, 0xFF, 0x00, 0x00]);
       const mockFile = createMockFile({
-        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer),
+        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer) as any as any,
       });
 
       mockedExistsSync.mockReturnValue(true);
@@ -326,7 +325,7 @@ describe('Upload Module', () => {
       const validJpegBuffer = Buffer.from([0xFF, 0xD8, 0xFF, 0x00, 0x00]);
       const mockFile = createMockFile({
         name: 'Test<>File.JPG',
-        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer),
+        arrayBuffer: jest.fn().mockResolvedValue(validJpegBuffer) as any as any,
       });
 
       mockedExistsSync.mockReturnValue(true);