feat: 修复测试套件问题并添加Woodpecker CI配置

- 修复API测试认证问题：创建全局认证设置，更新Playwright配置
- 优化回归测试稳定性：增加超时时间到15秒，修复定位器
- 创建Woodpecker CI工作流：CI、部署和质量门禁配置
- 添加Jest配置和测试脚本
- 移除登录页面的默认账号密码显示（安全问题修复）

src/lib/color-contrast.ts

@@ -20,11 +20,11 @@ function hexToRgb(hex: string): ColorRGB {
 
 function getLuminance(rgb: ColorRGB): number {
   const { r, g, b } = rgb;
-  const a = [r, g, b].map(v => {
-    v /= 255;
-    return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);
+  const values = [r, g, b].map(v => {
+    const normalized = v / 255;
+    return normalized <= 0.03928 ? normalized / 12.92 : Math.pow((normalized + 0.055) / 1.055, 2.4);
   });
-  return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
+  return values[0]! * 0.2126 + values[1]! * 0.7152 + values[2]! * 0.0722;
 }
 
 export function calculateContrastRatio(foreground: string, background: string): number {
@@ -43,21 +43,18 @@ export function calculateContrastRatio(foreground: string, background: string):
 export function meetsWCAGStandard(
   foreground: string,
   background: string,
-  level: 'AA' | 'AAA',
-  textSize: 'normal' | 'large'
+  level: 'AA' | 'AAA' = 'AA',
+  textSize: 'normal' | 'large' = 'normal'
 ): ContrastResult {
   const ratio = calculateContrastRatio(foreground, background);
   
-  let requiredRatio: number;
-  if (level === 'AA') {
-    requiredRatio = textSize === 'normal' ? 4.5 : 3;
-  } else {
-    requiredRatio = textSize === 'normal' ? 7 : 4.5;
-  }
+  const requiredRatio = level === 'AAA'
+    ? (textSize === 'large' ? 4.5 : 7)
+    : (textSize === 'large' ? 3 : 4.5);
   
   return {
     passes: ratio >= requiredRatio,
     ratio,
-    requiredRatio
+    requiredRatio,
   };
 }