test(e2e,unit): add navigation edge cases and component coverage

- Add missing-paths E2E spec for desktop/mobile navigation and contrast
- Add local Playwright config for dev server testing
- Expand unit tests for CMS data server, products, contact and UI components
- Adjust jest config for new test patterns

config/test/jest.config.js

@@ -17,32 +17,76 @@ module.exports = {
     '!src/**/*.stories.{ts,tsx}',
     '!src/**/__tests__/**',
   ],
-  // 覆盖率阈值采用渐进提升策略：初始值设低于当前实测值，每完成一个迭代任务后提升
-  // 当前实测值: global(~17% stmts/~12% branches), hooks(~18%/~5%), lib(~33%/~10%), ui(~16%/~21%)
+  // 覆盖率阈值采用渐进提升策略：基于 Phase 1-5 实测值设定目录级阈值，避免全局平均掩盖核心模块缺口
+  // 实测基准 (Phase 5): global(~33% stmts/~32% branches), hooks(~61%/~41%), lib(~45%/~43%),
+  // ui(~15%/~21%), layout(~59%/~48%), detail(~32%/~29%), sections(~31%/~35%), content(~29%/~5%),
+  // lib/cms(~67%/~83%), lib/constants(~94%/~81%)
   coverageThreshold: {
     global: {
-      branches: 10,
+      branches: 30,
+      functions: 25,
+      lines: 32,
+      statements: 30,
+    },
+    './src/hooks/': {
+      branches: 38,
+      functions: 60,
+      lines: 60,
+      statements: 60,
+    },
+    './src/lib/': {
+      branches: 40,
+      functions: 45,
+      lines: 42,
+      statements: 42,
+    },
+    './src/components/ui/': {
+      branches: 18,
       functions: 10,
       lines: 15,
       statements: 14,
     },
-    './src/hooks/': {
-      branches: 3,
-      functions: 15,
-      lines: 15,
-      statements: 14,
+    './src/components/layout/': {
+      branches: 45,
+      functions: 35,
+      lines: 60,
+      statements: 55,
     },
-    './src/lib/': {
-      branches: 8,
+    './src/components/detail/': {
+      branches: 25,
+      functions: 22,
+      lines: 30,
+      statements: 30,
+    },
+    './src/components/sections/': {
+      branches: 30,
       functions: 18,
-      lines: 28,
-      statements: 28,
+      lines: 30,
+      statements: 30,
     },
-    './src/components/ui/': {
-      branches: 16,
-      functions: 9,
-      lines: 14,
-      statements: 13,
+    './src/components/content/': {
+      branches: 4,
+      functions: 4,
+      lines: 25,
+      statements: 25,
+    },
+    './src/components/seo/': {
+      branches: 0,
+      functions: 20,
+      lines: 45,
+      statements: 45,
+    },
+    './src/lib/cms/': {
+      branches: 80,
+      functions: 75,
+      lines: 60,
+      statements: 65,
+    },
+    './src/lib/constants/': {
+      branches: 80,
+      functions: 55,
+      lines: 90,
+      statements: 90,
     },
   },
   coverageReporters: ['text', 'lcov', 'html', 'json'],