🎉 feat: initialize 宇之然AI维度 project

- uni-app Vue3 frontend with dark glassmorphism theme
- 5 AI dimensions: Origin / Development / Current / Learning / Trend
- AI Chat system prompt updated from geometry to AI
- 23 AI knowledge articles initialized in DB
- Trend API + cron job for daily news
- Product pricing (Pro ¥19.9, VIP ¥39.9)
- Pinia stores + API utilities
- AGENTS.md documentation

backend/wdkj-server/jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  testEnvironment: 'node',
+  testMatch: ['**/tests/**/*.test.js'],
+  collectCoverageFrom: [
+    'src/**/*.js',
+    '!src/index.js'
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+  testTimeout: 30000,
+  setupFilesAfterEnv: ['<rootDir>/tests/setup.js'],
+  verbose: true
+}