🎉 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/tests/setup.js

@@ -0,0 +1,27 @@
+/**
+ * Jest 测试设置
+ */
+
+// 增加测试超时时间
+jest.setTimeout(30000)
+
+// 全局清理
+afterAll(async () => {
+  // 关闭所有数据库连接
+  const mongoose = require('mongoose')
+  if (mongoose.connection.readyState !== 0) {
+    await mongoose.connection.close()
+  }
+})
+
+// 抑制控制台日志（测试时）
+if (process.env.SUPPRESS_LOGS) {
+  global.console = {
+    ...console,
+    log: jest.fn(),
+    debug: jest.fn(),
+    info: jest.fn(),
+    warn: jest.fn(),
+    error: jest.fn()
+  }
+}