🎉 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/certs/apiclient_cert.pem

@@ -0,0 +1,25 @@
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+-----END CERTIFICATE-----