[Next] refactor: Simplify Next.js app - remove unnecessary dependencies

## GitHub Update **Repository:** [MKWcorp/CINTAI](https://github.com/MKWcorp/CINTAI) **Author:** MKWcorp **Date:** 11/9/2025, 7:47:25 AM **Commit:** [`0643339`](https://github.com/MKWcorp/CINTAI/commit/06433392cf8afc0c659dddb46d5e504117198ae7) ### Commit Message refactor: Simplify Next.js app - remove unnecessary dependencies Remove: - All database logic (pg) - handled by VPS backend - Google Cloud Storage - handled by VPS backend - Gemini AI - handled by VPS backend - Axios - use native fetch - Complex API routes (circlo/webhook, n8n, upload) - lib/ folder with backend logic Keep only: - Next.js, React, React-DOM - Simple /api/chat route that forwards to VPS - Chat UI interface Result: 385 packages (down from 468) App is now truly frontend-only, backend handles everything --- _This story was imported from historical commits._