Build an AI-Powered Document Enhancement + Template Export Web Tool

need a web-based application that allows users to input text or upload a document, enhances/improves the content using AI, and then inserts the enhanced content into pre-designed templates which can be exported as PDF and DOCX.

The workflow should be:
1. User Input:
• Multi-step form OR file upload
• Capture structured fields (names, sections, details, etc.)
2. AI Processing Module:
• Use OpenAI API (or similar) to rewrite, improve, and structure content
• Different enhancement modes depending on category selected by the user
• Must return clean, formatted text sections
3. Template Engine:
• 3–5 HTML/CSS templates
• Merge enhanced content into selected template
• Live preview
• Export to PDF and DOCX
4. Currency-Aware Pricing:
• Show prices in INR for Indian users
• USD for international users
• Integrate Stripe + Razorpay
5. User Dashboard:
• Login / Signup
• History of generated documents
• Ability to re-download previous exports
6. Admin Features:
• View users
• Manage templates
• Manage categories (sectors)
• Basic analytics

Tech preferences (not mandatory but preferred):
• Frontend: Next.js / React / Tailwind
• Backend: Node.js or Python (FastAPI)
• Storage: Supabase / Firebase / AWS S3
• PDF Export: Puppeteer / Playwright or similar
• AI: OpenAI API
• Hosting: Vercel / Render / Railway

Deliverables:
• Fully functional web application
• Clean UI (Figma designs will be provided if needed)
• All source code
• Deployment setup
• Basic documentation

Please include in your proposal:
• Similar projects you’ve built
• Your tech stack
• Estimated timeline and cost
• Any questions you have about the workflow

This is a content enhancement + template export tool — not a complex enterprise system, but it must be polished and reliable.