Feature/smart pdf notes export

[KolaSailaja]

📌 Description

This pull request implements the Smart PDF & Notes Export feature for EduPilot, allowing users to export AI-generated study content in multiple formats for offline learning, revision, and sharing.

✨ Features Added

• 📄 Export AI Tutor conversations
• 📝 Export study notes
• 🃏 Export flashcard sets
• 📅 Export study plans
• 📚 Export combined study sessions
• 📥 Support for PDF, Markdown (.md), and DOCX (.docx) formats
• 🎨 Clean, structured document formatting with headings and timestamps
• 📱 Responsive export interface
• ⚡ Loading states and user-friendly notifications
• 🔒 Secure export for authenticated users only

🛠️ Technical Changes

• Added export API routes
• Implemented reusable document export utilities
• Added export UI components
• Integrated export functionality into supported study modules
• Added validation and error handling
• Reused existing authentication and project architecture

✅ Testing

• Export AI Tutor conversations
• Export study notes
• Export flashcards
• Export study plans
• Export combined study sessions
• Generate PDF documents
• Generate Markdown documents
• Generate DOCX documents
• Verify authenticated access
• Verify responsive UI

Related Issue

Fixes #81

[vercel]

@KolaSailaja is attempting to deploy a commit to the vishwamistrylearning-1037's projects Team on Vercel.

A member of the Team first needs to authorize it.

[MistryVishwa]

@KolaSailaja Please resolve the branch conflicts.

[MistryVishwa]

@KolaSailaja Please resolve the branch conflicts.