Enhanced PDF Chat UI with Annotation, Search, and Comparison Features

[ajeetraina]

Enhanced PDF Chat UI

This pull request adds three major new features to the PDF chat functionality:

1. PDF Annotation and Highlighting

   • Interactive text highlighting with customizable colors
   • Annotation system for adding notes to specific text selections
   • Visual indicators for both highlights and annotations
   • Easy management (add/delete) of annotations and highlights

2. Search Functionality within PDF Documents

   • Full-text search within PDF documents
   • Visual highlighting of search results
   • Navigation between results with prev/next buttons
   • Result count and current position indicator

3. Multiple Document Comparison

   • Side-by-side document comparison
   • Selection of two documents for comparison
   • Synchronized page navigation
   • Visual identification of document differences

Implementation Details

• Created enhanced versions of the PDFChat and PDFUpload components
• Added CSS styling for the new UI elements
• Implemented document type extensions for annotations and highlights
• Added text extraction capabilities for search functionality

Dependencies

This enhancement requires adding these dependencies:

• react-pdf: For rendering PDF documents
• react-icons: For UI icons

Testing Instructions

1. Upload multiple PDF documents
2. Try highlighting text and adding annotations
3. Test the search functionality across multiple pages
4. Compare two documents side by side

Screenshots

Screenshots will be attached in a follow-up comment.