Update requirements.txt

requirements.txt

@@ -1,14 +1,31 @@
+# Core web framework
 fastapi
 uvicorn[standard]
+
+# File upload handling
 python-multipart
 aiofiles
+
+# Templating
 jinja2
+
+# Document processing
 python-docx
 openpyxl
 python-pptx
-PyMuPDF
+PyMuPDF  # Note: real package name is PyMuPDF (not fitz)
+pdfplumber  # Add for better PDF text extraction
+
+# Image processing
 Pillow
-transformers
-torch
+
+# Progress bars (used by transformers)
 tqdm
-gradio
+
+# Gradio interface
+gradio==4.19.2
+
+# Transformers and model inference (CPU-friendly)
+transformers==4.36.2
+torch==2.1.2
+sentencepiece  # Needed for some tokenizer models like BART, T5, etc.