Fix packages.txt - use correct apt-get package names

packages.txt

@@ -1,6 +1,5 @@
 # System-level dependencies for Hugging Face Spaces
-# These packages will be installed using apt-get
-
-# For handling images and plots
-libgl1-mesa-glx
-libglib2.0-0
+# Minimal dependencies for Streamlit and data processing
+libsm6
+libxext6
+libxrender-dev