Update app.py

app.py

@@ -453,8 +453,11 @@ def FileSidebar():
             if st.button("📂", key=f"open_{file}"):
                 with open(file, "rb") as f:
                     content = f.read()
-                if ext in [".md", ".pdf"]:
+                if ext == ".md":
                     st.text_area(f"Editing {file}", value=content.decode("utf-8"), height=300, key=f"edit_{file}")
+                elif ext == ".pdf":
+                    st.download_button("Download PDF to Edit", content, file, "application/pdf")
+                    st.write("PDF editing not supported in-app; download to edit externally.")
                 elif ext in [".png", ".jpg", ".jpeg"]:
                     st.image(content, use_column_width=True, caption=f"Viewing {file}")
                 elif ext in [".wav", ".mp3"]: