Update app.py

app.py

@@ -12,6 +12,17 @@ import openpyxl
 import csv
 import base64
 
+# Supported file types and their handlers - Define this at the top level
+FILE_TYPES = {
+    "md": "📝 Markdown",
+    "txt": "📄 Text",
+    "json": "🔧 JSON",
+    "csv": "📊 CSV",
+    "xlsx": "📗 Excel",
+    "yaml": "⚙️ YAML",
+    "xml": "🔗 XML"
+}
+
 # Enhanced state initialization
 if 'file_data' not in st.session_state:
     st.session_state.file_data = {}