make protein id search matching case insensitive

ProtHGT_app.py

@@ -103,7 +103,14 @@ with st.sidebar:
         # Apply fuzzy search only if query length is >= 3
         filtered_proteins = []
         if len(search_query) >= 3:
-            filtered_proteins = [match[0] for match in process.extract(search_query, available_proteins, limit=50)]  # Show top 50 matches
+            # Case-insensitive search by converting query and proteins to lowercase
+            matches = process.extract(
+                search_query.lower(), 
+                {p: p.lower() for p in available_proteins}, 
+                limit=50,
+                score_cutoff=50  # Optional: only include matches above 50% similarity
+            )
+            filtered_proteins = [match[0] for match in matches]  # Show top 50 matches
 
         # Multi-select for filtered results
         selected_proteins = st.multiselect(
@@ -115,7 +122,7 @@ with st.sidebar:
 
         if selected_proteins:
             st.write(f"Selected {len(selected_proteins)} proteins")
-                
+                            
     else:
         uploaded_file = st.file_uploader(
             "Upload a text file with UniProt IDs (one per line, max 100)*",