refactor: Handle edge case in main.py for current_file parameter

The main.py file has been refactored to handle an edge case where the current_file parameter is empty. This change ensures that the code correctly checks for the presence of the current_file parameter before performing further actions.

src/ui/main.py

@@ -2142,7 +2142,7 @@ def logs():
 
     current_file = secure_filename(request.args.get("file", ""))
 
-    if current_file not in files:
+    if current_file and current_file not in files:
         return Response("No such file", 404)
 
     if isabs(current_file) or ".." in current_file: