Update app.py

app.py

@@ -15,7 +15,7 @@ import kmer_predict  # must be in repo root
 
 
 PERSIST_BASE = "/tmp/kmer_predict_runs"
-FASTA_EXTS = (".fa", ".fasta", ".fas", ".fna")
+FASTA_EXTS = (".fa", ".fasta", ".fas", ".fna", ".txt")
 
 
 def _zip_dir(folder: str, zip_path: str) -> None:
@@ -150,7 +150,7 @@ with gr.Blocks() as demo:
     unknown_uploads = gr.File(
         label="Unknown sequences (FASTA files or ZIP containing FASTA)",
         file_count="multiple",
-        file_types=[".fa", ".fasta", ".fas", ".fna", ".zip"],
+        file_types=[".fa", ".fasta", ".fas", ".fna", "txt", ".zip"],
     )
 
     kmer_zip = gr.File(