Update app.py

app.py

@@ -42,8 +42,14 @@ def list_files():
         
         df = pd.DataFrame(data)
         if not df.empty:
-            # Convert 'Last Modified' to datetime for accurate chronological sorting
-            df["Last Modified"] = pd.to_datetime(df["Last Modified"]).dt.tz_localize(None)
+            # Safely convert to datetime using errors='coerce' to turn "Unknown" into NaT (Not a Time)
+            dt_col = pd.to_datetime(df["Last Modified"], errors='coerce')
+            
+            # Remove timezone info for clean sorting/display
+            dt_col = dt_col.dt.tz_localize(None)
+            
+            # Convert back to a clean string format, replacing NaT back with "Unknown" for the UI
+            df["Last Modified"] = dt_col.dt.strftime('%Y-%m-%d %H:%M:%S').fillna("Unknown")
             
             # Default sort by File Name (alphabetical)
             df = df.sort_values(by="File Name", ascending=True)
@@ -79,7 +85,8 @@ def download_file(filename):
         return None
 
 # --- UI LAYOUT ---
-with gr.Blocks(theme=gr.themes.Soft(primary_hue="indigo")) as app:
+# Theme moved from here to the launch command at the bottom
+with gr.Blocks() as app:
     gr.Markdown("# 🗄️ AudioNovel Bucket Explorer")
     gr.Markdown("View, sort, and download your processed audio files. **Click the column headers below to sort by Name, Date, or Size.**")
     
@@ -113,4 +120,5 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="indigo")) as app:
     app.load(fn=list_files, inputs=[], outputs=[file_table, file_dropdown])
 
 if __name__ == "__main__":
-    app.launch()
+    # Theme is applied here now to avoid the Gradio 6.0 warning
+    app.launch(theme=gr.themes.Soft(primary_hue="indigo"))