Revert fix downloads without results

app.py

@@ -217,25 +217,23 @@ def server(input, output, session: Session):
 
         return ui.div(ui_output)
 
-    @session.download()
+    @render.download()
     def download():
         results = analysis_results.get()
-        if not results:
-            return ui.div("No results yet. Upload images and click 'Analyze'.",
-                          class_="text-muted")
-        else:
-            df = pd.DataFrame([{
-                "Filename": r["filename"],
-                "Viable": r.get("viable", ""),
-                "Non-Viable": r.get("non-viable", ""),
-                "Empty": r.get("empty", ""),
-                "Total": r.get("total", "")
-            } for r in results])
-
-            # Create in-memory CSV file
-            with tempfile.NamedTemporaryFile(delete=False, suffix=".csv") as tmp:
-                df.to_csv(tmp.name, index=False)
-                return tmp.name
+        # if not results:
+        #     None
+        df = pd.DataFrame([{
+            "Filename": r["filename"],
+            "Viable": r.get("viable", ""),
+            "Non-Viable": r.get("non-viable", ""),
+            "Empty": r.get("empty", ""),
+            "Total": r.get("total", "")
+        } for r in results])
+
+        # Create in-memory CSV file
+        with tempfile.NamedTemporaryFile(delete=False, suffix=".csv") as tmp:
+            df.to_csv(tmp.name, index=False)
+            return tmp.name
 
 
 app = App(app_ui, server)