Update app.py

app.py

@@ -77,7 +77,7 @@ def view_pdf():
         print("⚙️ Using cached PDF (already processed).")
 
     # Render viewer and start at requested page/zoom
-    return render_template("viewer.html", start_page=page, start_zoom=zoom)
+    return render_template("gui.html", start_page=page, start_zoom=zoom)
 
 
 @app.route('/get-pdf')