small improvements

app.py

@@ -13,12 +13,14 @@ def check_password(username, password):
 def func(file, number_of_pages, secret):
     if secret != os.environ["ACCESS"]:
         return "Wrong password, please try again"
-    text = client.predict(file, number_of_pages)
+    output = client.predict(file, number_of_pages)
+    if "Error" in output:
+        return output   
     # generate a random sequence of numbers
     # s = "".join([str(random.randint(0, 9)) for i in range(10)])
     # with open(f"{s}.tex", "w", encoding="utf-8") as f:
     #     f.write(text)
-    return text
+    return output
 
 def upload_file(file):
     return file.name
@@ -63,7 +65,7 @@ if __name__ == "__main__":
 
         number_of_pages = gr.Number(label="Number of pages")
         secret = gr.Textbox(label="Password", type="password")
-        output = gr.Textbox(label="Output")
+        output = gr.Textbox(label="Output", show_copy_button=True, interactive=False)
         greet_btn = gr.Button("Generate slides")
         greet_btn.click(fn=func, inputs=[upload_button, number_of_pages, secret], outputs=output, api_name="greet")