updated app.py to allow attachments

agent.py

@@ -121,7 +121,7 @@ NEVER fake or simulate tool output yourself. If you are unable to make progreess
 
 ... (this Thought/Action/Observation cycle can repeat as needed) ...
 Thought: I now know the final answer
-Final Answer: YOUR FINAL ANSWER should be a number OR as few words as possible OR a comma separated list of numbers and/or strings. If you are asked for a number, don't use comma to write your number neither use units such as $ or percent sign unless specified otherwise. If you are asked for a string, don't use articles, neither abbreviations (e.g. for cities), and write the digits in plain text unless specified otherwise. If you are asked for a comma separated list, apply the above rules depending of whether the element to be put in the list is a number or a string. Use proper punctuation and grammar.
+Final Answer: YOUR FINAL ANSWER should be a number OR as few words as possible OR a comma separated list of numbers and/or strings. If you are asked for a number, don't use comma to write your number neither use units such as $ or percent sign unless specified otherwise. If you are asked for a string, don't use articles, neither abbreviations (e.g. for cities), and write the digits in plain text unless specified otherwise. If you are asked for a comma separated list, apply the above rules depending of whether the element to be put in the list is a number or a string. For one word answers, start with the word with a capital letter.
 Make sure to follow any formatting instructions given by the user.
 Now begin! Reminder to ALWAYS use the exact characters `Final Answer:` when you provide a definitive answer."""