Issue 141: streamlit shows currency it formats as math formula issue fixed (#145)

Signed-off-by: RAWx18 <rawx18.dev@gmail.com>

Author: RAWx18

src/mvt/pages/admin_responses.py

@@ -4,7 +4,7 @@
 import json
 import shutil
 from menu import menu_with_redirect
-from utils import load_yaml_file_with_db_prompts
+from utils import load_yaml_file_with_db_prompts, escape_markdown
 from database import create_connection, get_all_responses_with_documents, migrate_text_file_to_database
 
 # Redirect to app.py if not logged in, otherwise show the navigation menu
@@ -299,7 +299,7 @@ def display_source_document(doc, index):
 
             # Answer
             st.markdown("**🤖 Answer:**")
-            st.markdown(answer)
+            st.markdown(escape_markdown(answer))
 
             # Source documents
             if context:

src/mvt/pages/chatbot.py

@@ -1,4 +1,4 @@
-from utils import load_yaml_file_with_db_prompts
+from utils import load_yaml_file_with_db_prompts, escape_markdown
 from main import get_ragchain
 import streamlit as st
 from menu import menu_with_redirect
@@ -81,7 +81,7 @@ def save_feedback(username, msg_idx, feedback_type, response_snippet, reason=Non
 # -------------------------------
 for idx, message in enumerate(user_chat):
     with st.chat_message(message["role"], avatar=logo_path if message["role"] == "assistant" else None):
-        st.write(message["content"])
+        st.markdown(escape_markdown(message["content"]))
         # Only show feedback for assistant messages that are not the initial greeting
         if message["role"] == "assistant" and not (idx == 0 and message["content"] == "How may I help you?"):
             feedback_key = f"feedback_{username}_{idx}"
@@ -147,7 +147,7 @@ def save_feedback(username, msg_idx, feedback_type, response_snippet, reason=Non
     save_message(username, "user", prompt)
 
     with st.chat_message("user"):
-        st.write(prompt)
+        st.markdown(escape_markdown(prompt))
 
     with st.chat_message("assistant", avatar=logo_path):
         with st.spinner("Thinking..."):
@@ -197,7 +197,7 @@ def save_feedback(username, msg_idx, feedback_type, response_snippet, reason=Non
 
             # Keep text file backup for now (can be removed later)
             print(response, file=open('responses.txt', 'a', encoding='utf-8'))
-            st.markdown(response["answer"])
+            st.markdown(escape_markdown(response["answer"]))
 
         reply_msg = {"role": "assistant", "content": response["answer"]}
         user_chat.append(reply_msg)

src/mvt/utils.py

@@ -302,4 +302,21 @@ def save_transcript(video_id, output_folder):
         print(f"Saved transcript in: {file_path}")
 
     except Exception as e:
-        print(f"Error reading transcript: {e}")
+        print(f"Error reading transcript: {e}")
+
+
+# Markdown escape function to prevent special characters from being interpreted as markdown
+MARKDOWN_ESCAPE_RE = re.compile(r'([\\`*_{}\[\]()#+\-!$])')
+
+def escape_markdown(text: str) -> str:
+    """
+    Escape special markdown characters to prevent them from being interpreted as markdown syntax.
+    This is particularly useful for currency symbols like $ that Streamlit interprets as math mode.
+    
+    Args:
+        text (str): The text to escape
+        
+    Returns:
+        str: The text with markdown special characters escaped
+    """
+    return MARKDOWN_ESCAPE_RE.sub(r'\\\1', text)