fix duplicate export function and sync imports between app.py and utils.py

app.py

@@ -18,7 +18,7 @@ from pathlib import Path
 # Import our shared utilities
 from utils import (
     get_theme, fetch_url_content, create_safe_filename,
-    export_conversation_to_markdown, process_file_upload,
+    export_conversation_to_text, process_file_upload,
     ConfigurationManager, get_model_choices, AVAILABLE_THEMES,
     extract_urls_from_text
 )

utils.py

@@ -143,40 +143,53 @@ def create_safe_filename(base_name: str, suffix: str = ".md", prefix: str = "",
     return f"{safe_name}{suffix}"
 
 
-def export_conversation_to_markdown(history: List[Dict[str, str]], 
-                                  config: Optional[Dict[str, Any]] = None) -> str:
-    """Export conversation history to markdown format"""
+def export_conversation_to_text(history: List[Dict[str, str]], 
+                               config: Optional[Dict[str, Any]] = None) -> str:
+    """Export conversation history to text with timestamps"""
     if not history:
         return "No conversation to export."
     
-    # Build header
-    markdown_content = f"""# Conversation Export
-Generated on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}
-"""
+    space_name = config.get('name', 'AI Assistant') if config else 'AI Assistant'
+    model_name = config.get('model', 'Unknown') if config else 'Unknown'
     
-    # Add configuration info if provided
-    if config:
-        markdown_content += f"""
-Assistant: {config.get('name', 'AI Assistant')}
-Model: {config.get('model', 'Unknown')}
+    text_content = f"""Conversation Export
+==================
+Generated on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}
+Space: {space_name}
+Model: {model_name}
+
+==================
+
 """
     
-    markdown_content += "\n---\n\n"
-    
-    # Process messages
-    message_pair_count = 0
+    message_count = 0
     for message in history:
         if isinstance(message, dict):
             role = message.get('role', 'unknown')
             content = message.get('content', '')
             
+            # Get timestamp from message or use current time as fallback
+            timestamp_str = message.get('timestamp', '')
+            if timestamp_str:
+                try:
+                    # Parse ISO format timestamp and format it nicely
+                    timestamp = datetime.fromisoformat(timestamp_str)
+                    formatted_timestamp = timestamp.strftime('%Y-%m-%d %H:%M:%S')
+                except:
+                    formatted_timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+            else:
+                formatted_timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+            
+            # Get message length
+            msg_length = message.get('length', len(content))
+            
             if role == 'user':
-                message_pair_count += 1
-                markdown_content += f"## User Message {message_pair_count}\n\n{content}\n\n"
+                message_count += 1
+                text_content += f"[{formatted_timestamp}] User Message {message_count} ({msg_length} chars):\n{content}\n\n"
             elif role == 'assistant':
-                markdown_content += f"## Assistant Response {message_pair_count}\n\n{content}\n\n---\n\n"
+                text_content += f"[{formatted_timestamp}] Assistant Response {message_count} ({msg_length} chars):\n{content}\n\n------------------\n\n"
     
-    return markdown_content
+    return text_content
 
 
 def process_file_upload(file_path: str, max_chars: int = 8000) -> str: