Export Chat History and Attached Files

Allow users to download and preserve a record of their chat history, including text messages, images, or other shared files. This could be helpful for data backup or archival purposes.

Goals:
• Simplify the extraction of conversation data into a user-friendly format (e.g., PDF, JSON, or a zipped folder).
• Include an option to export attached media/files, either embedded or in a separate directory.

Possible Approach:
• Aggregate messages from the local storage.
• Generate a structured export file (e.g., JSON) or a PDF with text and embedded media links.
• Provide a clear UI option for the export and store the exported file securely in local storage.