Bug Fix: Prevent crash on missing session state during download

This patch release fixes a bug where the app would crash if a transcript or extracted text file was not present in the session state when attempting to display the download button.

🔧 Fixes:

• Avoids AttributeError by checking for missing session state keys (transcript_path, pdf_text_path, etc.)
• Ensures smoother user experience after app reload or on first file upload

No changes to core functionality or UI.

MyStudyMate MVP Release

🎉 Initial working version of MyStudyMate.

• Supports .mp3, .wav, and .pdf uploads
• Transcribes audio via Whisper
• Extracts text from PDFs
• Displays extracted text with optional download
• Estimates GPT-4o token cost before summarizing
• Generates structured notes and glossary with Markdown output