Make companion respond in the selected language (EN/FR)

Reapply all fixes on main after merge overwrite

Merge branch 'main' of http://127.0.0.1:46517/git/Rochikh/aim

Fix phase progression and ban suggested examples

Add /download endpoint to serve corpus files

Fix silent API error handling in chat

Add error logging and debug endpoints for LLM troubleshooting

Add error logging and LLM debug endpoint for troubleshooting

Add file upload RAG: main.py + index.html

Add file upload for RAG: PDF, PPTX, TXT, ZIP support with drag & drop

Deploy AIM Learning Companion to HF Spaces

Rewrite app: strict Socratic questioning engine with FastAPI backend

Build AIM Learning Companion - Socratic AI tutor for professional training