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

Hide phase marker from chat and ban excessive validation

Fix phase progression and ban suggested examples

Use openrouter/free as default model for reliable free inference

Strip whitespace from env vars and add LLM call logging

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

Fix LLM client: lazy init for HF Spaces env vars

Fix LLM client: lazy init to ensure env vars are loaded on HF Spaces

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

Add file upload RAG: requirements + rag.py

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

Switch from Ollama to OpenRouter for LLM inference

Build AIM Learning Companion - Socratic AI tutor for professional training