Ultra-robust monkey-patching and FER import safety

Fix FER import error and improve monkey-patching for Keras 3 compatibility

Optimize Dockerfile for Hugging Face deployment

Update child level calculation and prepare for deployment

Fix: Monkey-patch tensorflow.keras and set Keras backend to torch to resolve FER import error on Hugging Face Spaces

Fix: Add Hugging Face Space configuration metadata to README.md

Fix: Add keras to requirements to resolve FER import error on Hugging Face

Remove metadata from README.md

Feat: Improve quiz mode with level-based filtering, inline feedback, and retry logic

Feat: Expand quiz questions for all levels and categories

Fix: Add automatic model reloading in backend and improve training feedback

fix: updated TemplateResponse signature for Starlette compatibility

fix: working version after HF changes

Update backend/requirements.txt

Update Dockerfile

Update README.md

Update README.md

chore: update port for Hugging Face compatibility

initial commit

Initial commit