Update SignIn page and fix Dockerfile cache busting

Update: ChatWidget, MyProfile, resume parser, CSS and backend changes

Fix AI provider: Switch from Gemma 3 4b to Llama-3.1-8B-Instruct (chat-compatible)

Force HuggingFace provider with Gemma 3 4B for all AI operations

Fix SHAP compatibility: Pin xgboost<=2.0.3

Fix HF Space build: Add missing mapped data CSV files

Fix HF Space build: Add missing amcat_mapper.py step to data generation

Fix model serialization: Generate models natively during Docker build

Fix HF Space build: Add pre-trained model binaries

Fix HF Space build: Update Node version from 18 to 20 for Vite 8 compatibility

Fix HF Space build: Add build-essential and libgomp1 for ML dependencies

Fix HF Spaces missing configuration in README

Initial commit for HF Spaces

initial commit