Finalize Railway deployment: optimized regex and cleaned redundant code

Add Procfile and runtime.txt for Railway deployment

Add model weights using Git LFS

Align gradio sdk version with requirements

Fix: Remove accidental library folders and pin dependencies

Fix dependency conflict and remove redundant api.py

Fix: Resolve HfFolder ImportError and clean requirements.txt

Remove redundant api.py and fix requirements encoding

Fix: Clean requirements.txt and add model safety check

Fix requirements and add Gradio UI

Fix requirements and add Gradio UI

Fix requirements and add Gradio UI

Remove model binaries and ignore .pkl files

Add Dockerfile and FastAPI backend

Add AI detector backend files

initial commit