Final cleanup: Organize files, remove redundant assets, and update manifest

Fix: Properly hide video overlay during active sessions

Fix: Ensure video overlay hides correctly when session starts

UI Refinement: Center video overlay, unify meeting metrics, and fix dashboard navigation

Fix: Enable secure WebSocket (WSS) for HTTPS environments

Fix Docker build: Use libgl1 instead of libgl1-mesa-glx

Add Hugging Face Space configuration metadata

Professionalize UI and docs: Remove emojis and refine deployment guide

Add Dockerfile and deployment guide for Hugging Face Spaces

Initial commit: FocusFlow FastAPI/C++ Architecture