Setup improvements: Added pi-setup.sh (clone-before-venv, requirements-based install) + HDMI-CEC cec-utils inclusion. Dependencies: Corrected python-dotenv, added server-side rendering + CEC notes in requirements.txt. CEC integration: Confirmed and documented usage; minor wording adjustments.
README: document dev-mode CEC auto-disable; add testing notes; set CEC_POWER_OFF_WAIT=5 Copilot instructions: add dev-mode CEC behavior and test script guidance test-hdmi-cec.sh: respect ENV=development (skip option 5), explicit .env load, ASCII output, 30s wait display_manager: remove emoji from logs to avoid Unicode errors