fix: load .env BEFORE importing signbridge — env-driven model name was always falling back

fix: webcam stream actually fires + JS auto-arms record toggle

fix: webcam capture — global cache, .change() event, drop share=True

fix: share=True + SPACE_ID env to skip gradio's localhost-check pre-flight

fix: set SYSTEM=spaces so gradio skips its localhost-check on HF Docker

fix: switch to Docker SDK so Python + launch are fully under our control

fix: app.py — let HF Spaces gradio runtime handle server_name/port

fix: 4 BLOCKERs + 6 IMPORTANTs from deep-check audit

feat: SignBridge initial scaffold + tests