Download HTTP video URLs to temp file before opening with OpenCV

Add /api prefix to routes and HTTP polling fallback for WS-blocked environments

Fix API routes under /api prefix

Fix SPA serving: use StaticFiles html=True mount instead of 404 handler

Remove traffic.mp4 from tracking, add to .gitignore

Fix SPA routing: use 404 handler instead of wildcard GET to avoid clashing with POST routes

Fix missing libGL and other OpenCV system deps on Debian slim

Fix OpenCV missing system libs and enable frontend serving on HF Spaces

Fix .dockerignore: include dashboard source for HF Spaces build

Add HF Spaces deployment

End-to-end real-time traffic analytics pipeline — YOLOv8s ONNX