Stabilize circle/pinch gesture runtime and add debug logging

[LuigisSourceCode]

Summary

• harden circle recognition with a closed-loop runtime, open-commit flow, and updated calibration/runtime contracts
• split gesture and UI action cooldown policy so swipe-to-circle transitions are not blocked by the old global timing behavior
• gate pinch close on an intentional pinch pose so fist-like thumb/index contact no longer starts drag, and add minimal browser console logging for gesture debugging

Details

• move circle detection away from a threshold-only path toward a semantic runtime state that tracks loop progress, return-to-start, and commit-on-open
• update the input orchestrator and gesture runtime cooldown handling to use family-aware timing instead of one broad non-pinch/global block
• add pinch pose configuration fields plus runtime checks for hand openness, thumb/index extension, and curled support fingers
• expose GestureDetected typing in the frontend and log GestureDetected, gesture match, and gesture action events in the browser console during dev
• expand backend tests for circle sequencing, pinch pose rejection, and swipe-to-circle behavior

Validation

• Backend/.venv/bin/pytest -q Backend/tests
• npm run build
• npm run test -- --run