Current: planning guard proposal

Review the independently proposed patch below, including its unchanged callers. Work in the real product frontend and the transactional backend. Accept a connector if it occurs anywhere in a station connector list and enforce individual power limits. Concurrent overlapping plans share the site power budget across every selected station. Split charging minutes at peak-rate boundaries, round the final cents upward, and show scheduled kWh from power times hours. The board-to-API adapter and an authoritative planning guard both contain defects. The browser workflow and direct API checks must agree on the same contract. Run bash test/run.sh. The public checks drive Chromium against native HTTP and a real database; each scoring group includes regression safeguards.

Review focus: full-stack-product