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dff77e105d
PiSugar 3 users need graceful shutdown with e-ink feedback, boot-loop prevention when charging from dead battery, and automatic recovery when pisugar-server loses I2C connection after MCU wake. - safe-shutdown.sh: stops pwnagotchi, draws sleeping face on e-ink, powers off. Boot-loop guard skips shutdown when battery <10% and charging. - pisugar-watchdog.sh + systemd timer: detects MCU wake from deep sleep and restarts pisugar-server when I2C is present but daemon reports disconnected. - epd-shutdown.py / epd-startup.py: e-ink display faces for Waveshare V4. Exit silently on non-V4 displays. Signed-off-by: CoderFX <4704376+CoderFX@users.noreply.github.com>