FEAT-DEEPSLEEP: Display-Refresh-Timer + CPU-Throttle + Admin Power-Tab
DeepSleep-Modus fuer das ePaper-Display:
- dashboard.py: _is_deepsleep(), _next_wake(), _seconds_until_wake(),
_apply_cpu_throttle() (Pi auf 600MHz im Sleep)
- 60s sleep-chunks in main loop statt festes Intervall
- render_full() mit deepsleep_active + next_wake params
- ZZZ-Indikator + CPU-Throttle-Badge wenn schlafend
- load_config() auto-filled 'power' defaults aus POWER_DEFAULTS
Admin UI (templates/power.html + admin.py):
- /power (GET+POST): DeepSleep-Toggle, Wake-Times, CPU-Throttle-Settings
- /api/power (JSON): live status polling fuer Sidebar-Badge
- /api/wake (POST): manuelles Display-Aufwecken aus dem Admin
- templates/index.html: Energie-Sidebar-Link + Live-Status-Badge
(Zz / wach / an / aus) via refreshPowerStatus()
Patrik
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