redbear-power: bulletproof cpufreq backend with writability check
- cpufreq.rs: complete rewrite — Backend enum (Redox/Linux), Cpufreq
struct with self-discovering governor list, probe-based discovery
on Redox, writability verification by writing current governor
back. No hardcoded governor names — cycle order follows discovered
list. Handles intel_pstate (no ondemand), permission-denied,
and absent cpufreq gracefully.
- app.rs: Cpufreq stored in App instead of Governor enum, eliminates
per-poll probe overhead. cycle_governor flashes root-required
when sysfs denies write.
- render.rs, dbus.rs: use cpufreq.active string directly
vasilito
d2b969eb05