Micswitch v2.0.1 (#4723)

- **New:** Persistent Mute toggle in dashboard settings. When checked, mute state survives device cycles (USB replug, sleep/wake, driver resets).
- **Fixed:** Persistent mute now survives device cycling — mute is re-applied to the newly defaulted device after switching.
- **Fixed:** Tray icon red-dot overlay updates after persistent re-muting.
- **Fixed:** "Persistent Mute" checkbox text now renders correctly on the dark dashboard.

Author: BlackPaw21