New public method that transitions to SCREEN_OFF on demand. A
_justWokeFromOff flag is set in activity() and cleared at the end
of loop() so a single keypress that woke the screen can't immediately
re-blank it via a hotkey/long-press handler running in the same tick.
Pure infrastructure — no UI binding included; consumers can wire it
to whatever input event they want (long-press, hotkey, etc.).
Screen idle:
- Remove powerMgr.activity() from radio yield callback — screen no
longer wakes on LoRa RX, auto-announce, or RSSI polls
- Add [POWER] state transition logging for on-device diagnostics
Radio regions:
- Add 4-region system: Americas (915), Europe (868), Australia (915),
Asia (923) with timezone-to-region mapping
- Region picker in Radio settings (always visible)
- Presets now apply region-appropriate frequency + modulation params
- Timezone change warns if it suggests a different radio region
Frequency input (developer mode):
- Hz-precision input (9 digits) displayed as MHz with trimmed decimals
- Left/right arrows step by 125 kHz, digit keys for direct entry
- Inspired by @strijar in https://github.com/ratspeak/ratdeck/pull/12
- Migrate all screens to LVGL v8.4 widget system
- Non-blocking radio TX (async endPacket via LoRaInterface)
- Live TCP server switching with transient node cleanup
- Fix UI freeze during radio transmit
- Trackball long-press delete, deferred click with debounce
- Pin microReticulum to 392363c, fix list_directory API
- Fix CI build: portable include path, remove hardcoded local path
dj2ls