fix(ui): community v1.27 feedback — GPS altitude field, noise floor, Msg wake location, units

- Add a separate "Altitude (GPS)" dashboard field (label AltG) alongside
  the existing barometric one (now labelled "Altitude (Baro)") -- the
  original single Altitude field only ever read a barometric sensor's
  CayenneLPP telemetry, showing "--" on any board without one even with
  a perfectly good GPS fix.
- Every altitude reading (baro + GPS, Clock and Lock screen) and the GPS
  home page's "alt" row now go through a shared fmtAlt() helper and
  respect Settings > System > Units, same as every other distance in the
  UI -- none of them checked units_imperial before. Same fix for
  Locator's Radius row, which always showed metric regardless.
- Radio home page's noise floor showed "n/a" whenever Pwr save (RX
  duty-cycle) was on, on the assumption duty-cycle RX can't sample the
  floor. That's stale: RadioLibWrapper already periodically recalibrates
  it (noiseFloorCalibCheck(), every 60s) even under duty-cycle, which is
  exactly why Diagnostics' unconditional read of the same value was
  already showing something real. Radio home page now matches.
- Moved "Msg wake" from Settings > Sound to Settings > Display -- more
  logical home for a display-wake toggle than notifications. Menu-order
  only; NodePrefs storage is unaffected by this enum's ordering.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/solo_features/clock_screen/clock_screen.md

@@ -40,12 +40,13 @@ Up to three data fields are shown below the date separator. Each field displays
 | Humidity    | Hum   | % from onboard sensor                                                     |
 | Pressure    | Pres  | hPa from onboard sensor                                                   |
 | GPS         | GPS   | `lat lon` decimal degrees, or `no fix`                                    |
-| Altitude    | Alt   | metres from onboard sensor (GPS or barometric)                            |
+| Altitude (Baro) | Alt | metres/feet (per Settings › System › Units) from onboard barometric sensor (`--` without one) |
 | Luminosity  | Lux   | lux from onboard sensor                                                   |
 | CO₂         | CO2   | ppm from onboard sensor                                                   |
 | Contacts    | Nodes | Total contacts in the mesh                                                |
 | Messages    | Msgs  | Total unread message count                                                |
 | Satellites  | Sats  | GPS satellite count (or `--` without GPS)                                 |
+| Altitude (GPS) | AltG | metres/feet (per Settings › System › Units) from the GPS fix (or `no fix`) |
 
 Sensor fields show `--` when the sensor is not connected or has no data.
 

docs/solo_features/settings_screen/settings_screen.md

@@ -27,6 +27,7 @@ Press **Cancel/Back** to save and return to the home screen.
 | Display rotation _(e-ink only)_      | 0° / 90° / 180° / 270°           | Applied immediately                                                                                   |
 | Joystick rotation _(e-ink only)_     | 0° / 90° / 180° / 270°           | Rotates input mapping independently of display rotation; useful for custom enclosures                 |
 | Full refresh interval _(e-ink only)_ | OFF / 5 / 10 / 20 / 30           | Partial refreshes between full clears; reduces ghosting on long sessions                              |
+| Msg wake                             | ON / OFF                         | Whether an incoming message turns the display back on when it was off and no phone/app is connected (default ON — today's behaviour either way). |
 
 ---
 
@@ -40,7 +41,6 @@ Press **Cancel/Back** to save and return to the home screen.
 | Channel Melody | built-in / Melody 1 / Melody 2 / None | Notification sound for incoming channel messages. `None` disables the sound for this event. |
 | AD sound       | built-in / Melody 1 / Melody 2 / None | Sound played whenever an **advert** is received from *any* node — pairs with Auto-Advert as an audible "in range" heartbeat (see Tools › Auto-Advert). `None` disables the sound for this event. |
 | AD scope       | All / Zero-hop                | Filters the AD sound so it plays for every advert or only for local zero-hop adverts. |
-| Msg wake       | ON / OFF                       | Whether an incoming message turns the display back on when it was off and no phone/app is connected (default ON — today's behaviour either way). |
 
 Melody 1 and Melody 2 are custom sequences editable in **Tools › Ringtone Editor**.