feat(ui-lvgl): quick panel from the status bar; L2 fixes from rc1

The quick panel, as a phone's: pulled down from the status bar (or a tap
on it). Bluetooth, WiFi, GPS, sound, trail and live share switch at a
tap; Advert opens the advert popup (moved here from the Nodes header);
Lock locks the screen; a brightness slider. Holding a tile opens its
settings. Lock and sun glyphs added to the fonts.

Fixes from rc1 testing on the L2:
- GPS status icon: none when GPS is off (the module kept its last fix
  valid, so it stayed green); grey on, green with a fix. ensureGps()
  turns GPS on before trusting that stale fix.
- Screen wake: the panel wakes dark, a frame is drawn, then the
  backlight fades in -- no white flash. Off fades out first.
- Power off / flat battery: the chip wakes every 30 s to look for USB
  power and starts when plugged in (it slept with no wake source before,
  until the reset button). Plugged in when switched off: stays off until
  re-plugged.
- Message ages in a conversation refresh every 2 s, as on ui-new; the
  message popup keeps its age, repeaters heard and delivery up to date.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/solo/getting-started.md

@@ -54,6 +54,12 @@ Settings and Messages are always shown.
 > **Wio Tracker L2:** pages you swipe between: favourite chats, the clock
 > (where it starts), a minimap, then the apps, six to a page. Hold an app to
 > arrange or hide them.
+>
+> Pull down from the status bar (or tap it) for the quick panel: Bluetooth,
+> WiFi, GPS, sound, trail and live share switch at a tap, Advert sends an
+> advert or sets the automatic one, Lock locks the screen, and the slider
+> sets the brightness. Hold a tile for its settings. Swipe it up, or tap
+> below it, to put it away.
 
 ## Connecting the phone app