feat(ui): status-bar mini-icons + settings fixes

- Replace single-letter M/B/A/G top-bar indicators with scalable mini-icons:
  ICON_MUTE (speaker+cross), ICON_BLUETOOTH (rune), ICON_ADVERT (broadcast
  mast+waves), ICON_TRAIL (map pin). Centred in the cw+2 indicator box;
  disconnected BT shows the plain glyph instead of lowercase b.
- fix(settings): right-side values used display.valCol() without the scrollbar
  reserve, so after expanding a section they rendered under the indicator.
  Route all value cursors through valCol(display) = display.valCol() - _reserve.
- fix(settings): font toggle used ^=1, which on a stale value of 2 (older Hybrid
  build) flips 2<->3 — both nonzero, locking applyFont() on Lemon with no way
  back. Normalise: use_lemon_font = use_lemon_font ? 0 : 1.
- docs(settings): document Messages > Resend setting.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/solo_features/settings_screen/settings_screen.md

@@ -93,4 +93,8 @@ Lists all available home screen pages. For each entry:
 
 ### Messages
 
+| Setting | Options        | Notes                                                                                          |
+| ------- | -------------- | ---------------------------------------------------------------------------------------------- |
+| Resend  | off / 1×–5×    | Auto-resend an on-device direct message this many times when no delivery ACK is received (default 2×) |
+
 Up to 10 quick reply templates (Q1–Q10). Press **Enter** on a slot to open the keyboard editor. Supports the same placeholders as the main keyboard (`{time}`, `{loc}`, and sensor placeholders when connected).