feat(l1): Home quick panels, map page with live data, quieter status bar

- Icon pages become quick panels: two or three rows (Settings, Messages,
  Bluetooth, Advert, Tools, Power) inset from the edges, the last one
  opening the full screen. Brightness and auto-advert are edited in place
  (Enter, Left/Right, Enter/Back saves once).
- Tools panel shows the two tools used last with their live state.
- Map page: preview on the left, GPS / trail / live / target on the right.
- Favourites as soft cards; Status tile with a battery spark line.
- Status bar without boxes or blinking; BT only when connected, GPS
  search glyph without a fix.
- Redrawn mini icons (advert waves, cog, wrench, messages); big hovering
  icons removed. Tools list is text only.

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

examples/companion_radio/ui-core/MessageHistory.h

@@ -184,6 +184,10 @@ public:
     return pos;
   }
 
+  // All channels' entries, newest first (j = 0): ring position for chAtPos().
+  int chHistCount() const { return _hist_count; }
+  int chHistPosNewest(int j) const { return (_hist_head + _hist_count - 1 - j) % CH_HIST_MAX; }
+
   // count history entries for a specific channel
   int histCountForChannel(int ch_idx) const {
     int n = 0;