Status bar: the Orin at a glance over every view, like a phone's

Link on the left (with the menu on the Dash), then hot temperature, CAN, OBD while
connected, GNSS fix and satellites, LTE, WiFi, UPS, and the dark/bright button. The
Dash's own top line is gone into it.

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

lib/README.md

@@ -29,6 +29,7 @@ pirate-station-aide's (main views, then the rarely used ones grouped as Tools).
 | `AccelGraph` | `widgets/accel_graph.dart` | G-meter: a dot for lateral/longitudinal g, a trace and a peak marker over a window | smart-serow |
 | `GpsCompass` | `widgets/gps_compass.dart` | Heading arrow and bearing; "ACQ" while acquiring, "N/A" without | smart-serow, from gps-speedo |
 | `LinkChip`, `LinkDetails` | `widgets/link_status.dart` | The link's state in good / caution / alarm; address, last-message age, clock offset, USB link | Yukart |
+| `StatusBar` | `widgets/status_bar.dart` | The Orin like a phone's status bar, over every view: link, then hot temperature, CAN, OBD (while connected), GNSS fix and satellites, LTE, WiFi, UPS; and the dark/bright button | Yukart |
 | `MockBanner` | `widgets/mock_banner.dart` | "MOCK DATA — NOT FROM THE CAR" in caution, over every page while the gateway is mocking | Yukart |
 
 ## Conventions
@@ -41,7 +42,7 @@ pirate-station-aide's (main views, then the rarely used ones grouped as Tools).
   `onFill(colour)` (text on a fill). No widget names a colour. Themes are JSON in `assets/themes/`, `rei` by
   default; smart-serow's four-key files still load (their `highlight` is `alarm`).
 - **Dark or bright.** `Themes.mode` is `auto` (Android's dark theme, schedule included), `dark` or
-  `bright`, chosen in Settings and kept across restarts. The Dash's quick button holds the other variant;
+  `bright`, chosen in Settings and kept across restarts. The status bar's button holds the other variant;
   a long press there is auto again.
 - **Cosmetic fonts are opt-in.** A widget that wants the HUD face names `fontFamily: hudFont` in its own
   `TextStyle`; everything else keeps the basic font, which covers CJK where DIN 1451 does not.