App 2.24.1: remove the header line above the pages

The title and subtitle above every tab are gone; the pages start at
the top and gain about 45 dp. Their strings are removed. Emulator only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

SPECS.md

@@ -131,6 +131,11 @@ tyre pressures, GPS (lat, lon, elevation, heading) and the is_* flags. It does *
   confirmed car facts, app structure, UI conventions, build/test/ship, documents. It replaces
   upstream's EVABRPUploader text. The test emulator is now in the flake: `nix run .#car-emulator`
   (Android 9 AOSP at 1920×720, 160 dpi; the car build installs as the system user — checked).
+- 2026-10-24 — App 2.24.1 (branch `styles-retro-future`): the line of text above every page
+  ("Your drive at a glance.", "Settings. Display, battery…" and so on) is gone, at the owner's
+  request; the pages start at the top, level with the sidebar, and gain about 45 dp. Its 14
+  strings and the title arrays are removed. Checked on the emulator: no crash, and every tab
+  still fits 1778×640 without scrolling. Not tried on the car.
 - 2026-10-24 — App 2.24.0 (branch `styles-retro-future`): three more Overview styles, each one
   Canvas view fed the shared `ClusterValues` (now with the tyre pressures, formatted in the
   chosen unit). **Sci-fi** (`SciFiView`): a starship console — rounded elbow frames in orange