V3-05: mounted (handlebar) mode

Wake lock via a WakelockController seam (mirrors LocationSource), gated strictly to actual recording and released on stop/discard/navigate-away/dispose. High-contrast ripprMountedTheme() applied only to the record screen. BigStat gained a scale param for the headline figure rather than a blanket TextTheme.apply, which crashes on Material 3's default theme.

lib/src/ui/theme.dart

@@ -1,7 +1,9 @@
 /// Ported from `com.rippr.ui.theme.RipprTheme`.
 ///
-/// Dark-only by design. This is read at a glance in daylight with a visor down, and a
-/// light theme would be actively worse for that.
+/// Dark-only by design for a pocketed ride -- read at a glance, in a pocket-glance, at
+/// night as much as in daylight. V3-05 adds [ripprMountedTheme], a deliberate exception
+/// for the one screen that is actually looked at continuously, in direct daylight, behind
+/// a visor -- where the dark ground loses to glare instead of helping.
 library;
 
 import 'package:flutter/material.dart';
@@ -55,6 +57,56 @@ ThemeData ripprTheme() {
   );
 }
 
+// V3-05: mounted colours. Near-white ground, near-black ink -- the inverse tradeoff from
+// the pocketed theme above. Read against a visor in direct daylight, a dark ground loses
+// to glare in a way a dark theme never has to answer for at a pocket glance.
+const _mountedGround = Color(0xFFF5F3EF);
+const _mountedInk = Color(0xFF12100D);
+const _mountedAccent = Color(0xFFD84315);
+
+const ripprMountedColors = ColorScheme.light(
+  primary: _mountedAccent,
+  onPrimary: Color(0xFFFFFFFF),
+  secondary: Color(0xFF4A4034),
+  surface: Color(0xFFFFFFFF),
+  onSurface: _mountedInk,
+  surfaceContainerHighest: Color(0xFFE7E2D9),
+  onSurfaceVariant: _mountedInk,
+  outline: Color(0xFF706A5E),
+  error: Color(0xFFB3261E),
+  onError: Color(0xFFFFFFFF),
+);
+
+const ripprMountedBackground = _mountedGround;
+
+/// Scales body/headline text up for legibility at a glance, at speed, behind a visor.
+/// Kept separate from V3-16's visual identity work -- this is a stopgap born of a real
+/// constraint, not a design pass.
+const double mountedTextScale = 1.25;
+
+/// V3-05's mounted mode: high contrast, larger text. Only applied to the record screen
+/// while mounted, not the whole app -- everywhere else is still read at a pocket glance.
+ThemeData ripprMountedTheme() {
+  final base = ThemeData(
+    colorScheme: ripprMountedColors,
+    useMaterial3: true,
+    scaffoldBackgroundColor: _mountedGround,
+  );
+
+  return base.copyWith(
+    textTheme: base.textTheme.apply(
+      bodyColor: _mountedInk,
+      displayColor: _mountedInk,
+    ),
+    appBarTheme: const AppBarTheme(
+      backgroundColor: _mountedGround,
+      foregroundColor: _mountedInk,
+      elevation: 0,
+    ),
+    dividerTheme: const DividerThemeData(color: Color(0xFFDAD4C8), space: 1),
+  );
+}
+
 /// Monospace for anything numeric.
 ///
 /// Digits that change every second must not make the layout jitter, which proportional