feat(train): a recording under way above the bar on every tab, and a saved one opens its page (ADR 0030, D60)

halkyon_ui's NavigationFrame takes a status, standing above the floating
bar below medium windows and at the foot of the screen's panel from there
on. Train's RecordingBar fills it while a recording runs or waits to be
saved: its activity, moving time and distance, paused or stopped, a tap
back to it. Saving now opens the workout's page in Home's tab.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/train/halkyon_train_flutter/lib/l10n/app_localizations.dart

@@ -3423,6 +3423,18 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Version {version} (build {build})'**
   String settingsVersion(String version, String build);
+
+  /// No description provided for @recordingBarStopped.
+  ///
+  /// In en, this message translates to:
+  /// **'Stopped: save or discard it'**
+  String get recordingBarStopped;
+
+  /// No description provided for @recordingBarDistance.
+  ///
+  /// In en, this message translates to:
+  /// **'{km} km'**
+  String recordingBarDistance(String km);
 }
 
 class _AppLocalizationsDelegate