feat(train): routes out and in as GPX (ADR 0030, D45)

A route's page shares it as GPX 1.1 (Android's share sheet, else saved
where the person chooses): its way a track with elevations, its
waypoints and turns as named points. A GPX file comes in from the Routes
tab or, on Android, opened with Train or shared to it; it is planned
along the paths through its points or kept as drawn, then named and
saved as a new route.

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_de.arb

@@ -405,6 +405,15 @@
   "routeAscent": "{metres} m bergauf",
   "routeDescent": "{metres} m bergab",
   "routeSummary": "{distance} · {ascent}",
+  "routesBringIn": "GPX-Datei hereinholen",
+  "routeBringInTitle": "{name} hereinholen",
+  "routeBringInSnap": "Entlang der Wege planen",
+  "routeBringInSnapHint": "Durch ihre Punkte, mit dem Profil deiner Wahl; ihre Abzweigungen angesagt",
+  "routeBringInDrawn": "So lassen, wie sie ist",
+  "routeBringInDrawnHint": "Ihr Weg, wie ihn die Datei hat, ohne Ansagen",
+  "routeNotGpx": "In dieser Datei steckt keine Route, die Train lesen kann",
+  "routeShareGpx": "Als GPX teilen",
+  "routeSaveGpx": "Als GPX speichern",
   "routeOffline": "Karte offline behalten",
   "routeOfflineOff": "Die Karte entlang des Wegs, 2 km zu beiden Seiten, auf diesem Gerät für unterwegs ohne Netz",
   "routeOfflineLoading": "Karte wird gespeichert: {done} von {total} Kacheln",

apps/train/halkyon_train_flutter/lib/l10n/app_en.arb

@@ -513,6 +513,17 @@
   "@routeDescent": {"placeholders": {"metres": {"type": "int"}}},
   "routeSummary": "{distance} · {ascent}",
   "@routeSummary": {"description": "A route in the list: its distance and climb.", "placeholders": {"distance": {"type": "String", "example": "12.3 km"}, "ascent": {"type": "String", "example": "120 m up"}}},
+  "routesBringIn": "Bring in a GPX file",
+  "@routesBringIn": {"description": "In the Routes tab: a route brought in from a GPX file (ADR 0030, D45)."},
+  "routeBringInTitle": "Bring in {name}",
+  "@routeBringInTitle": {"placeholders": {"name": {"type": "String", "example": "Isar loop"}}},
+  "routeBringInSnap": "Plan it along the paths",
+  "routeBringInSnapHint": "Through its points, with the profile you choose; its turns told",
+  "routeBringInDrawn": "Keep it as drawn",
+  "routeBringInDrawnHint": "Its way as the file has it, no turns told",
+  "routeNotGpx": "This file holds no route Train can read",
+  "routeShareGpx": "Share as GPX",
+  "routeSaveGpx": "Save as GPX",
   "routeOffline": "Keep the map offline",
   "@routeOffline": {"description": "A switch on a saved route: its map kept on this device (ADR 0030, D45)."},
   "routeOfflineOff": "Its map along the way, 2 km either side, on this device for when there's no network",

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

@@ -2452,6 +2452,60 @@ abstract class AppLocalizations {
   /// **'{distance} · {ascent}'**
   String routeSummary(String distance, String ascent);
 
+  /// In the Routes tab: a route brought in from a GPX file (ADR 0030, D45).
+  ///
+  /// In en, this message translates to:
+  /// **'Bring in a GPX file'**
+  String get routesBringIn;
+
+  /// No description provided for @routeBringInTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Bring in {name}'**
+  String routeBringInTitle(String name);
+
+  /// No description provided for @routeBringInSnap.
+  ///
+  /// In en, this message translates to:
+  /// **'Plan it along the paths'**
+  String get routeBringInSnap;
+
+  /// No description provided for @routeBringInSnapHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Through its points, with the profile you choose; its turns told'**
+  String get routeBringInSnapHint;
+
+  /// No description provided for @routeBringInDrawn.
+  ///
+  /// In en, this message translates to:
+  /// **'Keep it as drawn'**
+  String get routeBringInDrawn;
+
+  /// No description provided for @routeBringInDrawnHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Its way as the file has it, no turns told'**
+  String get routeBringInDrawnHint;
+
+  /// No description provided for @routeNotGpx.
+  ///
+  /// In en, this message translates to:
+  /// **'This file holds no route Train can read'**
+  String get routeNotGpx;
+
+  /// No description provided for @routeShareGpx.
+  ///
+  /// In en, this message translates to:
+  /// **'Share as GPX'**
+  String get routeShareGpx;
+
+  /// No description provided for @routeSaveGpx.
+  ///
+  /// In en, this message translates to:
+  /// **'Save as GPX'**
+  String get routeSaveGpx;
+
   /// A switch on a saved route: its map kept on this device (ADR 0030, D45).
   ///
   /// In en, this message translates to:

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

@@ -1464,6 +1464,38 @@ class AppLocalizationsDe extends AppLocalizations {
     return '$distance · $ascent';
   }
 
+  @override
+  String get routesBringIn => 'GPX-Datei hereinholen';
+
+  @override
+  String routeBringInTitle(String name) {
+    return '$name hereinholen';
+  }
+
+  @override
+  String get routeBringInSnap => 'Entlang der Wege planen';
+
+  @override
+  String get routeBringInSnapHint =>
+      'Durch ihre Punkte, mit dem Profil deiner Wahl; ihre Abzweigungen angesagt';
+
+  @override
+  String get routeBringInDrawn => 'So lassen, wie sie ist';
+
+  @override
+  String get routeBringInDrawnHint =>
+      'Ihr Weg, wie ihn die Datei hat, ohne Ansagen';
+
+  @override
+  String get routeNotGpx =>
+      'In dieser Datei steckt keine Route, die Train lesen kann';
+
+  @override
+  String get routeShareGpx => 'Als GPX teilen';
+
+  @override
+  String get routeSaveGpx => 'Als GPX speichern';
+
   @override
   String get routeOffline => 'Karte offline behalten';
 

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

@@ -1456,6 +1456,37 @@ class AppLocalizationsEn extends AppLocalizations {
     return '$distance · $ascent';
   }
 
+  @override
+  String get routesBringIn => 'Bring in a GPX file';
+
+  @override
+  String routeBringInTitle(String name) {
+    return 'Bring in $name';
+  }
+
+  @override
+  String get routeBringInSnap => 'Plan it along the paths';
+
+  @override
+  String get routeBringInSnapHint =>
+      'Through its points, with the profile you choose; its turns told';
+
+  @override
+  String get routeBringInDrawn => 'Keep it as drawn';
+
+  @override
+  String get routeBringInDrawnHint =>
+      'Its way as the file has it, no turns told';
+
+  @override
+  String get routeNotGpx => 'This file holds no route Train can read';
+
+  @override
+  String get routeShareGpx => 'Share as GPX';
+
+  @override
+  String get routeSaveGpx => 'Save as GPX';
+
   @override
   String get routeOffline => 'Keep the map offline';