auto-claude: subtask-4-2 - Update routes_page.dart to use new dialog components

- Replaced inline loading dialogs with LoadingDialog component
- Replaced inline notes dialog with NotesDialog component
- Replaced inline photo confirmation dialog with PhotoCaptureDialog component
- Added missing localization strings for completingDelivery, markingAsUncompleted, and deliveryMarkedUncompleted
- Fixed BuildContext usage across async gaps by capturing l10n early
- Fixed unused result warnings by using ref.invalidate instead of ref.refresh
- Removed unnecessary non-null assertions

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

lib/l10n/app_localizations.dart

@@ -631,6 +631,24 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Retake'**
   String get retake;
+
+  /// No description provided for @completingDelivery.
+  ///
+  /// In en, this message translates to:
+  /// **'Completing delivery...'**
+  String get completingDelivery;
+
+  /// No description provided for @markingAsUncompleted.
+  ///
+  /// In en, this message translates to:
+  /// **'Marking as uncompleted...'**
+  String get markingAsUncompleted;
+
+  /// No description provided for @deliveryMarkedUncompleted.
+  ///
+  /// In en, this message translates to:
+  /// **'Delivery marked as uncompleted'**
+  String get deliveryMarkedUncompleted;
 }
 
 class _AppLocalizationsDelegate