new option: Lock on Startup Only

apps/weblibre/lib/features/user/data/models/auth_settings.dart

@@ -23,7 +23,7 @@ import 'package:json_annotation/json_annotation.dart';
 
 part 'auth_settings.g.dart';
 
-enum AutoLockMode { background, timeout }
+enum AutoLockMode { background, timeout, startup }
 
 @CopyWith()
 @JsonSerializable()
@@ -56,6 +56,10 @@ class AuthSettings with FastEquatable {
     return copyWith(autoLockMode: AutoLockMode.timeout, timeout: value);
   }
 
+  AuthSettings withStartupLock() {
+    return copyWith(autoLockMode: AutoLockMode.startup);
+  }
+
   factory AuthSettings.fromJson(Map<String, dynamic> json) =>
       _$AuthSettingsFromJson(json);
 

apps/weblibre/lib/features/user/data/models/auth_settings.g.dart

@@ -105,4 +105,5 @@ Map<String, dynamic> _$AuthSettingsToJson(AuthSettings instance) =>
 const _$AutoLockModeEnumMap = {
   AutoLockMode.background: 'background',
   AutoLockMode.timeout: 'timeout',
+  AutoLockMode.startup: 'startup',
 };