refactor dialogs into separate files

app/lib/features/user/domain/presentation/dialogs/delete_profile_dialog.dart

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024-2025 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import 'package:flutter/material.dart';
+
+/// Dialog to confirm profile/user deletion.
+/// Returns true if user confirms deletion, false if cancelled, null if dismissed.
+Future<bool?> showDeleteProfileDialog(BuildContext context) {
+  return showDialog<bool?>(
+    context: context,
+    builder: (BuildContext context) {
+      return AlertDialog(
+        icon: const Icon(Icons.warning),
+        title: const Text('Delete User'),
+        content: const Text(
+          'Are you sure you want to delete this User including all data?',
+        ),
+        actions: <Widget>[
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context, false);
+            },
+            child: const Text('Cancel'),
+          ),
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context, true);
+            },
+            child: const Text('Delete'),
+          ),
+        ],
+      );
+    },
+  );
+}

app/lib/features/user/domain/presentation/dialogs/override_profile_dialog.dart

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024-2025 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import 'package:flutter/material.dart';
+
+/// Dialog to confirm overriding existing profile during restore.
+/// Returns true if user confirms override, false if cancelled, null if dismissed.
+Future<bool?> showOverrideProfileDialog(BuildContext context) {
+  return showDialog<bool?>(
+    context: context,
+    builder: (BuildContext context) {
+      return AlertDialog(
+        icon: const Icon(Icons.warning),
+        title: const Text('Override User'),
+        content: const Text(
+          'Are you sure you want to override the exisiting User?',
+        ),
+        actions: <Widget>[
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context, false);
+            },
+            child: const Text('Cancel'),
+          ),
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context, true);
+            },
+            child: const Text('Override'),
+          ),
+        ],
+      );
+    },
+  );
+}

app/lib/features/user/domain/presentation/dialogs/password_confirmation_dialog.dart

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2024-2025 Fabian Freund.
+ *
+ * This file is part of WebLibre
+ * (see https://weblibre.eu).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import 'package:flutter/material.dart';
+
+/// Dialog to confirm password during backup creation.
+/// Returns the entered password string if confirmed, null if cancelled or dismissed.
+Future<String?> showPasswordConfirmationDialog(BuildContext context) {
+  return showDialog<String>(
+    context: context,
+    builder: (context) {
+      final controller = TextEditingController();
+
+      return AlertDialog(
+        title: const Text('Password Confirmation'),
+        content: TextField(
+          controller: controller,
+          enableSuggestions: false,
+          autocorrect: false,
+          enableIMEPersonalizedLearning: false,
+          keyboardType: TextInputType.visiblePassword,
+          obscureText: true,
+          decoration: const InputDecoration(
+            labelText: 'Password',
+            floatingLabelBehavior: FloatingLabelBehavior.always,
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+            child: const Text('Cancel'),
+          ),
+          TextButton(
+            onPressed: () {
+              Navigator.of(context).pop(controller.text);
+            },
+            child: const Text('Confirm'),
+          ),
+        ],
+      );
+    },
+  );
+}