feat(mobile): compatibility message warning (#10065)

* feat(mobile): compatibility message warning

* refactor and better signature

mobile/lib/widgets/forms/login/email_input.dart

@@ -0,0 +1,49 @@
+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+
+class EmailInput extends StatelessWidget {
+  final TextEditingController controller;
+  final FocusNode? focusNode;
+  final Function()? onSubmit;
+
+  const EmailInput({
+    super.key,
+    required this.controller,
+    this.focusNode,
+    this.onSubmit,
+  });
+
+  String? _validateInput(String? email) {
+    if (email == null || email == '') return null;
+    if (email.endsWith(' ')) return 'login_form_err_trailing_whitespace'.tr();
+    if (email.startsWith(' ')) return 'login_form_err_leading_whitespace'.tr();
+    if (email.contains(' ') || !email.contains('@')) {
+      return 'login_form_err_invalid_email'.tr();
+    }
+    return null;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return TextFormField(
+      autofocus: true,
+      controller: controller,
+      decoration: InputDecoration(
+        labelText: 'login_form_label_email'.tr(),
+        border: const OutlineInputBorder(),
+        hintText: 'login_form_email_hint'.tr(),
+        hintStyle: const TextStyle(
+          fontWeight: FontWeight.normal,
+          fontSize: 14,
+        ),
+      ),
+      validator: _validateInput,
+      autovalidateMode: AutovalidateMode.always,
+      autofillHints: const [AutofillHints.email],
+      keyboardType: TextInputType.emailAddress,
+      onFieldSubmitted: (_) => onSubmit?.call(),
+      focusNode: focusNode,
+      textInputAction: TextInputAction.next,
+    );
+  }
+}