feat(l10n): add authentication page headlines and update related strings

Author: fulleni

lib/l10n/app_localizations.dart

@@ -104,6 +104,18 @@ abstract class AppLocalizations {
   /// **'Hello World!'**
   String get helloWorld;
 
+  /// Headline for the main authentication page
+  ///
+  /// In en, this message translates to:
+  /// **'Dashboard Access'**
+  String get authenticationPageHeadline;
+
+  /// Subheadline for the main authentication page
+  ///
+  /// In en, this message translates to:
+  /// **'Secure sign-in for administrators and publishers.'**
+  String get authenticationPageSubheadline;
+
   /// Button label for signing in with email
   ///
   /// In en, this message translates to:
@@ -113,19 +125,19 @@ abstract class AppLocalizations {
   /// Title for the email sign-in page
   ///
   /// In en, this message translates to:
-  /// **'Email Sign In'**
+  /// **'Secure Email Sign-In'**
   String get emailSignInPageTitle;
 
   /// Headline for the request code page
   ///
   /// In en, this message translates to:
-  /// **'Sign in or create an account'**
+  /// **'Secure Email Sign-In'**
   String get requestCodePageHeadline;
 
   /// Subheadline for the request code page
   ///
   /// In en, this message translates to:
-  /// **'Enter your email to receive a verification code. No password needed!'**
+  /// **'Enter your authorized email to receive a secure sign-in code.'**
   String get requestCodePageSubheadline;
 
   /// Label for the email input field on the request code page

lib/l10n/app_localizations_ar.dart

@@ -11,19 +11,26 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get helloWorld => 'مرحبا بالعالم!';
 
+  @override
+  String get authenticationPageHeadline => 'الوصول إلى لوحة التحكم';
+
+  @override
+  String get authenticationPageSubheadline =>
+      'تسجيل دخول آمن للمسؤولين والناشرين.';
+
   @override
   String get authenticationEmailSignInButton =>
       'تسجيل الدخول بالبريد الإلكتروني';
 
   @override
-  String get emailSignInPageTitle => 'تسجيل الدخول بالبريد الإلكتروني';
+  String get emailSignInPageTitle => 'تسجيل دخول آمن بالبريد الإلكتروني';
 
   @override
-  String get requestCodePageHeadline => 'سجل الدخول أو أنشئ حسابًا';
+  String get requestCodePageHeadline => 'تسجيل دخول آمن بالبريد الإلكتروني';
 
   @override
   String get requestCodePageSubheadline =>
-      'أدخل بريدك الإلكتروني لتلقي رمز التحقق. لا حاجة لكلمة مرور!';
+      'أدخل بريدك الإلكتروني المعتمد لتلقي رمز تسجيل دخول آمن.';
 
   @override
   String get requestCodeEmailLabel => 'البريد الإلكتروني';

lib/l10n/app_localizations_en.dart

@@ -11,18 +11,25 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get helloWorld => 'Hello World!';
 
+  @override
+  String get authenticationPageHeadline => 'Dashboard Access';
+
+  @override
+  String get authenticationPageSubheadline =>
+      'Secure sign-in for administrators and publishers.';
+
   @override
   String get authenticationEmailSignInButton => 'Sign in with Email';
 
   @override
-  String get emailSignInPageTitle => 'Email Sign In';
+  String get emailSignInPageTitle => 'Secure Email Sign-In';
 
   @override
-  String get requestCodePageHeadline => 'Sign in or create an account';
+  String get requestCodePageHeadline => 'Secure Email Sign-In';
 
   @override
   String get requestCodePageSubheadline =>
-      'Enter your email to receive a verification code. No password needed!';
+      'Enter your authorized email to receive a secure sign-in code.';
 
   @override
   String get requestCodeEmailLabel => 'Email';