refactor(l10n): remove unused localization strings and fix descriptions

- Remove unused localization strings for saved filters limits
- Rename and update descriptions for saved headlines filter limits
- Update Arabic and English localization files accordingly
- Adjust ARB files to reflect changes in localization strings

Author: fulleni

lib/l10n/app_localizations.dart

@@ -1604,30 +1604,6 @@ abstract class AppLocalizations {
   /// **'Saved Headlines Filter Limits'**
   String get savedHeadlinesFilterLimitsTitle;
 
-  /// Label for Guest Saved Filters Limit
-  ///
-  /// In en, this message translates to:
-  /// **'Guest Saved Filters Limit'**
-  String get guestSavedFiltersLimitLabel;
-
-  /// Label for Standard User Saved Filters Limit
-  ///
-  /// In en, this message translates to:
-  /// **'Standard User Saved Filters Limit'**
-  String get standardUserSavedFiltersLimitLabel;
-
-  /// Label for Premium User Saved Filters Limit
-  ///
-  /// In en, this message translates to:
-  /// **'Premium User Saved Filters Limit'**
-  String get premiumUserSavedFiltersLimitLabel;
-
-  /// Description for the limit on saved headlines filters
-  ///
-  /// In en, this message translates to:
-  /// **'Maximum number of saved headlines filters this user role can create.'**
-  String get savedFiltersLimitDescription;
-
   /// Label for Ad Placement Interval
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_ar.dart

@@ -841,25 +841,10 @@ class AppLocalizationsAr extends AppLocalizations {
 
   @override
   String get savedHeadlinesFilterLimitsDescription =>
-      'Set limits on the number of saved headlines filters for each user tier.';
+      'الحد الأقصى لعدد مرشحات العناوين المحفوظة التي يمكن لهذا الدور إنشاؤها.';
 
   @override
-  String get savedHeadlinesFilterLimitsTitle => 'Saved Headlines Filter Limits';
-
-  @override
-  String get guestSavedFiltersLimitLabel => 'Guest Saved Filters Limit';
-
-  @override
-  String get standardUserSavedFiltersLimitLabel =>
-      'Standard User Saved Filters Limit';
-
-  @override
-  String get premiumUserSavedFiltersLimitLabel =>
-      'Premium User Saved Filters Limit';
-
-  @override
-  String get savedFiltersLimitDescription =>
-      'Maximum number of saved headlines filters this user role can create.';
+  String get savedHeadlinesFilterLimitsTitle => 'حدود تصفيات العناوين المحفوظة';
 
   @override
   String get adPlacementIntervalLabel => 'فترة وضع الإعلان';

lib/l10n/app_localizations_en.dart

@@ -844,21 +844,6 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get savedHeadlinesFilterLimitsTitle => 'Saved Headlines Filter Limits';
 
-  @override
-  String get guestSavedFiltersLimitLabel => 'Guest Saved Filters Limit';
-
-  @override
-  String get standardUserSavedFiltersLimitLabel =>
-      'Standard User Saved Filters Limit';
-
-  @override
-  String get premiumUserSavedFiltersLimitLabel =>
-      'Premium User Saved Filters Limit';
-
-  @override
-  String get savedFiltersLimitDescription =>
-      'Maximum number of saved headlines filters this user role can create.';
-
   @override
   String get adPlacementIntervalLabel => 'Ad Placement Interval';
 

lib/l10n/arb/app_ar.arb

@@ -1038,8 +1038,12 @@
   "@adFrequencyDescription": {
     "description": "وصف تكرار الإعلان"
   },
-  "savedHeadlinesFilterLimitDescription": "الحد الأقصى لعدد مرشحات العناوين المحفوظة التي يمكن لهذا الدور إنشاؤها.",
-  "@savedHeadlinesFilterLimitDescription": {
+  "savedHeadlinesFilterLimitsTitle": "حدود تصفيات العناوين المحفوظة",
+  "@savedHeadlinesFilterLimitsTitle": {
+    "description": "وصف لحد المرشحات المحفوظة"
+  },
+  "savedHeadlinesFilterLimitsDescription": "الحد الأقصى لعدد مرشحات العناوين المحفوظة التي يمكن لهذا الدور إنشاؤها.",
+  "@savedHeadlinesFilterLimitsDescription": {
     "description": "وصف لحد المرشحات المحفوظة"
   },
   "adPlacementIntervalLabel": "فترة وضع الإعلان",

lib/l10n/arb/app_en.arb

@@ -1046,22 +1046,6 @@
   "@savedHeadlinesFilterLimitsTitle": {
     "description": "Title for the Saved Headlines Filter Limits section"
   },
-  "guestSavedFiltersLimitLabel": "Guest Saved Filters Limit",
-  "@guestSavedFiltersLimitLabel": {
-    "description": "Label for Guest Saved Filters Limit"
-  },
-  "standardUserSavedFiltersLimitLabel": "Standard User Saved Filters Limit",
-  "@standardUserSavedFiltersLimitLabel": {
-    "description": "Label for Standard User Saved Filters Limit"
-  },
-  "premiumUserSavedFiltersLimitLabel": "Premium User Saved Filters Limit",
-  "@premiumUserSavedFiltersLimitLabel": {
-    "description": "Label for Premium User Saved Filters Limit"
-  },
-  "savedFiltersLimitDescription": "Maximum number of saved headlines filters this user role can create.",
-  "@savedFiltersLimitDescription": {
-    "description": "Description for the limit on saved headlines filters"
-  },
   "adPlacementIntervalLabel": "Ad Placement Interval",
   "@adPlacementIntervalLabel": {
     "description": "Label for Ad Placement Interval"