refactor: Date formatting utility class

- Added formatDate method
- Encapsulated logic in class

Author: fulleni

lib/shared/utils/date_formatter.dart

@@ -1,15 +1,29 @@
 import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
-/// Formats the given [dateTime] into a relative time string
-/// (e.g., "5m ago", "Yesterday", "now").
-///
-/// Uses the current locale from [context] to format appropriately.
-/// Returns an empty string if [dateTime] is null.
-String formatRelativeTime(BuildContext context, DateTime? dateTime) {
-  if (dateTime == null) {
-    return '';
+/// A utility class for formatting dates and times.
+abstract final class DateFormatter {
+  /// Formats the given [dateTime] into a relative time string
+  /// (e.g., "5m ago", "Yesterday", "now").
+  ///
+  /// Uses the current locale from [context] to format appropriately.
+  /// Returns an empty string if [dateTime] is null.
+  static String formatRelativeTime(BuildContext context, DateTime? dateTime) {
+    if (dateTime == null) {
+      return '';
+    }
+    final locale = Localizations.localeOf(context).languageCode;
+    return timeago.format(dateTime, locale: locale);
+  }
+
+  /// Formats the given [dateTime] into a short date string (e.g., "Jul 1, 2025").
+  ///
+  /// Returns an empty string if [dateTime] is null.
+  static String formatDate(DateTime? dateTime) {
+    if (dateTime == null) {
+      return '';
+    }
+    return DateFormat.yMMMd().format(dateTime);
   }
-  final locale = Localizations.localeOf(context).languageCode;
-  return timeago.format(dateTime, locale: locale);
 }