update carton form and add recent search

lib/helpers/shared_pref.dart

@@ -88,4 +88,24 @@ class SharedPref {
     final prefs = await SharedPreferences.getInstance();
     prefs.remove(key);
   }
+
+  static Future<void> saveRecentSearch(String key, String query) async {
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    //Use `Set` to avoid duplication of recentSearches
+    Set<String> allSearches = prefs.getStringList(key)?.toSet() ?? {};
+
+    //Place it at first in the set
+    allSearches = {query, ...allSearches};
+    prefs.setStringList(key, allSearches.toList());
+  }
+
+  static Future<List<String>?> getRecentSearch(String key, String query) async {
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    final allSearches = prefs.getStringList(key);
+    return allSearches!.where((search) => search.startsWith(query)).toList();
+  }
+
+  static Future<void> clearRecentSearch(String key) async {
+    return await _remove(key);
+  }
 }