Fix Select prompt failing to accept exact match when items share a common prefix

Sharprompt.Tests/PaginatorTests.cs

@@ -87,4 +87,45 @@ public void SelectedItem_EmptyList()
 
         Assert.False(selected);
     }
+
+    [Fact]
+    public void SelectedItem_ExactMatch()
+    {
+        var items = new[] { "Select", "SelectWithEnum", "MultiSelect", "MultiSelectWithEnum" };
+        var paginator = new Paginator<string>(items, items.Length, Optional<string>.Empty, x => x);
+
+        paginator.UpdateFilter("Select");
+
+        var selected = paginator.TryGetSelectedItem(out var selectedItem);
+
+        Assert.True(selected);
+        Assert.Equal("Select", selectedItem);
+    }
+
+    [Fact]
+    public void SelectedItem_ExactMatch_CaseInsensitive()
+    {
+        var items = new[] { "Select", "SelectWithEnum", "MultiSelect", "MultiSelectWithEnum" };
+        var paginator = new Paginator<string>(items, items.Length, Optional<string>.Empty, x => x);
+
+        paginator.UpdateFilter("select");
+
+        var selected = paginator.TryGetSelectedItem(out var selectedItem);
+
+        Assert.True(selected);
+        Assert.Equal("Select", selectedItem);
+    }
+
+    [Fact]
+    public void SelectedItem_NoExactMatch()
+    {
+        var items = new[] { "Select", "SelectWithEnum", "MultiSelect", "MultiSelectWithEnum" };
+        var paginator = new Paginator<string>(items, items.Length, Optional<string>.Empty, x => x);
+
+        paginator.UpdateFilter("Sel");
+
+        var selected = paginator.TryGetSelectedItem(out _);
+
+        Assert.False(selected);
+    }
 }

Sharprompt/Internal/Paginator.cs

@@ -49,6 +49,19 @@ public bool TryGetSelectedItem([NotNullWhen(true)] out T? selectedItem)
 
         if (_selectedIndex == -1 || _filteredItems.Length == 0)
         {
+            if (!string.IsNullOrEmpty(FilterKeyword))
+            {
+                foreach (var item in _filteredItems)
+                {
+                    if (_textSelector(item).Equals(FilterKeyword, StringComparison.OrdinalIgnoreCase))
+                    {
+                        selectedItem = item;
+
+                        return true;
+                    }
+                }
+            }
+
             selectedItem = default;
 
             return false;