feat: Simplify new tab page code

Author: Pinguin2001

src/Bluebird/Pages/NewTabPage.xaml

@@ -49,32 +49,19 @@
                     </Grid.ColumnDefinitions>
                     <TextBox
                         x:Name="UrlBox"
+                        Grid.Column="0"
                         Width="400"
                         IsSpellCheckEnabled="False"
                         KeyDown="UrlBox_KeyDown"
                         Loaded="UrlBox_Loaded"
                         PlaceholderText="Type here to search or enter url" />
-                    <StackPanel
+                    <Button
                         Grid.Column="1"
+                        Height="32"
                         Margin="5,0,0,0"
-                        Orientation="Horizontal">
-                        <Button
-                            Grid.Column="0"
-                            Height="32"
-                            Click="SearchButton_Click"
-                            Tag="Search">
-                            <Button.Content>
-                                <FontIcon Glyph="&#xE721;" />
-                            </Button.Content>
-                        </Button>
-                        <Button
-                            Grid.Column="1"
-                            Height="32"
-                            Margin="5,0,0,0"
-                            Click="SearchButton_Click"
-                            Content="✨"
-                            Tag="AISearch" />
-                    </StackPanel>
+                        Click="AISearchButton_Click"
+                        Content="✨"
+                        ToolTipService.ToolTip="Search with AI" />
                 </Grid>
             </Grid>
             <!--<ListView

src/Bluebird/Pages/NewTabPage.xaml.cs

@@ -37,7 +37,10 @@ private void UrlBox_KeyDown(object sender, KeyRoutedEventArgs e)
         if (e.Key == VirtualKey.Enter)
         {
             string input = (sender as TextBox).Text;
-            ProcessQueryAndGo(input);
+            if (!string.IsNullOrEmpty(input))
+            {
+                ProcessQueryAndGo(input);
+            }
         }
     }
 
@@ -47,20 +50,12 @@ private void NavigateToUrl(string query)
         Frame.Navigate(typeof(WebViewPage), parameters, new DrillInNavigationTransitionInfo());
     }
 
-    private void SearchButton_Click(object sender, RoutedEventArgs e)
+    private void AISearchButton_Click(object sender, RoutedEventArgs e)
     {
         string query = UrlBox.Text;
         if (!string.IsNullOrEmpty(query))
         {
-            switch ((sender as Button).Tag)
-            {
-                case "Search":
-                    ProcessQueryAndGo(query);
-                    break;
-                case "AISearch":
-                    NavigateToUrl("https://www.perplexity.ai/search?q=" + query);
-                    break;
-            }
+            NavigateToUrl("https://www.perplexity.ai/search?q=" + query);
         }
     }