修复聊天框打字时自动消失

VPet-Simulator.Windows/WinDesign/TalkBox.xaml

@@ -19,7 +19,7 @@
             </Grid.RowDefinitions>
             <TextBox x:Name="tbTalk" Style="{DynamicResource StandardTextBoxStyle}" Height="Auto"
                     pu:TextBoxHelper.Watermark="{ll:Str 和桌宠说}" FontSize="30" AcceptsReturn="True"
-                    TextWrapping="WrapWithOverflow" PreviewKeyDown="tbTalk_KeyDown" />
+                    TextWrapping="WrapWithOverflow" PreviewKeyDown="tbTalk_KeyDown" TextChanged="tbTalk_TextChanged" />
             <Button pu:ButtonHelper.CornerRadius="4" Content="{ll:Str '发送'}" BorderThickness="2"
                     Background="{DynamicResource SecondaryLight}" Grid.Column="2"
                     BorderBrush="{DynamicResource DARKPrimaryDarker}" FontSize="30" Click="SendMessage_Click"

VPet-Simulator.Windows/WinDesign/TalkBoxAPI.xaml

@@ -15,7 +15,7 @@
             </Grid.ColumnDefinitions>
             <TextBox x:Name="tbTalk" Style="{DynamicResource StandardTextBoxStyle}" Height="Auto"
                     pu:TextBoxHelper.Watermark="{ll:Str 和桌宠说}" FontSize="30" AcceptsReturn="True" TextWrapping="WrapWithOverflow"
-                    PreviewKeyDown="tbTalk_KeyDown" />
+                    PreviewKeyDown="tbTalk_KeyDown" TextChanged="tbTalk_TextChanged" />
             <Button pu:ButtonHelper.CornerRadius="4" Content="{ll:Str 发送}" BorderThickness="2"
                     Background="{DynamicResource PrimaryLight}" Grid.Column="2" ToolTip="{ll:Str '按 Ctrl+Enter 发送'}"
                     BorderBrush="{DynamicResource DARKPrimaryDarker}" FontSize="30" Click="SendMessage_Click" />