fix: candidate ui can't be drawn correctly after GPU reset

[fxliang]

after GPU reset ( situation of driver reinstalling, wakeup ETC. ), the render target object will be invalid.

reset direct2d resources if EndDraw() failed, then refresh the ui.

Tested by powershell script( run as admin)

# 在管理员权限下运行，禁用gpu然后重新启用
# 未修复前可触发小狼毫候选栏空白的bug
Set-ExecutionPolicy RemoteSigned -Scope Process
# 获取显卡设备
$gpu = Get-PnpDevice -Class Display | Where-Object { $_.Status -eq 'OK' }
if ($gpu) {
    # 停用显卡设备
    Disable-PnpDevice -InstanceId $gpu.InstanceId -Confirm:$false
    # 等待
    Start-Sleep -Seconds 2
    # 启用显卡设备
    Enable-PnpDevice -InstanceId $gpu.InstanceId -Confirm:$false
    Write-Host "显卡驱动已成功重新加载。"
} else {
    Write-Host "未找到有效的显卡设备。"
}