feat(wxcp): 活动封面改用附件中间表，报名姓名手机号改为选填

liu

2026-09-30 91491239c5d4611b5b1404a7abeb2bb23d0edad5

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$osInfo = Get-WmiObject -Class Win32_OperatingSystem
# check if running on Windows Server
if ($osInfo.ProductType -eq 3) {
  Install-WindowsFeature Server-Media-Foundation
}