When only Waffo was enabled, the generic payment method list showed a
"Waffo (Global Payment)" button calling preTopUp (epay flow) instead of
waffoTopUp, while the dedicated "Waffo 充值" section had the correct buttons.
Fix: filter waffo entries from generic list and hide the "选择支付方式"
column when no non-waffo methods exist.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
