Add cash purchase of points (points_pay_s), wallet withdraw requests via
AKSRT_Withdrawal, Zibll-style dual-card layout with tabbed balance/points
ledgers, and admin switches for buy-points packages and balance withdraw.
Introduce AKSRT_Balance (user_meta aksrt_balance + balance_log) for
Zibll-like pay_balance wallet. User center assets panel shows wallet
and points; balance gateway/card-pass/refunds credit cash when enabled.
kate522