[Bug][Critical] Internal env variable name exposed in UI: 'Set VITE_MOONPAY_API_KEY to enable MoonPay'

[hartsring]

Description

The 购买 (Buy) button has a tooltip/aria-label that reads "Set VITE_MOONPAY_API_KEY to enable MoonPay", exposing an internal environment variable name to end users.

Steps to Reproduce

1. Open the wallet dashboard
2. Hover over or inspect the 购买 (Buy) button

Expected Behavior

User-friendly message shown, e.g. "购买功能暂不可用".

Actual Behavior

Tooltip reads: "Set VITE_MOONPAY_API_KEY to enable MoonPay"

Severity

Critical — information disclosure / developer config leak