chore: update app, infra configs, assets

app/.env

@@ -1,6 +1,7 @@
 APP_PORT=3001
 APP_HOST=https://capay.hao.work
 PLAN=free
+ADMIN_API_KEY=whoami139
 
 # Low-cost polling for free plan
 TX_POLL_INTERVAL_MS=180000
@@ -14,6 +15,13 @@ ETHEREUM_RPC_URL=https://eth-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n
 # Optional: comma-separated RPC URLs (overrides/extends)
 # ETHEREUM_RPC_URLS=https://eth-mainnet.g.alchemy.com/v2/KEY1,https://eth-mainnet.g.alchemy.com/v2/KEY2
 
+# Bitcoin RPC via Alchemy (optional)
+ALCHEMY_BTC_API_KEYS=P9kZiHB6Q7CLrBlMsUN3n
+ALCHEMY_BTC_API_KEY=P9kZiHB6Q7CLrBlMsUN3n
+# Optional: full RPC URL with auth (overrides/extends)
+# BTC_RPC_URL=https://alchemy:YOUR_KEY@bitcoin-mainnet.g.alchemy.com/v2/YOUR_KEY
+# BTC_RPC_URLS=https://alchemy:KEY1@bitcoin-mainnet.g.alchemy.com/v2/KEY1,https://alchemy:KEY2@bitcoin-mainnet.g.alchemy.com/v2/KEY2
+
 # Webhook signature secrets (replace in production)
 IPN_HMAC_SECRET=replace-with-strong-secret
 BTCPAY_WEBHOOK_SECRET=replace-with-strong-secret