Per-coin spot balances for a wallet on Hyperliquid

HL Info `spotClearinghouseState` — the wallet's spot balances in `native`: `balances[]` of `{ coin, token, total, hold, entryNtl }`. `total` = full balance (for unified-mode wallets the USDC total is marked live and includes perp margin + uPnL); `hold` = the portion committed as margin/orders; `entryNtl` = cost basis. Powers a Balances tab / per-coin breakdown. Served from the self-hosted node (no HL rate-limit cost). Public — `?user=` lowercased server-side.