Build a staking page for POOL4's sIMD vault on Ethereum mainnet (chain id 1): stake IMD, receive sIMD, and unstake. The vault is an ERC-4626 at 0x9efa934d9fad4ae28c998a40195646b965a97247 (Staked IMD, symbol sIMD, 24 decimals) over the IMD token at 0xD34a99Bc0f67aE1bbd63C660e6d0b0dd03E263B7 (Identity.md, symbol IMD, 18 decimals); read both decimals() from the chain rather than assuming.

Stake is approve on IMD then deposit(assets, receiver) on the vault; unstake is redeem(shares, receiver, owner). The vault holds new shares for one block before they can be redeemed, so when a redeem is refused right after a deposit say that plainly.

Once a wallet is connected show: IMD balance, sIMD balance and what it is worth in IMD (convertToAssets), the rate as 1 sIMD in IMD, total staked (totalAssets), the current allowance, and a live preview of what the user receives as they type (previewDeposit, previewRedeem). Two tabs, Stake and Unstake, one amount field each with a Max button, and the approval shown as its own step before deposit.

Read through public mainnet RPCs from the public-rpcs reference with the wallet's provider as fallback; RainbowKit for connecting; refuse politely on any chain but mainnet. Link the vault and the token on Etherscan.

Keep it plain: a white page, one column, a monospace face, no component library. Title the page 'Stake IMD'. Nothing secret in the repository.