WalletBeat simulation: token and NFT asset-delta rendering

[0xpantera]

Problem

WalletBeat transaction-simulation fixtures include ERC-20, ERC-721, ERC-1155, and all-token asset changes. Deckard currently does not render simulated token balance/NFT deltas.

Scope

• Build on verified metadata/state reads and simulation/preflight outputs.
• Render token/NFT deltas for ERC-20 mint/transfer, ERC-721 mint/transfer, ERC-1155 mint/transfer, and mixed-token transactions.
• Keep unsupported token standards fail-closed until rendered legibly.

Acceptance criteria

• WalletBeat erc20-mint, erc721-mint, erc1155-mint, erc20-transfer, erc721-transfer, erc1155-transfer, and all-token-transfer have positive simulation-display coverage.