feat: Withdrawal to any token (Predict)

[dan437]

Explanation

Adds support for "post-quote" withdrawal flows, enabling users to withdraw funds to any token/chain (e.g., Predict withdrawals).

Changes:

• Add isPostQuote flag to transaction data for withdrawal-first flows
• Add setIsPostQuote controller action to enable post-quote mode
• Support EXACT_INPUT trade type in Relay strategy for withdrawals (user specifies source amount, receives quote for destination)
• Build post-quote requests in buildQuoteRequests when isPostQuote is true
• Handle same-token-same-chain withdrawals without requiring a bridge
• Add source amount tracking for post-quote flows
• Put the deposit into a batch with the original transaction

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Touches quote construction and Relay batch submission logic (including transaction typing and gas handling), which can impact correctness of on-chain execution for withdrawals. Changes are feature-gated by the new isPostQuote flag but broaden behavior in core transaction-pay flows.

Overview
Adds post-quote (withdrawal) support across Transaction Pay by introducing isPostQuote into TransactionData/QuoteRequest and persisting it onto TransactionMeta.metamaskPay (also extending MetamaskPayMetadata in transaction-controller).

Replaces setIsMaxAmount with a callback-based setTransactionConfig, and ensures toggling isPostQuote re-triggers source-amount and quote refresh.

Updates Relay quoting/submission to handle post-quote semantics: keep targetAmountMinimum=0 requests when isPostQuote, use EXACT_INPUT, skip transaction preprocessing, avoid Hyperliquid-deposit normalization in post-quote mode, and submit as a batch that prepends the original transaction ahead of relay steps with corrected type/gasLimit handling.

Adds post-quote-specific source amount derivation (including new source* fields and same-token-same-chain skip logic via isSameToken), includes original transaction gas as fees.transactionGas in totals, and fixes a nested-transfer detection edge case (findIndex returning -1).

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

[matthewwalsh0]

Minor, exported functions at the top, internal below?

[dan437]

Will include it in the next PR!

[matthewwalsh0]

Afraid I totally missed this, was this added between reviews?

We shouldn't need to expose the transaction specific gas externally, as it becomes part of the Relay quote deposit, so it should be encapsulated by the sourceNetwork fee.

We can remove in the upcoming gas fee PR.