Mark Houdini private swaps on the action

[j0ntz]

CHANGELOG

Does this branch warrant an entry to the CHANGELOG?

• Yes
• No

Dependencies

• EdgeApp/edge-core-js#742 adds privacy to EdgeTxActionSwap. This PR builds and passes tests without it (the field is typed locally in src/swap/types.ts), but a core without that change drops the flag when it cleans the saved action, so the flag only reaches disk once the app runs a core that carries it.

Description

Asana task

Houdini now writes privacy on the saved swap action, true when the request asked for a private route (request.privacy === 'required') and false otherwise, the same way it already does on swapSend actions.

A Stealth Swap (a private swap between two of the user's own wallets) saved an action identical to a transparent Houdini swap, so the GUI titled it "Swap Funds". The provider id cannot stand in for the flag because Houdini also serves transparent routes.

EdgeTxActionSwapPlugin in src/swap/types.ts is a local stand-in for the core type and can go once this repo's edge-core-js dev dependency includes the core change.

Test: test/houdini.test.ts checks the flag on a wallet-to-wallet swap with and without a required-privacy request.

---

Note

Low Risk
Metadata-only change to saved swap actions and local types; behavior is gated on the swap request’s privacy flag with new test coverage.

Overview
Houdini wallet-to-wallet swaps now persist a privacy flag on the saved transaction action (actionType: 'swap'), matching behavior that already existed for pasted-address swapSend flows. The value is true when request.privacy === 'required' and false otherwise, so the GUI can distinguish Stealth (private) swaps from transparent Houdini routes that use the same provider.

Local typing adds EdgeTxActionSwapPrivacy and extends EdgeTxActionSwapPlugin until installed edge-core-js includes privacy on EdgeTxActionSwap. A CHANGELOG unreleased fix line and a Houdini test assert the flag for wallet-to-wallet quotes with and without required privacy.

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