Map IBEX crypto sends as USDT on-chain transactions

[islandbitcoin]

Summary

• Maps IBEX transaction type 10 as an outgoing on-chain transaction.
• Preserves USDT amounts and network fees as integer micro-USDT settlement values.
• Adds unit coverage for the $2.50-style crypto send transaction shape.

Verification

• git diff --check
• eslint --no-ignore src/app/wallets/get-transactions-for-wallet.ts test/flash/unit/app/wallets/get-transactions-for-wallet.spec.ts
• jest --config ./test/flash/unit/jest.config.js test/flash/unit/app/wallets/get-transactions-for-wallet.spec.ts --runInBand

[islandbitcoin]

Reviewed the type-10 (IBEX crypto send → USDT on-chain) mapping. Core change looks sound; the rest of the diff is prettier reformatting. Two things to confirm inline. (Noted the flow is validated end-to-end on MacMax.)

[linear]

ENG-414

[islandbitcoin]

Addressed in 2444ccf66:

• Kept IBEX transaction type 10 mapped as outgoing on-chain USDT, and aligned settlementDisplayAmount with the signed settlementAmount for outgoing IBEX send types.
• Verified the mobile transaction item derives direction from settlementAmount and formats Math.abs(settlementAmount), while detail/report surfaces can consume the signed display string.

Focused verification run:

• yarn test:unit test/flash/unit/app/wallets/get-transactions-for-wallet.spec.ts

[islandbitcoin]

Review comments addressed

Both threads resolved.

Thread	Resolution
Type-10 send-only (get-transactions-for-wallet.ts:176)	Confirmed via IBEX docs (docs.poweredbyibex.io → Transaction Types): 9 = Crypto Receive, 10 = Crypto Send. Distinct ids, so type 10 is send-only; unconditional negation is correct. Live list: GET /v2/transaction-types/all.
Display-sign (get-transactions-for-wallet.ts:117)	settlementDisplayAmount now signs types 2/4/10 via toSettlementDisplayAmount (type-10 renders -2.5), so it agrees with settlementAmount. settlementDisplayFee stays unsigned, consistent with the rest of the codebase.

Verification

• get-transactions-for-wallet.spec.ts 8/8, including type-10 assertions: settlementAmount === -2_500_000, settlementDisplayAmount === "-2.5", on-chain initiation/settlement.