feat(bridge): push notification on deposit settlement [ENG-275]

[islandbitcoin]

ENG-275 — Push notification on /deposit and /transfer

Completes the deposit side of ENG-275. The withdrawal-completion push already exists (transfer.ts → sendBridgeWithdrawalNotificationBestEffort on transfer.completed/failure), so this PR adds the missing deposit settlement push (the must-have launch gate).

Where it fires

A Bridge USDT deposit settles when IBEX sends its crypto.received webhook. The push is fired at the success point of services/ibex/webhook-server/routes/crypto-receive.ts, where:

• the account is resolved (findByBridgeEthereumAddress — so it's Bridge-specific),
• the USDT amount is validated,
• and it's inside the per-txHash LockService block → idempotent, fires once per deposit.

What's added

• src/app/bridge/send-deposit-notification.ts — sendBridgeDepositNotification(BestEffort), mirroring the existing withdrawal-notification function (resolve account→user→deviceTokens, PushNotificationsService().sendFilteredNotification, best-effort token-cleanup + warn).
• notification.bridgeDeposit.{title,body} i18n phrases in en.json + es.json.
• One call wired into the crypto-receive settlement handler.

Notes

• Server-side trigger only (per ticket); mobile display/config is the separate Nick ticket.
• No new env/config — reuses the existing push-notification infrastructure (FCM).
• Currency display mirrors the withdrawal notif (USDT → "USD" in the payload).
• Diff is purely additive (+113 / -0). New file lint-clean; touched files type-check. (Pre-existing base lint/test debt in surrounding files is not touched.)

Acceptance

• A successful Bridge deposit (crypto.received settles) triggers a push; a successful withdrawal (transfer.completed) already does. Mobile receives + displays (Nick's client work).

🤖 Generated with Claude Code

[linear]

ENG-275