Add Ark <-> Lightning via the ASP (captaind-native submarine swaps)

The ASP is the HTLC counterparty (second.tech's protocol), so no external
swap provider is needed: paying a bolt11 converts pubkey vtxos into
ServerHtlcSend vtxos the server can only claim by revealing the invoice
preimage; receiving grants ServerHtlcRecv vtxos claimed by revealing ours.
Failure paths cosign the HTLC back (revocation) — proven end-to-end against
regtest captaind, which independently derives the HTLC taproots.

- ark/lightning.js: bolt11 decode, lightning fee schedules, all pay/receive
  gRPC-web wrappers (cosign, initiate, status, revocation, hold-invoice
  receive flow, anti-DoS attestation)
- ark/send.js: arkoor builder generalized to policy outputs (pubkey /
  serverHtlcSend / serverHtlcRecv), two-leaf taproot trees, HTLC clause
  scripts, reusable per-part cosign helpers for package RPCs
- ark/manager.js: ln-pay and ln-recv crash-safe action state machines
  (deterministic receive preimages from the seed, chain 5), mailbox
  lightning notifications, unpayable-invoice -> instant revocation
- proto.js: lightning ArkInfo fields + mailbox lightning message decode
- validate/refresh: policy-aware vtxo validation and reconstruction
- features: bolt11 routes via ark when the balance covers it (Boltz stays
  the fallback), lightning-invoice receive on the Ark pane
- tools/ark/ln-test.js: harness proving HTLC cosign + revocation against
  captaind; manager-test.js updated for the consolidated bc-container chain

Co-Authored-By: Claude Fable 5 <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/i18n.js b/src/i18n.js
index 04e7e06..82a397b 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -427,6 +427,18 @@ const STR = {
     arkOpsSend: '{n} send(s) finishing up',
     arkOpsRefresh: '{n} refresh(es) waiting for the next round',
     arkOpsOffboard: '{n} withdrawal(s) confirming',
+    arkOpsLnPay: '{n} Lightning payment(s) in flight',
+    arkOpsLnRecv: '{n} Lightning invoice(s) outstanding',
+    arkLnPayVia: 'Instant, from your Ark balance',
+    arkLnFee: 'Ark fee',
+    arkLnPaying: 'Paying invoice…',
+    arkLnPayFailed: 'Payment failed',
+    arkLnRefunded: 'Payment failed — funds returned to your Ark balance.',
+    arkLnPaidTitle: 'Paid!',
+    arkLnInvoiceIntro: 'Or receive over Lightning, straight into your Ark balance.',
+    arkLnPaidHistory: 'Paid Lightning invoice',
+    arkLnReceivedHistory: 'Received over Lightning',
+    arkLnCancelInvoice: 'Cancel invoice',
     arkExited: 'Exited on-chain',
     arkExitHistory: 'Ark exit',
     arkRefreshStarted: 'Refresh submitted — completes with the next round.',