Exit works on plain-esplora regtest; human-readable ark status lines

submitPackage falls back to sequential /tx posts when the esplora lacks
POST /txs/package (regtest electrs) — works wherever the node relays
zero-fee v3 parents. The ark card stops speaking developer: in-flight
operations summarize as '{n} deposit(s) confirming' instead of
'board:funded, exit:chain, …', exit lines read 'Exiting N sats —
publishing on-chain…', and transient errors show 'hit a snag — retrying
automatically' instead of raw gRPC/HTTP text.

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

3 files changed, 32 insertions, 10 deletions

diff --git a/src/ark/exit.js b/src/ark/exit.js
index 2770284..9310b65 100644
--- a/src/ark/exit.js
+++ b/src/ark/exit.js
@@ -150,11 +150,22 @@ export function buildExitClaim({ vtxo, keys, serverPub, destScript, feeRate }) {
 
 // Submit a [parent, child] (or single-tx) package via esplora -> bitcoind
 // submitpackage. Treats already-known txs as success so retries are safe.
+// Esploras without the endpoint (regtest electrs) fall back to sequential
+// /tx posts — which relays only if the node accepts zero-fee v3 parents
+// (regtest with -minrelaytxfee=0); otherwise the node's error surfaces.
 export async function submitPackage(esploraBase, hexes) {
   const r = await fetch(`${esploraBase}/txs/package`, { method: 'POST', body: JSON.stringify(hexes) });
   const body = await r.text();
-  if (!r.ok && !/already|duplicate/i.test(body)) {
-    throw new Error(`package submit failed: ${body.slice(0, 160)}`);
+  if (r.ok || /already|duplicate/i.test(body)) return body;
+  if (r.status === 404 || /endpoint does not exist/i.test(body)) {
+    for (const hx of hexes) {
+      const br = await fetch(`${esploraBase}/tx`, { method: 'POST', body: hx });
+      const bb = await br.text();
+      if (!br.ok && !/already|duplicate/i.test(bb)) {
+        throw new Error(`broadcast failed: ${bb.slice(0, 160)}`);
+      }
+    }
+    return 'sequential';
   }
-  return body;
+  throw new Error(`package submit failed: ${body.slice(0, 160)}`);
 }
diff --git a/src/features/ark.js b/src/features/ark.js
index 9a180f7..57a8f82 100644
--- a/src/features/ark.js
+++ b/src/features/ark.js
@@ -278,9 +278,15 @@ export function arkFeature(ctx) {
       { class: 'card col', style: 'gap:10px' },
       ...head,
       spendables.length ? row(t('arkVtxos'), String(spendables.length)) : null,
-      pendingActions.length
-        ? h('div', { class: 'small muted' }, t('arkPendingActions', { n: pendingActions.length }) + ' — ' + pendingActions.map((a) => `${a.type}:${a.step}`).join(', '))
-        : null,
+      // in-flight operations, summarized in plain words (exits get their own
+      // per-exit status lines below)
+      (() => {
+        const counts = {};
+        for (const a of pendingActions) { if (a.type !== 'exit') counts[a.type] = (counts[a.type] || 0) + 1; }
+        const LABEL = { board: 'arkOpsBoard', send: 'arkOpsSend', refresh: 'arkOpsRefresh', offboard: 'arkOpsOffboard' };
+        const parts = Object.entries(counts).map(([type, n]) => t(LABEL[type] || 'arkPendingActions', { n }));
+        return parts.length ? h('div', { class: 'small muted' }, parts.join(' · ')) : null;
+      })(),
       spendables.length >= 1
         ? h('button', { class: 'btn-ghost btn-block', disabled: !!ui.arkBusy, onClick: doArkRefresh },
             ui.arkBusy === 'refresh' ? h('span', { class: 'spinner sm' }) : t('arkRefreshBtn', { n: spendables.length }))
@@ -295,7 +301,7 @@ export function arkFeature(ctx) {
           a.step === 'chain' ? t('arkExitChainStatus', { n: fmtAmount(a.amountSat) })
             : a.step === 'timelock' ? t('arkExitTimelockStatus', { n: fmtAmount(a.amountSat), blocks: String(a.claimableAt) })
             : t('arkExitClaimingStatus', { n: fmtAmount(a.amountSat) }),
-          a.lastError ? h('div', { class: 'small err' }, a.lastError) : null))
+          a.lastError ? h('div', { class: 'small faint' }, t('arkExitRetrying')) : null))
     );
   }
 
diff --git a/src/i18n.js b/src/i18n.js
index 47e93f4..6c40a74 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -391,9 +391,14 @@ const STR = {
     arkExitBtn: 'Exit on-chain without the server ({n} coin(s))',
     arkExitStarted: 'Unilateral exit started for {n} coin(s) — broadcasting the exit chain.',
     arkExitNoFeeCoin: 'Exiting needs an on-chain coin to pay the exit-chain fees.',
-    arkExitChainStatus: 'Exit {n}: broadcasting the exit chain…',
-    arkExitTimelockStatus: 'Exit {n}: waiting for the timelock (claimable at block {blocks})',
-    arkExitClaimingStatus: 'Exit {n}: claim broadcast, awaiting confirmation',
+    arkExitChainStatus: 'Exiting {n} sats — publishing on-chain…',
+    arkExitTimelockStatus: 'Exiting {n} sats — waiting out the timelock (block {blocks})',
+    arkExitClaimingStatus: 'Exiting {n} sats — almost done, awaiting confirmation',
+    arkExitRetrying: 'hit a snag — retrying automatically',
+    arkOpsBoard: '{n} deposit(s) confirming',
+    arkOpsSend: '{n} send(s) finishing up',
+    arkOpsRefresh: '{n} refresh(es) waiting for the next round',
+    arkOpsOffboard: '{n} withdrawal(s) confirming',
     arkExited: 'Exited on-chain',
     arkExitHistory: 'Ark exit',
     arkRefreshStarted: 'Refresh submitted — completes with the next round.',