fix: prevent Bitcoin Core switch from hanging the Hub UI

app/sovran_systemsos_web/static/js/constants.js

@@ -5,6 +5,10 @@
 const POLL_INTERVAL_SERVICES    = 5000;
 const POLL_INTERVAL_UPDATES     = 1800000;
 const UPDATE_POLL_INTERVAL      = 2000;
+// Max consecutive failed rebuild/update status polls before the page gives up
+// waiting and reloads to re-sync (2s interval → ~2 minutes of failures).
+// A brief Hub restart during activation only causes a handful of failures.
+const STATUS_POLL_MAX_FAILURES  = 60;
 const REBOOT_CHECK_INTERVAL     = 5000;
 const REBOOT_FETCH_TIMEOUT      = 12000;
 const REBOOT_REQUEST_TIMEOUT    = 4000;

app/sovran_systemsos_web/static/js/rebuild.js

@@ -8,6 +8,7 @@ function openRebuildModal() {
   _rebuildLogOffset = 0;
   _rebuildServerDown = false;
   _rebuildFinished = false;
+  _rebuildPollFailures = 0;
   if ($rebuildLog) { $rebuildLog.textContent = ""; $rebuildLog.style.display = "none"; }
   var action = _rebuildIsEnabling ? "Enabling" : "Disabling";
   var label = _rebuildFeatureName || "feature";
@@ -45,6 +46,7 @@ async function pollRebuildStatus() {
   if (_rebuildFinished) return;
   try {
     var data = await apiFetch("/api/rebuild/status?offset=" + _rebuildLogOffset);
+    _rebuildPollFailures = 0;
     if (_rebuildServerDown) { _rebuildServerDown = false; }
     if (data.log) appendRebuildLog(data.log);
     _rebuildLogOffset = data.offset;
@@ -57,6 +59,18 @@ async function pollRebuildStatus() {
       onRebuildDone(data.result === "success");
     }
   } catch (err) {
+    _rebuildPollFailures += 1;
+    // The Hub restarts itself during activation, which briefly drops this poll.
+    // If polling stays broken long past a normal restart, the page's session
+    // almost certainly no longer matches the server (e.g. the Hub restarted
+    // and sessions were not recovered).  Reload to re-authenticate and show
+    // the real feature state instead of spinning forever.
+    if (_rebuildPollFailures >= STATUS_POLL_MAX_FAILURES) {
+      _rebuildFinished = true;
+      stopRebuildPoll();
+      window.location.reload();
+      return;
+    }
     if (!_rebuildServerDown) { _rebuildServerDown = true; if ($rebuildStatus) $rebuildStatus.textContent = "Applying changes…"; }
   }
 }

app/sovran_systemsos_web/static/js/state.js

@@ -9,6 +9,7 @@ let _updatePollTimer  = null;
 let _updateLogOffset  = 0;
 let _serverWasDown    = false;
 let _updateFinished   = false;
+let _updatePollFailures = 0; // consecutive failed update-status polls
 let _supportTimerInt      = null;
 let _supportEnabledAt     = null;
 let _supportStatus        = null;   // last fetched /api/support/status payload
@@ -25,6 +26,7 @@ let _rebuildLogOffset     = 0;
 let _rebuildPollTimer     = null;
 let _rebuildFinished      = false;
 let _rebuildServerDown    = false;
+let _rebuildPollFailures  = 0; // consecutive failed rebuild-status polls
 let _pendingToggle        = null; // {feature, extra} waiting for domain/confirm
 let _rebuildFeatureName   = "";
 let _rebuildIsEnabling    = true;

app/sovran_systemsos_web/static/js/update.js

@@ -33,6 +33,7 @@ function _doOpenUpdateModal() {
   _updateLogOffset = 0;
   _serverWasDown = false;
   _updateFinished = false;
+  _updatePollFailures = 0;
   if ($modalLog) $modalLog.textContent = "";
   if ($modalStatus) $modalStatus.textContent = "Starting update…";
   if ($modalSpinner) $modalSpinner.classList.add("spinning");
@@ -94,6 +95,7 @@ async function pollUpdateStatus() {
   if (_updateFinished) return;
   try {
     var data = await apiFetch("/api/updates/status?offset=" + _updateLogOffset);
+    _updatePollFailures = 0;
     if (_serverWasDown) {
       _serverWasDown = false;
       if (!data.running) {
@@ -143,6 +145,16 @@ async function pollUpdateStatus() {
       onUpdateDone(false);
     }
   } catch (err) {
+    _updatePollFailures += 1;
+    // Same guard as the rebuild modal: if polling stays broken long past a
+    // normal Hub restart, reload to re-authenticate and show the real state
+    // instead of spinning forever.
+    if (_updatePollFailures >= STATUS_POLL_MAX_FAILURES) {
+      _updateFinished = true;
+      stopUpdatePoll();
+      window.location.reload();
+      return;
+    }
     if (!_serverWasDown) { _serverWasDown = true; appendLog("\n[Server restarting — waiting for it to come back…]\n"); if ($modalStatus) $modalStatus.textContent = "Server restarting…"; }
   }
 }