fix: isolate overlapping Human Gate loads

frontend/human-gates.js

@@ -10,6 +10,7 @@ function createHumanGates(options = {}) {
   let reviewSnapshot = [];
   let reviewIndex = -1;
   let loadedAccountKey = '';
+  let loadEpoch = 0;
   const decisionKeys = new Map();
   let decisionFlight = null;
 
@@ -80,6 +81,7 @@ function createHumanGates(options = {}) {
   }
 
   async function load() {
+    const epoch = ++loadEpoch;
     const accountKey = String(getAccountKey() || '').trim().toLowerCase();
     if (accountKey !== loadedAccountKey) {
       loadedAccountKey = accountKey;
@@ -92,12 +94,14 @@ function createHumanGates(options = {}) {
     if (cached) { queue = cached; render(); }
     try {
       const live = validSnapshot(await fetchJson('api/v1/human-gates'));
+      if (epoch !== loadEpoch || accountKey !== loadedAccountKey) return queue;
       if (!live) throw new Error('Human Gates response is invalid.');
       queue = { pending_count: live.pending_count, items: live.items.slice() };
       save(queue);
       render();
       return queue;
     } catch (error) {
+      if (epoch !== loadEpoch || accountKey !== loadedAccountKey) return queue;
       if (!cached) throw error;
       setText(nodes.status, 'Offline cached gate list · reconnect before deciding.');
       return queue;