fix: drain first-task completion during Today refresh (Closes #1156)

frontend/today-sync.js

@@ -303,7 +303,10 @@ function createTodaySync({ storage, getLogin, fetchJson, onRemoteIds, onRemotePl
       let operations = pending();
       let plan;
       let hadConflict = false;
-      if (!operations.length) plan = await fetchJson('api/v1/today');
+      if (!operations.length) {
+        plan = await fetchJson('api/v1/today');
+        operations = pending();
+      }
       while (operations.length) {
         if (key() !== ownerKey) return false;
         const batch = operations.slice(0, 50);

tests/test_today_sync.py

@@ -84,6 +84,53 @@ sync.enqueue('add', 'issue:r:1:');
     }
 
 
+def test_activation_queued_during_an_empty_inflight_refresh_is_drained_before_it_settles():
+    script = f"""
+const createTodaySync = require({json.dumps(str(TODAY_SYNC))});
+const values = new Map();
+const storage = {{get length(){{return values.size}},key:i=>[...values.keys()][i]||null,
+  getItem:k=>values.get(k)||null,setItem:(k,v)=>values.set(k,v),removeItem:k=>values.delete(k)}};
+let releaseRefresh;
+const refreshStarted = new Promise(resolve => {{ globalThis.refreshStarted = resolve; }});
+const patches = [];
+const statuses = [];
+const sync = createTodaySync({{
+  storage, getLogin: () => 'timmy', createOperationId: () => 'activation-1',
+  fetchJson: async (_url, options={{}}) => {{
+    if (!options.method) {{
+      globalThis.refreshStarted();
+      await new Promise(resolve => {{ releaseRefresh = resolve; }});
+      return {{revision:0, ids:[]}};
+    }}
+    const operations = JSON.parse(options.body).operations;
+    patches.push(...operations);
+    return {{revision:1, ids:[], first_task_state:'complete',
+      accepted_operation_ids:operations.map(item => item.operation_id)}};
+  }},
+  onRemoteIds: () => {{}}, onStatus: state => statuses.push(state),
+}});
+(async () => {{
+  const refreshing = sync.flush();
+  await refreshStarted;
+  sync.enqueueActivation('complete');
+  const sharedFlush = sync.flush();
+  releaseRefresh();
+  await sharedFlush;
+  process.stdout.write(JSON.stringify({{
+    sharesInflight: refreshing === sharedFlush, patches, pending:sync.pending(), statuses,
+  }}));
+}})();
+"""
+    result = json.loads(subprocess.run(
+        ["node", "-e", script], check=True, capture_output=True, text=True
+    ).stdout)
+
+    assert result["sharesInflight"] is True
+    assert [operation["activation_state"] for operation in result["patches"]] == ["complete"]
+    assert result["pending"] == []
+    assert result["statuses"][-1] == "saved"
+
+
 def test_operations_queued_in_the_same_millisecond_preserve_enqueue_order():
     script = f"""
 const createTodaySync = require({json.dumps(str(TODAY_SYNC))});