Patch folder realtime threads locally

tests/android-folder-realtime-refresh.test.ts

@@ -23,4 +23,14 @@ test("android folder activity refreshes on matching device-scoped conversation u
     /payloadDeviceId\.equals\(folderDeviceId\)/,
     "expected folder activity to reload when the event targets its device",
   );
+  assert.match(
+    source,
+    /tryApplyFolderRealtimePatch\(event\)/,
+    "expected folder activity to try a local thread-row patch before falling back to network reload",
+  );
+  assert.match(
+    source,
+    /threadConversationItem/,
+    "expected folder activity to read the direct thread item patch from realtime payloads",
+  );
 });