fix(manager): align frontend and backend field contracts

main/manager-web/tests/timbreContract.test.mjs

@@ -0,0 +1,17 @@
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+import test from 'node:test';
+
+const timbreApiSource = await readFile(
+  new URL('../src/apis/module/timbre.js', import.meta.url),
+  'utf8',
+);
+
+test('timbre update sends the current sort value to the backend', () => {
+  const updateStart = timbreApiSource.indexOf('updateVoice(params, callback)');
+
+  assert.notEqual(updateStart, -1);
+  const updateSource = timbreApiSource.slice(updateStart);
+  assert.match(updateSource, /\.method\('PUT'\)/);
+  assert.match(updateSource, /sort:\s*params\.sort/);
+});