Keep max_new_tokens: 440 on Transformers.js 4.3.2 and pin the seek-loop condition it avoids

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/transformers-runtime.test.ts

@@ -47,4 +47,11 @@ describe("@huggingface/transformers runtime", () => {
     expect(body).toContain("Promise.all(");
     expect(body).toContain("for (const name of Object.keys(names))");
   });
+
+  test("Whisper generate still takes the seek loop when max_new_tokens is unset (D-021, D-WS1b)", () => {
+    // The worker's `max_new_tokens: 440` exists only to dodge this branch.
+    // If upstream changes the condition, re-measure D-021 before touching it.
+    const source = read(join(PKG_DIR, "src/models/whisper/modeling_whisper.js"));
+    expect(source).toContain("if (generation_config.return_timestamps && !kwargs.max_new_tokens)");
+  });
 });